ANALYTICAL
CHEMISTRY
.
JULY
World's Analysts to Convene in Lisbon IV/ΓΑΝΎ leading analysts from all over -*-*-*- the world will convene in Lisbon, September 9 t o 16, t o a t t e n d the X V t h International Congress of P u r e and A p plied Chemistry. This congress is de voted to analytical chemistry. T h e technical sessions will consist of five general lectures, one lecture for each of the 10 subsections, and almost 300 technical papers in 10 subsections. These are microchemical, biological, electrical, optical, a n d radiochemical methods, organic complexes, results and statistical interpretations, methods of adsorption and distribution, standardi zation of methods and different appli cations, and general. Among those who h a v e been involved in preparations for t h e congress a r e : Antonio Pereira Forjaz, director of t h e F a c u l t y of Science, Lisbon and chairman of the Executive Committee; Antonio Herculano de Carvalho, I n s t i t u t o Supe rior Técnico, Lisbon, chairman of the scientific committees; Luis de Menezes Acciaiuoli, head of t h e metallurgicchemical laboratory of t h e Ministry of the Economy (Portugal), secretary general of t h e congress ; Pierre Laurent, I n s t i t u t o Superior Técnico, Lisbon, secretary of t h e congress; and I. M . Kolthoff, University of Minnesota, president of the Analytical Section of the International Union of P u r e and Applied Chemistry. H . A. Laitinen, University of Illinois, was responsible for handling papers submitted b y American authors. Host of Special Events
VOLUME
28,
NO.
Sept. 6 - 8 — I U P A C Commission M e e t ings
President of the Republic of Portugal, on September 9. Other special events during t h e week include a state concert, a n d a farewell b a n q u e t . As noted elsewhere, t h e Analytical Section Committee and several of its commissions will meet before and during the scheduled meeting. Other I U P A C bodies will meet. One, t h e Toxicology a n d Industrial Hygiene Commission of the Applied Chemistry Section, will hold a Symposium on Silicious D u s t s in Industry. Portuguese firms representing almost 60 of the world's leading manufacturers a n d distributors of analytical and laborat o r y equipment and supplies will t a k e p a r t in a n exhibit. Present plans call for two plant tours in t h e Lisbon area and a dozen excursions. Some of the excursions will t a k e place during the meeting a n d others, including a 5-day t r i p to t h e Island of Madeira, will t a k e place after t h e congress ends. T h e ladies' program includes visits to t h e T o w n Hall, fair, beaches, museums, a n d port, and concert a n d river boat trips. F u r t h e r details including d a t a on registration, accommodations, travel, excursions, passports a n d visa requirements, a n d costs, are available from the Secretariate General, X V t h I n t e r n a tional Congress, I n s t i t u t o Superior Técnico, Lisbon, Portugal. IUPAC Commission Meeting Schedule T h u r d a y , Sept. 6, 10 A.M. t o 5 P.M. Analytical Section C o m m i t t e e F r i d a y , Sept. 7, 9 A.M. t o 12 noon. Commission on Equilibrium D a t a F r i d a y , Sept. 7, 2 P.M. t o 5 P.M. Commission on Analytical Reaction S a t u r d a y , Sept. 8, 9 A.M. t o 5 P . M . Commission on Electrochemical D a t a
Among those responsible for arranging the Lisbon Conference are (left to right): Antonio Pereira Forjaz, Faculty of Science, Lisbon; Antonio Herculano de Carvalho, Instituto Superior 7,
JULY
1956
. NEWS
Condensed Program
Analytical Section
Industrial and book exhibits, plant tours, ladies' program, and a wide variety of excursions are among t h e host of special events scheduled in conjunction with t h e congress. T h e congress will open with a session presided over b y His Excellency, the
1956
S u n d a y , Sept. 9 Registration F o r m a l opening ceremonies Opening of exhibit M o n d a y , Sept. 10 Technical session Reception Excursion I U P A C Commission M e e t i n g T u e s d a y , Sept. 11 Technical session P l a n t visit Excursion I U P A C Commission M e e t i n g Wednesday, Sept. 12 Technical sessions Excursion T h u r s d a y , Sept. 13 Technical session P l a n t visit Excursions I U P A C Commission M e e t i n g F r i d a y , Sept. 14 Technical sessions S t a t e concert Excursions S a t u r d a y , Sept. 15 Technical sessions Farewell b a n q u e t Excursions Sunday, Sept. 16 Closing sessions Trip to Madeira
S a t u r d a y , Sept. 8, 2 P.M. t o 6 P . M . Commission on Microtechniques M o n d a y , Sept. 10, 2 P.M. t o 6 P . M . Commission on Terminology T u e s d a y , Sept. 1 1 , 2 P.M. t o 6 P.M. Analytical Section C o m m i t t e e Other IUAPC Body Meetings
T h u r s d a y , Sept. 6, 10 A.M. t o 5 P.M. 5 simultaneous meetings of t h e section presidents with one secretary and one m e m b e r of t h e Section C o m m i t t e e F r i d a y , Sept. 7, 10 A.M. t o 12 noon, Executive C o m m i t t e e F r i d a y , Sept. 7, 3 P.M. t o 6 P.M. T h e President, t h e Secretary General and t h e Presidents of all Sections S a t u r d a y , Sept. 8, 10 A.M. t o 5 P . M .
Técnico, Luis de Menezes Acciaiuoli, Ministry of Economy, Portugal; Pierre Laurent, Instituto Superior Técnico; I. M. Kolthoff, Univ. Minnesota; and H. A. Laitinen, Univ. Illinois 19 A
NEWS
L· a ntam-ware
It's New!
Executive Committee and the Presidents of the Sections Thursday, Sept. 13, 10 A.M. to 5 P.M. Trace Elements Commission (Food Divi sion, Applied Chemistry Section)
General Lectures
ARNE TISELIUS, Sweden. A.
J.
P.
Dosage des éléments a l'état de traces dans les minéraux phosphatés. ROBERT VIGIER, North Africa. 9. Eine neue einfache Mikrobestimmung von Jod in biologischem Material.
10.
BUHRIEL MABTI, Spain.
Saturday, Sept. IS, 2:30 P.M. Réactions analytiques chimiques et électrochimiques. G. CHABLOT, France.
11.
antam-ware is the epitome of efficiency and modern design. The kit houses over fifty pieces of small glass apparatus. Clamps, heating mantles, thermometers SCHWARZENBACH, Switzerland. and other accessories are also within Thursday, Sept. 13, 9 A.M. The inches of actual working area. Scores of Basis for Interpreting Results from setups can be assembled from kit compo a Testing Process. nents with a minimum expenditure of time G. VERNIMONT. U. S. A. and energy. The supporting framework Thursday. Sept. 13, comfortably accommodates up to five com A.M. Trenplete assemblies for fractionation, steam, nungsmethoden mit Hilfe von Adatmospheric and vacuum distillation, ex sorptionen. M. K. ZACHERL, Austria. traction, drying, etc. All in only 2.5 sq. ft. Friday, Sept. 14, 11:30 A.M. A of laboratory space! evolucào da quimiea analitica alguns aspectos e impliçàoes. HERCULANO DE Bantam-ware is designed to minimize CARVAI.HO, Portugal. hold-up and facilitate clamping. Con Friday, Sept. 14, 11:30 A.M. Standdensers have ball and socket joints of con ardization of Analytical Methods and stant inside diameter rather than tapered Its Problems. R. J. FOBBES, Holland. joints of varying inside diameter. Bulbs Saturday, Sept. IS, 9 A M. Proand pockets which hold-up and trap dis grammes français en cours de realisatillate in ordinary tapered joint condensers tion au Commissariat à l'Energie are eliminated in Bantam-ware ball and Atomique. J. DEBIESSE, France. socket joint condensers. Losses of a frac tion of an ml. may be insignificant in full size apparatus. In small apparatus such Microchemical Methods losses may well be prohibitive. Ball and socket joints also provide the small degree 1. Ultramicro spectrophotometrie directe of flexibility desired during assembly tc sur papier. Application à des éléments prevent strain in apparatus. minéraux. Cobalt. A. LACOURT ET Clamping is also simplified. BantamP. HEYDRYCKX, Belgium. ware standard taper joints have cylindrical 2. Microanalytical Methods for Deterouter walls. Bantam-ware clamps are de mination of Antimony, Tin, and Their signed to fully engage cylindrical surfaces. Application to Analysis of Tin-Base and Clamping is secure and firm with minimum Lead-Base Alloys. CH. CIMERMAN AND jaw pressure. M. ARIEL, Israel. These are but a few of the outstanding 3. Microdosage du flor. ELIANE DEBAL, features of Bantam-ware. Our new 20 ROGER LKVY ET H E N R I MOUREAÏÏ, page catalog gives complete descriptive France. information and prices. 4. tjber den Nachweis von Spuren. G. GORBACH, Austria. WRITE FOR YOUR FREE COPY 5. Nouvelle méthode rapide de séparation TODAY et de dosage de traces de bore. Application au dosage du bore dans le
KONTES
GLASS COMPANY V1NELAND, NEW JERSEY
Circle No. 20 λ on Readers' Service Card, page 51 A
20 A
silicium.
6.
LUCIEN DUCRET, France.
Microdosage organique du carbone par conductimétrie.
R. DELABY, R. D A -
MIENS, ET G. TSATSAS, France.
halogènes.
YVETTE
SERVIGNE,
France. Jodometrisches Mikroverfahren zur Bestimmung von Phenol auch in Gegenwart von reduzierenden Stoffen. E. SCHTJLEK UND K. BURGER, Hungary.
12.
Les quinones, réactifs de caractérisation de la cysteine.
13.
Ε. NEUZIL ET J. C.
BRETON, Afrique Occidental Française. Komplexometrische Titrationen im TJltramikrobereich. FLASCHKA, Egypt.
14. 15.
F. SADEK UND H.
Dosage de traces de bore dans le silicium.
P.
SEGUIN
ET
L.
DUCRET,
France. Caractérisation et le dosage par chromatographie sur papier de divers polyphenols. Application. S. BOUCHII.LOUX,
Subsection Lectures Monday, Sept. 10, 11:30 A.M. Qualitative Organic Analysis, Especially Spot Test Analysis. FKITZ FEIGL, Brazil. Monday, Sept. 10, 11:30 A.M. To be announced. Tuesday, Sept. 11, 11:30 A.M. Die Hochfrequenztitration in der analytischen Chemie. K. CRUSE, Germany. Tuesday, Sept. Π , 11:30 A.M. Progrès en analyse spectrale moléculaire quantitative. C. DUYCKAERTS, Belgium. Wednesday, Sept. 12, 11:30 A.M. Organic Complexing Agents. G.
Recherches microanalytiques sur les ions
MARTIN,
England. Wednesday, Sept. 12, 2:30 P.M. Interpretation of Acid-Base Titration in Glacial Acetic Acid. I. M. KOLTHOFF, U. S. A. Friday, Sept. 14, 2:30 P.M. Problèmes actuels que présente la chimie analytique des traces de quelques éléments. F.
A COMPLETE SMALL ORGANIC CHEMISTRY LABORATORY B
Czechoslovakia.
8.
Tuesday, Sept. 11, 2:30 P.M. Gas-Liquid Chromatography.
Mikrobestimmung des Schwefels. M . VECERA.
H. SPITZY UND M. REESE, Austria.
Monday, Sept. 10, 2:30 P.M. L'analyse des systèmes macromoléculaires et colloïdales par quelques méthodes physicochimiques.
7.
M.
T H . BENEVENT,
ET S.
LISSITZIKY, France.
16.
Microchemical Techniques and Methods Applied to Problems in the Coal Industry.
17.
J. H. WOOD.
Microdétermination sélective des groupes alcoxy par chromatographie gaz-liquide. FRANÇOIS MARTIN SERGE VERTALIER, France.
18.
ET
Analysis of Fluorinated Organometallics. Determination of Fluorine and Silicon in Organic Fluorosilicon Compounds.
OTTO
SCHWARZKOPF AND
ROSF.MARIE HENLEIN, United States.
19. 20.
Die Schnellbestimmung von Magnesium im Eisen. R. REICHERT, Austria. Determination of Terminal Methyl Groups by Chromic Acid Oxidation. OTTO
21.
SCHWARZKOPF
AND
D.
D.
PHILLIPS, United States. Micromethods for the Examination of Petroleum.
A. R.
JAVES
AND M I S S
LIDDELL, England.
22. 23.
New Method for Isolation of Microgram Amounts of Thorium from Complex Mixtures. L. KOSTA, Yugoslavia. Arylthio semicarbazides for the Characterization of Aldehydes and Ketones. M. TISLER, Yugoslavia.
24.
Méthode de précipitation à pH constant des oxydes hydratés de fer et de manganèse. Application en microanalyse.
25.
MOTOHARU TANAKA, Japan.
Hidroxiderivados del trifenilmetano como indicadores de toriometria. R A FAEL ERNESTO LONGO, Argentina.
26. 27.
28.
Spot Tests for Cobalt and Sulfites Based on Induced Oxidation of Cobalt Azide Solutions. P . SENISE, Brazil. Application of the Dithizone Method to Estimation of Metal Impurities in the 10 to 6% Range in Highly Purified Antimony. E. HABERLI, Switzerland. Die Mikro-Molekulargewichtsbestimmung geloster Substanzen durch direkte Dampfdruckmessungen. H. GYSEL UND K. HAMBERGER, Switzerland.
29.
Détermination ultra-microanalytique du iode dans des liquides biologiques. M. C. SANZ,
T. BBECHBUHLER, ET I. J.
GREEN, Switzerland.
30.
Uber eine Méthode zur gleichzeitigen mikroanalytischen Bestimmung des C-, H-, und N-Gehaltes organischer Verbindungen mit einer Einwage. W, Schoniger, Switzerland. 31. Nova reacçào de gota especifica para a identificaçâo da quelina. A. J. C. RALHA, Portugal.
ANALYTICAL
CHEMISTRY
NEWS 32.
Microanalysis of Fluorocarbon Derivatives.
33.
C. A. RUSH, S. S. CBUIKSHANK,
AND E. J. W. RHODES, United States. Posibilités acidi- et alcalimétriques des sels mercuriques. R. MONTEQUI, A. DOADBIO, ET F. SANTISO.
34.
Kjeldahl Determination of Nitrogen. A Critical Study. Η. Α. ΜΟΚΕΝΖΙΕ,
35.
Australia. New Automatic Apparatus for the Semimicrodetermination of Carbon and Hydrogen in Organic Compounds. B.
R.
G. WAKE,
AND H.
S. WALLACE.
1.
Etude critique du dosage de la vitamine C dans diverses substances alimentaires.
2.
Une méthode de dosage des protéines dans les liquids biologiques. F . PENA-
B. V. CUVELIEB, Belgium.
4.
Alcalimétrie directe du tetraphénilborate du potassium en présence de clorure mercurique. R. MONTEQUI, A.
DTJCCI ET M. DUEANTÉ, France.
5.
DOADBIO, Y CARMEN SEBBANO, Spain.
37.
38.
39.
Neue mikroanalytische Verfahren zur Untersuchung isolierter Gefiigebestandteile in Stàhlen. W. KOCH, Germany. Anreicherung von Elementspuren. C.
41.
Die Bestimmung sehr geringer Borspuren in reinem Silizium. F. A. POHL, Germany. Mikrozonenschmelzverfahren fur organische Substanzen. H. SCHILD-
43.
Méthode de précipitation des oxydes hydrates au pH constant et ses applications en microanalyse. M. TANAKA, Japan. Automatic Microanalytical Apparatus for Gases in Metals. S. YANAGISAWA AND M. SEKI, Japan.
8.
Application de la polarographie au dosage du plomb dans le sang. R.
Titrimeter. EDWARD S. LANE, England. FABRE, R. TEUHAUT, ET C. BOUDENE,
9.
1.
H.
CHATEAU
ET M E E L E
AULT, B. LEMANCEAU, J E T . , JOUSSOT-
3.
Relation entre les potentiels de demivague et la constitution chimique de composés azoïques. L. MOELANTS ET
Dosage par polarographie des traces de cations lourds dans les vins. ROBEBT
13.
Method for Determination of Acetic
POINTEAU ET JEAN BONASTBE, France.
Anhydride. J. J. NICHOLLS AND T. ELLERINGTON, England.
14.
Obtention des potentiels d'oxydo-réduction dans des systèmes n'atteignant
15.
Détermination des constantes de dissociation des acides picolique et quin-
Contrôle quantitative de la neutralité de sels alcalins d'acides forts. JEAN BYÉ ET ANDRE KLEIBEB. France.
16.
L'analyse polarographique en séries aromatiques et heterocycliques. JEAN
17.
A Potentiostat for Electrogravimetric
TIEOUFLET, France.
ET
Analysis. J. F. HEEEINGSHAW AND P. F. HELFHIDE, England.
Potentiometric Titration of Weak Acids and Bases in Dilute Aqueous Solution. JOHN C. GAGE, England.
Dosage polarographique des aldehydes. M. ZWILLING, France.
JEAN MABC LAN-
aldique. JEAN CLAUDE MERLIN GERMAINE THOMAS, France.
5.
Constant Current Source for Automatic Coulometric Titrations. LLOYD Ε.
12.
R. JANSSEN, Belgium.
pas leur équilibre. DUCCI, France.
4.
DUBIEN, France.
B.
HEBVIER, France.
2.
Présentation d'un appareil électronique de mesures de susceptibilités magnétiques. Applications. ADOLPHE PAC-
SMYTHE, England.
Structure des complexes chloro-argentiques.
France. Phosphoric Acid as a Solvent and Base Electrolyte for Direct Inorganic Polarographie Analysis. G. W. C. MILNEB AND L. J. SLEE, England.
10.
11.
Electrical Methods
KNECHT, Germany.
42.
A 250-Mc. per Second High Frequency
Determination of the Different Chemical Forms of Sulfur Contained in Mucins.
ET V. FERNANDEZ, Spain.
MAHR, Germany.
40.
7.
M. ATJSTTJDILLO, F. SANZ, A. MUNICIO,
Causas de error en el microkjeldahl seguido de nesslerizaciôn. J. GONZALEZ CABEERO, O. CARBALLIDO RAMALLO, Y F. GOMEZ VIGINO, Spain.
Sur une nouvelle réaction colorée des flavanonols et quelques unes de ses applications. H. PACHÉCO, France. Spectrophotométrie après séparation chromatographique des colorants formés lors d'une réaction colorée. J. M. LAN-
Réduction à potentiel contrôlé du plutonium (IV). Application à son dosage par volumétrie. PIERRE REGNAUT ET JACQUES CORPEL, France.
ΚΛΝΟΑ.
3.
BOBRANSKI, Poland.
36.
6.
Biological Methods
18.
Coulometrie de 1 mg. uranium.
Y.
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ANALYTICAL
CHEMISTRY
BISHOP
NEWS ior of Weak Oxygen Acids in Inert and Weakly Basic Solvents. H. B. VAN
COURSIER, Y. HURE, ET C. CORMET,
Precious Metals
19.
Can Mean to You
France. New Method of Hydrogen Ion Activity Determination in Aqueous and Nonaqueous Solutions with the Reversible and Irreversible Electrodes. PANCE KIRKOV AND MARA DJONOVA, Yugo-
20.
QUALITY
DER HEIJDE, Denmark.
41. 42.
slavia. Réduction électrochimique de l'eau et des ions hydrogène. QUELINE, France.
COUPEZ
Studies on Coulometric Cerimentary in Organic Analysis. T. TAKAHASHI, Japan. Studies on Double Complexing Agents in Polarographic Analysis. Use of EDTA-Kon Base Solution. M. ISHIBASHI, Japan.
JAC-
Polarographic Determination of Semicarbazones. DAI.E M. COULSON, United 22.
S e
*v,Ce
States. Influence de la cinétique des réactions chimiques sur les courbes de polarisation. Application à l'étude des complexes thiocyanés du titrane(IV) et du titrane(III). S. TRIBALAT ET D. DELAFOSSE, France.
23.
Precise Intercomparison of Acids by Differential Potentiometric Titration with the Hydrogen Electrode. ROGER G. BATES AND EDWARD WICHERS, United
Optical Methods 1.
tometry. R. C. CHIRNSIDE AND J. E. STILL, England.
2.
LAMBLING, France. 25.
Coulometric Titration of Mono- and
3.
26.
RFORMANCE 27.
Conductivity of Sulfuric Acid in the 92-98% Range. KNUT FOSEN, Denmark. Uber den Einfluss organhcher Losungsmittel auf die polarographischen Halbstufenpotentiale und Stufenhohen organischer Depolarisatoren. K. SCHWABE, Germany.
Since its founding in 1842
28.
Adsorption and Current-Potential Char-
29.
TENBERG, United States. The Ilkovic Equation and Polarographic Current-Time Curves. H. A. Mc-
acteristics.
Bishop k n o w - h o w a n d craftsmanship have continuously contrib-
P. DELAHAT AND I. TRACH-
KENZIE, Australia.
uted to progress . . . in the l a b -
30.
oratory . . . in industry. When
you
UND W. F. GRUTTER, Germany.
need—Laboratory
Apparatus, Bimetals, Electrodes, Foil,
Precious Metal
Wasserbestimmung in anorgan. und organ. Ionenaustauschern. W. BUSER
31.
32.
States. Doseamento de uranio por oscilometria a radio-frequêneia. M. T. AGUAS DA SII.VA Ε A. F. X. MELLO COELHO.
33.
5.
Etude de la nioxime et dosage indirect
34.
pre-
cious metal fabricators. 35.
CATALOGS O N REQUEST.
P. S.
38.
J. BISHOP & CO. PLATINUM WORKS Malvern, Pennsylvania Telephone: Malvern, Pa. 3100 Circle No. 24 A on Readers' Service Card, page 51 A
24 A
39.
40.
Photometrische Nitratbestimmung mit A^-Methyldiphenylaminsulfosaure. J. KOMENDA.
C. DUVAL, France.
10.
Use of Infrared Spectrometry for Following High Temperature Kinetics.
11.
Application de la spectrographie infrarouge à l'analyse des rouilles. J. LOISEL, France. Determination of Vitamin D and Related Compounds. W. H. C. SHAW,
R. BURT AND G. J. MINKOFP, England.
12.
J. P. JEEPERIES, AND T. E. HOLT, Eng-
land. Etude micro-analytique des chlorates par absorption infrarouge. C. ROCCHICCIOLI, France.
15. 16.
Flame Spectrophotometry in Emission and Absorption. A. MENZIES, England. Application à l'analyse de papiers à phosphorescence organique. A. BERNANOSE AND M. COMTE, France. Uber eine neue Méthode zur hochselektiven qualitativen und photometrischen Bestimmung von Zirkonium. H. FLASCHKA, F. SADEK, UND M. Y.FARAH,
17.
HEIJDE AND E. A. M. F. DAHMEN, Hol
land. Sobre la subdivision conveniente de los métodos volumétricos y la determinacion del punto final en potentiometria. F. L. HAHN, Mexico. Hochfrequenztitration von Phenolen und Karbonylverbindungen in wasserfreien Lôsungsmitteln. K. J. KARRMAN, Sweden. Potentiometric Titrations in Nonaqueous solution. Anomalous Behav-
Application of Atomic Absorption Spectra to Chemical. A. WALSH AND
K N O P AND J .
TUTUNDZIC, Yugoslavia.
Potentiometric Titrations in Nonaqueous Solution. An Empirical Acidity Scale of Twelve Solvents. Η. Β.
AND J. BORECKY,
9. Applications minérales et organiques des spectres d'absorption infrarouges réalisés sur une goutte de solution aqueuse.
14.
Coulometrische Metallometrie.
CUTA
J. P . SHELTON, Australia.
8.
Solvents. W. SIMON AND E. BRONNER, Switzerland.
BRO.TO. Platinum and Platinum Group Metals Stainless Steel Tubing Tubular Fabricated Parts Spinnerettes
F.
ET J. SIGALLA, Brussels.
7.
13.
Mise au point d'une technique améliorée d'électrophorèse preparative continue sur papier filtre. A. PINHO DE
MIED-
Fluorometric Determination of 2-Naphthylamino-8-sulfonic, 2-Naphthylamino-7-sulfonic, 2-Naphthylamino-6sulfonic, and 2-Naphylamino-5-sulfonic Acids.
Fully Automatic Titration Unit for Microdetermination of Apparent Dis sociation Constants in Nonaqueous HEIL-
W.
Czechoslovakia. 6. La détermination spectrophotométrique d'oxydants et de réducteurs. Iodimétrie des solutions dilués. CL. HERBO
du nickel. P. E. WENGER, D. M O N NIER, ET W. BACHMANN, Switzerland.
ing a n d W i r e , call upon America's oldest a n d foremost
J. G.
WAGNER,
Die Bestimmung des Mineralbestandes und der analytischen Zustammensetzung von Mineralgemischen durch kombinierte Rôntgen-Beugung und Rontgenspektrographie. REICH, Germany.
NIKELLY AND W. D. COOKE, United
Catalysts,
Rhodium Plating Solutions, Tub-
Anodic Stripping Polarography.
J R . , AND W.
United States. Automatic Recording Spectrophoto metry Titrimeter. R. A. CHALMERS AND C. A. WALLEY, England.
4.
Dibasic Phenols. FRANTISEK CUTA AND ZDENEK KUCERA, Czechoslovakia. P E
Spectrophotometric Determination of Iron with 2-Fluorobenzoic Acid. Ε. Β. BUCHANAN,
States. Utilisation du potentiostat pour l'enregistrement des courbes de polarisation sur électrode de platine. J. BADOZ-
ACCURACY
Temperature Effects in Flame Pho-
18.
Egypt. Dosage colorimètrique du fluor dans les minéraux phosphatés par la méthode à l'alizarine zirconium. R. VIGIER, Afrique du Nord. Dosage par spectrographie d'émission ultraviolet, des éléments contenus à l'état de traces dans les composés minéraux. M. CHATELET, C. NICAUD, ET G. TRIDOT.
19.
Papierchromatographische Trennung und kolorimetrische Bestimmung von Santonin. M. R. TULUS UND A. ULUBELEN, Turkey.
ANALYTICAL
CHEMISTRY
NEWS 20.
Dosage des nitroalcanes par spectrographie infrarouge. C. FBÉJACQUES ET M. LECLERCQ, France.
21.
Spectres ultraviolets de dérivés carbonylés de la phénothiazine à carbonyle juxtanueléaire. Détermination de la position du groupe carbonyle substituant.
/fÎ^/Multi-Purpose Scintillation Detector With Optional Accessories..
G. CAUQUII., M. A. CASA-
DEVALL,
E.
CASADEVALL,
ET
M.
R.
GREZE. France. 22.
Reaction Mechanism of Anthrone with Sugars. T. MOMOSE, Y. UEDA, SAWADA, AND A. SUGI, Japan.
23. 24.
K.
Contrôle quantitatif par fluorescence des rayons. X. C. LEGRAND, France. Dosage de faibles quantités d'oxyde de carbone dans les gaz. J. LARNATJDIE ET M. LEFEBVRE, France.
25.
Confirmation par spectrographie infrarouge de la structure des produits de l'action des halogènes sur la 1-^4 anthraquinone.
26.
J.
DESCHAMPS ET λΐ.
Ρ ATY, France. Dosage du nitrile acrylique résiduaire dans ses polymères et copolymères. R. PIBAROT, France.
27. 28.
Dosage de traces de composés carbonylés. M. VAILLANT, France. A vitamina Κ nas sardinhas e na farinha de peixe. A. P. FORJAZ, L. BRITO, E L. MANSO, Portugal.
29.
Optional accessories include (A) %", (B) ^ * , and (C) well scintillation crystals. Large lead collimator (D) provides exceptional side shielding, accepts 20" flat field collimator (E) or special focusing collimator (F). Alpha and beta phosphors (G) are interchangeable with standard 1 " crystal.
Eine neue Méthode fur photometrische Mikrobestimmung von Cyaniden. I. KRALJIC UND M. MARGARETA, Yugo-
30.
slavia. Phosphorimetry,
a New Method of
FOR USE WITH STANDARD SCALERS OR GAMMA RAY SPECTROMETERS
Analysis. R. J. K E I R S , R. D. BHITT, JR., AND W. E. WENTWORTH, England.
31.
Doseamento espectrogrâfico de alguns lantanideos. M. R. GRADE, L. A L MEIDA, Β M. I. BARROS, Portugal.
32.
2,6 - Bis(4 - phenyl -2 - pyridyl) - 4phenyl-, and 2,6-Bis(6 - phenyl - 2pyridyl) - 4 - phenylpyridine. Their Spectrophotometric Constants in Re actions of Chelation with Fe(II), Cu(I), and Co(II).
33.
Standard probe is quickly converted into a scintillation well counter by changing crystals and adding inexpensive base and shielding.
G. F . SMITH AND A. A.
SCHILT, United States. Some Applications of X-Ray Fluores cence Analysis to Quantitative Analysis of Glass.
J. F. BACON AND V. POPOFF,
United States. 34.
Nophelometrische Bestimmung von Ca und Mg im Serum mit Na-Naphtalhydroxamat.
35.
G. BECK.
Die spektrophotometrische Bestimmung einzelner Komponenten in Gemischen von Pyrazol- und Salicylderivaten. C. WUNDERLT, Switzerland.
36.
Die UV-Spektrophotometrische Be stimmung des Wachstumregulators der 0-Naphtoxyessigsaure im Boden. J. MINCZEWSKI, Poland.
37.
Aplioaciones analiticas de la fenoxatiina y sus derivados. Determinacion espectrofométrica en el ultravioleta de la fenoxatiina.
38.
A.
39.
F . G. CAPITAN.
Analyse de verres optiques par autoabsortion atomique des raies spectrales. CAMTJNAS
ET M A . DOMING UEZ,
Spain. Flame Photometric Determination of Sulfate Ion. F. BURRIEL-MARTI, J. RAMIREZ-MTTNOZ, AND M. L. REXACH LIZARDUY, Spain.
40.
Interferences of Three Elements in Flame Photometry. F . BURRIELMARTI, J. RAMIREZ-MTJSOZ, AND M. C. A. OMARREMENTERIA, Spain.
41.
Dosage spectroquimique des antifrictions.
A. SAMPEDRO PINHEIRO ET A.
Spain. Sobre a presença do boro nos frutos. Ο método adoptado na sua determina-
ALVAREZ-ARENAS, 42.
çâo.
J. LAVOLLAY Ε J. J. NUNES DE
OLIVEIRA, Portugal. VOLUME
2 8, N O . 7, J U L Y 1 9 5 6
Easily accessible switch in housing permits changing from preamplifier output for scaler or ratemeter use to cathode follower output for gamma ray spectrometry work.
Nuclear-Chicago's new Model DS-5 is the first completely self-contained scintillation detector designed for basic counting or for the revolutionary techniques of gamma ray spectrometry, "pin-point" depth focusing, or source scanning. This is a unique instrument—providing unmatched performance for your present requirements and quickly convertible to the many new applications you'll face in the future. The most advanced scintillation counter on the market, the new DS-5 is inexpensive, reliable and easy t o operate. Write today for detailed specifications.
S P E C I F I C A T I O N S Crystal—Normally supplied with 1" χ 1" N a l ( T l ) crys tal. Other size crystals and phosphors optional. 1" χ 1}4" lucite light pipe. Crystal can be exposed directly in path of radiation. Phototube — DuMont 6292 protected by a magnetic shield. Shielding—Internal M " x 3" lead ring. External lead nose provides 13^ " or more of lead a t sides. Acceptance angle a t rear is less than 25°. Amplifier—New one-tube feedback amplifier provides gain of two and cathode follower positive output for spectrometer use; gain of 10 with negative output for normal use. Band width sufficient for 1 microsecond resolution. Provides pulse height limiting for spectrom eter use. Operation (with 1" χ 1» crystal)— Plateau: 250 volts; 2% slope/100 volts. Background: Crystal exposed—1250 cpm; with lead nose—160 cpm; with additional collimation—95 cpm. Detection efficiency (1 microcurie I'« a t 10 cm): 4400 cpm.
A ' L E A D NOSE ONLY B « 2 0 " LEAD COLLIMATOR C-FOCUSINC COLLIMATOR
Response Curve to I " '
nuclear - chicago NUCLEAR
INSTRUMENT
A N D CHEMICAL
CORPORATION
2 5 1 West Erie Street, Chicago 1 0 , Illinois LEADERS IN MAKING RADIOACTIVITY COUNT For further information, circle number 25 A on Readers' Service Card, page 51 A
25 A
Streamline laboratory procedures
NEWS
with these
43.
specialties
44.
Ο método absorciométrico na identifieaçâo de betumes asfâlticos. Influência dos seus constituentes. A. V. DE SEABKA, Portugal.
Determination of Titanium in Ilmenites by Differential Spectrophotometry.
17.
R. A. GUEDES DE CARVALHO, Portugal.
45.
La determinazione della composizione dei copolimeri ureamelammina-formaldeide mediante spettroscopia infra-
TON AND G. A. WELCH, England.
18.
rossa. E. BORELLO, G. D I MODICA, Ε V. NASINI, Italy.
LECOLUBE-for drilling rubber stoppers quickly and easily. Water-soluble! Available in 4-ounce bottles.
u
LECONAL — the perfect wetting agent for creating a flatter meniscus, for better glass float valve action, for cleaner burettes! ••7^,
46.
LECO mercury sweeper Recovers and salvages spilled mercury! Springactivated coil roller returns mercury to stainless steel catch-pan.
LECO magnetic spatula for weighing steel samples. ^" Finger-operated adjustment mag netizes or de-magnetizes spatula instantly. No wires or batteries.
Anwendung des Elektronenmikroskops fur analytische Zwecke. O. H. YV.
20.
KOHLSCHOTTER, Germany.
21.
Radiochemical Methods 1.
2.
Investigation of Chemical Separation Methods for Ca and Sr. Quantitative Determination of Both Elements in CaSr Mixtures by Isotopic Dilution
3.
23. 24.
Ν.
MEVEL
ET B.
LACRUCHE,
France. Application d'une méthode radiometrique. Determination du taux d'imprégnation d'un solide essore. Determination du coefficient de lavage.
G. PACKMAN, AND G. S. SPICER, Eng-
26.
land. Contribution au dosage de microquantités de SO4 à l'aide de soufre traceur.
9.
Pump water or corrosive liquids at varying flow rates. Plastic pump with stainless steel shaft.
10.
2. 3. 4. 5.
6.
France. Microdosages radiochimiques du chlore et de l'argent dans les sulfures de zinc ou de cadmium luminescents. M.
Wrife Today for Complete Technical and Descriptive Datai
LABORATORY EQUIPMENT CORP. St. Joseph 8, M i c h i g a n
26 A
16.
Utilisation des réactions d'échange isotopiques dans l'analyse micro- et ultramicrochimique des iodures organiques et minéraux. P. DAUDEL ET S. MAY, France. Nouvelle méthode de dosage de l'uranium, du radium, du thorium, et de
H.
IRVING AND D. MELLOR,
England. Réaction spécifique du mercure-I et structure du dimédon. COLETTE WADIER, France. Die letzten Fortschritte in der Komplexometrie. R. PRIBIL, Czechoslovakia. Relations entre la structure moléculaire et la formation de complexes avec l'anhydride tétrachlorophthalique. N. P. Buu-Hoi ET P. JACQUIGNON, France. Absorptiometric Determination of Uranium as Uranium (IV) Using l-(oArsonophenylazo) - 2 - naphthol - 3 , 6 disulfonic Acid (Thoronol). J. K. D.
Applications analytiques et biochimiques de la 6,8-dichlorobenzoylène urée. N. P. Buu-Hoi ET N. DAT-
8.
Analytical Applications of Organic Complexes Containing Pentacyanoferrate Group. ERNEST-FREDERICK
9.
Utilisation d'un dérivé de diacides trisubstitutés comme réactif analytique des ions N A + en présence des ions K A .
XUONG, France.
GEORGE HERINGTON, England.
c e r s . Ε. CANALS, R. MARIGNAN, ET L. BARDET, France.
i5.
Circle Nos. 26 A - 1 , 26 A-2, 26 A-3, 26 A-4, 26 A-5, 26 A-6, 26 A-7 on Readers' Service Card, page 51 λ
Etude du coefficient de perméabilité des membranes à l'aide des radiotra-
HONDA,
7.
BANCIE GRILLOT, France.
14.
M.
FOREMAN, C. J. RILEY, AND T. SMITH, England.
M. LEFEBVRE, C. BARET, ET L. PICHAT,
13.
MINAMI,
Photometrische Ti-Reaktionen mit Polyphenolen. A. OKÀC, Czechoslovakia. Steric Hindrance in Analytical Chemistry.
S. MAY ET P. MARTINELLI,
Contribution à l'étude des méthodes d'analyse de traces d'aldéhyde dans le chlorure de vinyle monomère au moyen d'aldéhyde marqué au carbone 14-C.
E.
Y. SASAKI, Japan.
Organic Complexes 1.
and Meteorites. A. A. SMALES, D. MAPPER, AND A. J. WOOD, England.
12.
United
Ion Exchange Separation of Fission Products.
France. Determination by Radioactivation of Small Quantities of Nickel, Cobalt, and Copper in Rocks, Marine Sediments,
chimique.
11.
LECO boron apparatus This exclusive new Leco apparatus is the perfect answer to highly-durable glassware for the A.S.T.M. boron method.
Microdosage de l'arsenic dans les pyrites par radiochimie. P. GAUTHIER, France. Quelques exemples d'utilisation du spectromètre à scintillation dans l'analyse
MEINKE,
Distinction analytique entre le neoprene et la gomme naturel par l'acth'ation avec neutrons. F. BARREIRA, Portugal. Zur Bestimmung der B-radioaktiven Eiemente Re, Te, und Lu und deren Zerfallsprodukte in Mineralien. C. W.
AND
P. GAUTHIER, France.
Adjustable flow pump
W.
HERR, Germany.
27.
ING, A. A. SMALES, AND J. SMIT, Eng-
9.
AND W.
States. Interaction of Beta Particles with Matter. Organic Compounds. D. C. MULLER, United States. Radioactivation Analysis of Cobalt in Plant Material. A. OIEN AND K. STEENBERG, Norway.
25.
Determination of Radiostrontium in Biological Materials. F. J. BRYANT,
land. 5. Microdosages par activation aux deutrons. PIERRE SUE, France. 6. Microdosage radiochimique des impuretés actives en luminescence minérale cristalline. E. GRILLOT, France. 7. Determination of Indium in Rocks and Minerals by Radioactivation. H. IRV-
Simple Liquid Scintillation Counter for Chemical Analysis with Radioactive Tracers. AV. SEAMAN, United States. Interaction of Beta Particles with Matter. R. H. MULLER, United States. Absolute Calibration of Sodium Iodide Crystals for Scintillation Spectrometry and Their Application to Reactor Analytical Problems. C. E. CROUTHAMEL AND E. R. RATHBUN, JR., United States. Separation of Radioactive Silver by Isotopic Exchange. D. N. SUNDERMAN
Application d'une méthode radiométrique. Dosage de traces de magnesium en presence de cations étrang-
N. MEVEL ET B. LACRUCHE, France.
4.
22.
Method. G. LELIAERT AND J. EECKHAUT, Belgium.
ers.
Etude chromatoradioautographique des produits de la radiodécomposition de composés organiques marqués par le radioiodide et en particulier des hormones thyroïdiennes. M. ROQUES ET S. LISSITZKY, France.
19.
bereich. R. FAUSS, Germany.
47.
LECO sampling gun — in a fraction of a second, draws a perfectly clean, uniform, oxidation-free sample into Pyrex tube for testing.
Eine kolorinietrische Titrationsmethode zur Pràzisionsbestimmung von absorbierenden Stoffen im U.V. Spektral-
l'actinium dans des particules fines de minérail radioactif. G. BECQUEREL, France. Rapid Separation and Determination of Radiostrontium and Radiocesium in Fission Product Mixtures. J. C. DAL-
F. SALMON LEGAGNEUR, France.
10.
Structure of Dithizone and Its Metal Complexes. H. IRVING, R. P. BELL, AND J. FERGUSON, England.
11. 12.
Dosages complexométriques de l'aluminium. R. GAUGUIN, France. Metal-Hydrogen Peroxide-EDTA
ANALYTICAL CHEMISTRY
NEWS
13.
Complexes and Their Use in Analytical
ques métaux
Chemistry.
MARTI, F. PINO PEREZ, DUCHEMIN, Spain.
ANDEKS
RINGBOM,
Fin-
land. Complexes et chelates métalliques de la dihydroxy-2-4-acetophenone. J. C.
23.
Metal-Organic Complexes of Analytical Significance. Stabilities of Complexes of Bivalent Cations with Anthranilic Acid and Its Derivatives. J. K. THOMPSON AND C. L. WILSON, Northern
15.
Ireland. Complexes ct chelates métalliques de l'alpha - phenyl - 2 - pyridine - methanol.
16.
24.
19.
Nouveau procédé de dosage volumétrique des alcoylsulfates alcalins à longues chaînes dérivés d'alcools pri-
25.
Complexometric Titrations with Potentiometric End Point Detection.
26.
Spectrophotometric Determination of Thallium with Malachite Green. P. W.
21.
Infrared Spectrum of Some Metal Chelates. J. R. BARCELO, Spain. Analytical Applications of Complexones. Colorimetric Determination of Vanadium.
22.
F.
BERMEJO
Some Recent Japanese Analytical Work Using Ion Exchange Resins. HIDETAKE KAKIHANA, TAKEO MURASE, KYYOSHI KATOU, AND SAYAKA KOJIMA, Japan.
Detection and Estimation of Nitrato and Nitro Complexes of Nitrosylruthenium in Aqueous Solution by Distribution and Paper Chromatographic
CHARLES N. REILLEY, United States.
Methods. J. M. FLETCHER, P. G. M. BROWN, AND A. G. WAIN, England.
WEST AND S. J. CLARK, United States.
27.
Zur Analytik freier Nucleotide.
Ein Beitrag zur Anwendung disubstitutierter Dithiocarbaminatverbindungen fur analytische Trennungen.
28.
Austria. Separation of Coordination Complexes by Column Chromatography. J. BJER-
Stability of Copper and Nickel Chelates of Some Phthalic Acid Derivatives.
29.
RIJM,
MARTINEZ,
Spain. Applications analytiques de la diphenyldithiourée comme un reactif de quel-
A. JENSEN, AND F . WOLDBYE,
Denmark. Papierelektrophorese kondensierter Phosphate. B. SANSONI, Germany. Gradient Elution Theory. E. C. FREILING, United States. Determination of Amino Acids by Ion Exchange Chromatography Using a Modified Moore and Stein Technique and an Improved Photometric Method.
Ο emprego das complexonas nas anâlises agricolas. L. A. VALENTE DE ALMEIDA, Portugal.
30.
O.
HOFFMANN-OSTENHOF UNO O . G A B R I E L ,
G. ECKERT, Germany.
Chelating Agents for Extraction of Lanthanide and Actinide Elements.
J. RENAULT ET J. A. GATJTIER,
France. Studies on Stability of Some Metal Chelates of Tiron. R. NASANEN AND J. VEIVO, Finland.
20.
ERDEM, Turkey.
K. YAMASAKI, Japan.
Sur les chelates de l'acide picolique.
maires.
Versuche zur Retentionsanalyse. BAHA
F. BUSCARONS AND F. NIETO, Spain.
R. A. PARIS ET G. THOMAS, France.
18.
Methods of Adsorption and Distribution
F.
Detection and Determination of Cu(II) with o-Benzidinemonosulfonic Acid.
W. HOLLINGSHEAD, England.
17.
AND J.
CARONS AND E. CASASSAS, Spain.
J. C. PARIAUD ET C L . TISSIER,
France. Studies on Oxine and Its Derivatives. Sensitivity and Selectivity of Some 7Substituted 8-Hydroxyquinoline-5-sulfonic Acids and Some 2-Substituted 8Hydroxyquinoline - 4 - carboxylic Acids toward Certain Metals. R. G.
F. BURRIEL-
Complex Compound Formation of Thioglycollic and Thiolactic Acids with Some Bivalent Metal Ions. F. Bus-
PARIAUD, France.
14.
nobles.
D. DURSSEN, Sweden.
S. JACOBS, England.
Detection and Identification of Phenols by Paper Chromatography. Water as Chromatographic Solvent. Ε. Α. Η.
Results and Statistical Interpretation 1. 2. 3.
De l'intérêt des calculs de corrélation dans l'interprétation des résultats d' analyse. Y. GRAFF, France. Résultats et considérations sur quelques tests mathématiques. B. V. J. CTJVELIER
ETPrecision H. KASTELIJN, Belgium. and Accuracy. A. H. DODD.
ROBERTS, England. 10.
Separation de polyphosphates par précipitation par divers composés organiques basiques et par chromatographie sur échangeurs d'ions. J. P. EBEL ET N. BUSCH, France.
THE FARRAND
(?)
Photoelectric
FLUOROMETER FOR FLUOROMETRIC METHODS of ANALYSIS Designed for stability and linear re sponse over a wide range of sensitivi ties, the Farrand Fluorometer provides precise, reliable measurements, especi
FARRAND OPTICAL CO. INC. Bronx Blvd. a n d E. 2 3 8 t h Engineering Research · Development Design · Manufacture
St., N e w York
FOCI
7 0 , Ν . Υ.
Precision Optics
ally for extremely low concentrations in micro or macro volumes. Descriptive Bulletin No. 803R, includ ing list of users, sent upon request.
Electronic and Scientific Instruments
For further information, circle number 28 A on Readers' Service Card, page 51 A
28 A
A N A L Y T I C A L
CHEMISTRY
NEWS 11.
New Chromatographic Methods for Routine Application in the Explosives Industry. J. W. ERSKINE AND A. F . WILLIAMS, England.
12.
Apparatus for Vapor Phase Chromatography. Analysis of Pyridine Homologs. Separation of the Isomers of Picoline.
J. BROOKS, W. MURRAY, AND
A. F . WILLIAMS, England.
13.
Gaschromatographie an gemischten Adsorbenten und mit Flussigkeit benetzten Tragern.
14.
JANAK JAROSLAV, Czecho-
slovakia. Méthodes de fractionnement et dosage des composés phosphores acido-solubles des végétaux.
15.
G. DUCET ET I. MENCL,
BAKER'S
NEW POLYGON-SH PLATINUM C
France. Étude des phosphates de calcium et de plomb. Analyse chromatographique. A.
BADINAND,
R.
MALLETN,
Patent applied for.
ET C.
\
CHARBONNIER, France.
16.
Column Procedure for Fractionation of Polymethyl Methacrylate. J. D. WIL-
17.
Utilisation de la chromatographic sur papier pour la caractérisation de l'aconitine à l'aide de ses dérivés. C. MATHIS
SON AND R. J. P. WILLIAMS, England.
ET P. DUQUENOIS, France.
IS.
Application of Partition Chromatography to Transuranic Elements with Particular Reference to Plutonium. M. K. ENGLISH AND J. K. FOREMAN,
19.
England. Méthode der quantitativen chromatopolarographischen Bestimmung der Mischungen der organischen Stoffe. Bestimmung der Nitroverbindungen.
Always a FLAT SIDE for safe lifting, without "crimping the edge.
Always a SPOUT for easy pouring.
W. KEMULA, Poland.
20.
21.
Aus den Untersuchungen auf dem Gebiete der Anwendung der Chromatopolarographischen Méthode zur Analyse der Gemische der organischen Verbindungen. W. KEMULA, Poland. Distribution elcctrophorétique des protides du sang en relation avec quelques états pathologiques. J. LABARRE ET
t.-jtr'
M. LAPOINTE, France.
(Continued on page 63 A)
ANALYST'S CALENDAR Gordon Research Conferences. New London, New Hampton, and Meriden, N. H „ July 2 to August 11. Sixth Annual Infrared Spectroscopy Institute. Nashville, Tenn., August 29 to September 2. Eleventh Annual Instrument-Automation Conference and Exhibit. Instrument Society of America. New York, September 17 to 21. Fifteenth International Congress of Pure and Applied Chemistry. Analytical Chemistry. International Union of Pure and Applied Chemistry, Lisbon, Portugal, September 9 to 16. Third Ottawa Symposium on Applied Spectroscopy. Ottawa, Canada, September 12 to 14. American Chemical Society. 130th Meeting, Atlantic City, N. J., September 16 to 21. American Society for Testing Materials. Second Pacific Coast national meeting, Hotel Statler, Los Angeles, Calif., September 16 to 22. Fourteenth Annual Pittsburgh Diffraction Conference. Mellon Institute, Pittsburgh, Pa., October 31 to November 2. Society for Experimental Stress analysis. Columbus, Ohio, November 1 and 2.
FLAT BOTTOM for greater stability.
TWO CAN BE LIFTED at one time.
N e w s h a p e i n c r e a s e s stability, s p e e d a n d e a s e of h a n d l i n g . With this new polygon-shaped platinum crucible Baker research and development make a major contribution to better laboratory techniques. The polygon crucible has been tested in actual laboratory applications and found far more useful and efficient. It retains its shape indefinitely, and is available with or without reinforced rim, in all standard sizes. The flat sides of the polygon extend only part way down; the balance is circular. Baker offers industry the most complete line of platinum laboratory ware, including all standard equipment, and facilities for custom manufacturing any special equipment required.
BAKER
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VOLUME
28, N O . 7, J U L Y 1 9 5 6
29 A
NEWS {Continued from page 29 A) '22. Subsidios para a identificaçào de aminoâeidos por cromatografia em papel. A, LTMA, Portugal.
2'Λ. Técnica para obstar à destruiçào de aminoâcidoM de eereais no seu estudo eromatogrâfico. A. LIMA, Portugal. 24. Cm método de destribuiçào ein papel para anâlise de corante.s alimentares. I. O. C. C. NKTTO, Portugal.
25.
Chromatographic inorganique sur papier. Étude de la variation de R/ avec la concentration de C1H en mélanges (1 -.1) /i-butanol + C1H. DE CARVALHO, France.
H. A. GUEDES
2i\. Quantitative Analysis with Thermal Conductivity Detection in Gas-Partition Chromatography. A. I. M. K K U L E M A K S , A . K w A N T E S , AND G . W .
A. RIJNDKR», Holland.
27.
2S.
Studies on Detection of Toxic Agents with Sorption Methods. H. HAGLUND, Sweden. Papierchromatographische und papierelektrophorctische Untersuolumg und Trennung der Système W/Mo, Nb/Ta und
2i).
Silikat-Phosphat.
E.
WITH THE 3 IN I
ARL QUANTOGRAPH
BLASIUS,
Germany. Die Verteilung von Polyjodiden zwischen wâssrigen Losungen und organischen Lôsungsmitteîn. R. BOCK, Germany.
Provides high-speed qualitative and quantitative analysis of miscellaneous samples by means of photographic recording of spectra; universal sequential, direct-reading analysis of virtually any element in any matrix; and finally, the highest speed, direct-reading analysis of similar types of sample for a semifixed group of elements. Any of these features can be provided in the initial instrument or easily added as the need arises. Whatever your analytical problems, you'll want full information on the Quantograph*, and on ARL's full line of optical emission and x-ray analytical instruments. Service and counsel are always available from an ARL field office near you.
General 1.
Nouvel appareil à combustion et techniques rapides pour le dosage de traces de soufre ou d'halogènes dans les gaz et les liquides organiques. F. MARTIN ET
2.
Sur une nouvelle forme de dosage iodométrique des sulfites ou des mélanges de sulfite, sulfate et sulfure
A. FLORET, France.
alcalins.
3.
H. N. TEREM ET A. ISNEL,
Turkey. Examen physico-chimique de quelques réactions analytiques. B. V. J. CUVE-
LIKR ET H. KASTELIJN,
4.
5. 0.
3 instruments in 1
Belgium.
Modern Instruments in Chemical Analysis at the Bound Brook, Ν. J., Plant of the American Cyanamid Co. W. SEAMAN, United States. Sur la décomposition des acides oxydrilés ou de leurs sels en phase aqueuse. R. \ritiiHR, Afrique du Nord. Nouvelles méthodes de dosage des mélanges binaires ou ternaires d'anhydrides sulfureux et sulfurique et d'hydrogène sulfuré duues dans l'air. G.
SPECTROGRAPH W i d e s p e c t r u m coverage · H i g h orders conveniently available · H i g h dispersion · Excellent resolution · Compact design s*V£ MONOCHROMATOR Photoelectric scan of s p e c t r u m · Sequential analysis of a n y element in a n y m a t r i x · S i m u l t a n e o u s line a n d background m e a s u r e m e n t s · R a t i o recording · T o t a l energy control
PANNETIER ET C. MELTZHEIM, France.
7.
Nouveaux indicateurs colorés, utilisables en milieu très basique. R. SCHAAL, France.
8. i).
Contribution à l'étude des équilibres complexes. J. LEPEBVRK, France. Graphische Auswertung zur Berechuung indirekter Analysen. Ε. Β.
POLYCHROMATOR S i m u l t a n e o u s analysis of m a n y elements · Highest speed operation · I n t e r n a l s t a n d a r d control · Highest precision
SCHWARZ, Austria.
10.
Sur une cause d'erreur dans le dosage par voie humide de l'azote dans les aciers spéciaux.
R. CASTRO, J. ALLE-
Please write to ARL for complete specifications a n d d a t a sheet.
MAND, ET R. POUSSARDIN, France.
11.
12. 13.
Reactions de l'oxyde de zinc avec les sels d'ammonium adsorbés pendant la précipitation mécanisme de formation de défauts de reseau. R. ROHMER, France. Contribution au dosage colorimétrique du Ρ2Ο5 dans les phosphates naturels et les engrais. R. MILLET, France. Graphische Auswertung indirekter An alysen bei verunreinigten, Zweistoffgeînischen. W. POSCH, Austria.
VOLUME
2 8 , N O . 7, J U L Y 1 9 5 6
'TRADE
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3723
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PARK
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PLACE
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H
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M
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MARK
Laboratories C
A
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GLENDALE
8,
Q
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C A L I F O R N I A -
NEW YORK . PITTSBURGH . DETROIT . CHICAGO . D A U A S . IOS ANGELES » LAUSANNE, Switzerland . LONDON En 9 lat>d
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For further information, circle number 63 A on Readers' Service Card, page 51 A
63 A
NEWS 14,
Dosage de traces d'impuretés dans les gaz par le diphénylsodium. ΝΙΝΙ, France.
15.
SYNTHETIC FIBER PAPERS
10. 17.
IS.
FOR
Chromatography and Special Fil t rati oris
20.
Crystallochemical Analysis and the Barker Index of Crystals. L. W. CODD, England. Recherches physico-chimiques sur les dérivés polyoxyéthyléniques purs. Possibilité d'applications analytiques. J. BOLLE, P. RAGON, ET T. JULLIG, France.
21. Application de la pyrohydrolyse au dosage du fluor dans les fluorures de thorium, d'uranium, et de plutonium. P. REGXAUT ET J. CORPEL, France.
Made from:
22.
POLYVINYLCHLORIDE CELLULOSE ACETATE ZEIN
AND OTHER MATERIALS
25.
27.
materials plus several other synthetic fibers.
28.
Some of the papers are resistant to strong
L. GORDON AND K. ROW-
LEY, England. Grundsâtzliehes uber die Lôslichkeitsprodukte. W. FEITKNECHT, Switzerland. Considerations sur les indicateurs classiques d'adsorption et nouvelles applications analytiques. F. SIERRA, Spain. Les indicateurs d'adsorption classe phenosafranine. F. SIERRA, Spain. Contribuiçâo para ο conhecimento das caracteristicas analiticas de algumas matérias primas nacionais. A. C. PEREIRA, Portugal.
29.
Some are not affected by normal organic
Un nuevo método para dcsificar cohre en lassoluciones de sus sales. A. LEPORE RUBINO, Uruguay.
30.
Each paper has one or
more properties not found in regular cellulose
Coprecipitation of Radium with Barium Sulfate.
have now been made from all of the above
solvents, while others are completely soluble
Application de la cinétique au dosage des ions éthoxyle dans des mélanges eaualcool-hydroxyde de sodium. C. PRÉVOST ET C. GEORGOULIS, France.
24.
26.
acids, some to strong bases, some to both.
Essais d'analyses minéralogiques quantitatives dans des mélanges d'oxydes de fer. libres ou combinés, par oxydoréductions sélectives. J. AUBRY ET P. VAYSSIEKE, France.
23.
Papers, real papers not mere filter mats,
in the same solvent.
L'analyse quantitative des aluminates de chaux. J. BARLOT, France. L'existence de l'anion silicate dans les eaux naturelles. A. H. CARVALHO, Portugal. Isolement et identification de l'hormone mélanophorodilatatrice (melanophoric stimulating hormone ou MSH) dans le placenta humain et dans l'urine de grossesse. II. DEVIS, Belgium. Détermination des constantes de stabilité des complexes béryllium-fluorure. R. GAVGUIN, France.
li).
TEFLON
A. ANTO-
Nuevo compuesto del cobre. Estudio de la oxidacion del reactivo de Fehling. A. LEPORE RUBINO, Uruguay.
31.
papers.
Etude sur la séparation des alcalinoterreuses par précipitation sous la forme de tartrates racémiques. A. SOUSA, Portugal.
Their possibilities with respect to chroma tography and special numerous to list here.
filtrations
32.
are too
W e are preparing a
33.
new booklet describing all of these synthetic fiber papers.
W e will be glad to send you
a copy as soon as they are ready.
Determination of Gaseous Elements in Metals and Refractory Materials. R. M. FOWLER, United States. Contribuiçâo para a resoluçâo do prolemadadeterminaçàodo teor efectivo de substancia termica cm curtidos de * 'curtimenta vegetal ' ' quando na sua curtimenta s&o utilizados curtientes azotados. J. PESSOA ROLAO, Portugal.
34.
Melting Curves (Temperature Heat Content Curves) as Criteria for Puritv. W. M. SMITH, Holland.
35.
H. REEVE ANGEL AND COMPANY
52 DUANE ST.
J. KNOTNERUS, Holland.
36.
INCORPORATED
NEW YORK 7, Ν. Υ.
Determination of Oxygen-Containing Functional Groups in Blown Asphaltic Bitumens and Similar Substances. Konfigurative Verknupfung von aChlorpropionsaure, /3-Chlorbuttersaure und
37.
2-Chlorpentan.
W.
SCHLENK,
Germany. Automatic Determination of Nitric Oxide in Coke Oven Gas. H. W. DEINUM AND W. I. HANSSEN, Denmark.
Circle No. 64 A on Readers' Service Card, page 51 A
64 A
(Continued on page 68A) ANALYTICAL
CHEMISTRY
LABORATORY SUPPLY CENTER
Specif,? LaMOTTE pH COMPARATORS for any part of p H range 0.2 to 1 3.6
- -—1 • Accurate
PREFERRED
from
