NEWS
Precision Instruments Highlighted A t Pittsburgh Conference PITTSBURGH.—Among attractions at t h e Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy [ANAL. C H B M . , 2 6 , 4 2 3 - 6 (1954)] was an
outstanding exhibit of scientific equip ment, ranging from t i n y glassware t o 2-ton control equipment. A recording spectrometer featured by Leeds & N o r t h r u p , is designed for multiplier phototube detection in t h e s p e c t r u m range of 2100 t o 7000 A. T h e meter combines t h e speed of electronic spectral-line-intensity recording with t h e high resolution of a grating m o n o chromator. Employing a single-pass, single-mirror autocollimating system, t h e E b e r t - t y p e monochromator has a sharp image, since all object-to-image distances are equal. T h e basic design eliminates most aberrations inherent in t h e use of several mirrors or multiple reflections t o a t t a i n comparable resolu tion. T h e 30,000-lines-per-inch grating is r o t a t e d by a precision m o t o r drive for continuous scanning of t h e spectrum, or may be manually positioned b y counters m o u n t e d on t h e grating drive. A selected multiplier p h o t o t u b e con v e r t s t h e light energy of a spectral line into electrical energy, which is t r a n s m i t t e d t o a recorder. Microphotomcters or other photographic densitymeasuring devices are n o t needed. A high light of t h e Fisher Scientific exhibit was a spectrophotometer re corder developed by W a r r e n Elec tronics—a double-beam continuous re cording u n i t for D U - t y p e monochromators. T h e two wave-length ranges cover 215 t o 375 a n d 350 t o 750 τημ. Scanning t i m e is 1.5 t o 12 minutes. Use of photomultiplier t u b e s results in the full resolution a n d accuracy in herent in t h e monochromator. All sample cells from 10 m m . square t o 100 m m . cylindrical now used in D U instru ments fit into t h e precision cell holders of t h e unit. A new recording spectrophotometer displayed b y A r t h u r H . T h o m a s Co., Beckman Model D R , automatically measures and records percentage t r a n s m i t t a n c e in t h e 220- t o 1000-πΐμ region. T h e average cycle t i m e is 8 seconds per point for one sample, 10 for two, and 12 for three. T h e sample cell c o m p a r t m e n t accommodates four rectangular 1-cm. cells a n d two cylindrical cells u p to 10 cm. in p a t h length. One, two, or t h r e e samples can b e measured a n d recorded in one cycle, each curve plotted in a different color. A new mass spectrometer, Model 2 1 610, displayed by Consolidated Engi neering, is t h e industrial c o u n t e r p a r t of 22 A
t h e laboratory model, designed pri marily for process monitoring a n d con trol. I t can precisely monitor a single component in a gas stream continuously or several components alternately. A preselected group of masses can be automatically scanned by a n aecessory programer. A n y fragment from mass 12 t h r o u g h 40 can be monitored with satisfactoryseparation between adjacent masses. Where separation is n o t i m p o r t a n t , t h e range is extendable t o mass 80. Moni toring of hydrogen or helium can be , provided b y adding an accessory mova ble s h u n t to t h e analyzer magnet. T h e signal o u t p u t is provided b y a stabilized linear a.c. amplifie)' system t h a t elim inates zero drift. Electron bombard m e n t a n d acceleration of molecular frag m e n t s a r e controlled by electronic cir cuits which minimize variations in t h e mass spectra resulting from changes in operating characteristics. Bausch & L o m b gave its first showing of a new dual-grating spectrograph. T h e two gratings, each 50 X 110 m m . , can be rotated independently t o pro vide two separate wave-length ranges. Focal length of t h e system is 2 meters. T h e spectrograph has a first-order dis persion of 4 A. pei· m m . a n d a secondorder dispersion of 2 A. per m m . An x-ray Q u a n t o m e t e r designed for production control was featured by Ap plied Research Laboratories. I t can
be used for high-speed, precision chemi cal analysis where x-ray fluorescence techniques are applicable. Applications include analysis of major constituents in complex alloys, ores, a n d concentrates where elements range in atomic n u m b e r from 21 t o 92. Dispersive analyzers, using fiat, single crystals, a r e adjustable over t h e range of 9 ° t o 50° in Bragg angle. W h e n lithium fluoride crystals are used, t h e spectral range is 0.6 t o 3.1 A. Once t h e crystal a n d receiver have been set, an external a d j u s t m e n t through ± 5 ° in Bragg angle allows pre cise a d j u s t m e n t t o t h e desired spectrum line. Consolidated Engineering's Titrilog records hydrogen sulfide, sulfur dioxide, mercaptan, thiophene, a n d organic sul fide a n d disulfide concentrations as low as 0.1 p.p.m. or 0.005 grain per 100 cubic feet. Compounds of specific interest m a y be determined separately. T h e i n s t r u m e n t records n o t only an average of concentrations for a given period b u t also peaks and valleys, af fording, a complete p e r m a n e n t record. A 9 0 % response t o a change in sample concentration is reached within 30 seconds. A senior-model ionograph, offered by Precision Scientific, has stepless control of voltage from 0 t o 2500 volts with available current rated a t 25 m a . T h e paper strips maintain t h e same wetness. Gas is allowed t o exhaust t h r o u g h t h e electrolyte chambers t o remove heat and carry away electrode products t h a t might contaminate t h e atmosphere over t h e strips. T h e strips can be as
Part of the exhibition of chemical equipment at the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy
ANALYTICAL
CHEMISTRY
NEWS short as 3 inches or as long as 30 inches. T h e ionograph can be plugged into a n y 1 Ιό-volt, 50/60-eycle service outlet. T h e flame photometer exhibited b y Baird Associates determines concentra tion of sodium, potassium, calcium, or lithium. T h e sample is atomized a n d fed into a gas flame, where ionization of t h e desired element produces light a t a characteristic wave length. Through selective filters, light of this wave length is allowed t o fall upon a barrier-layer photocell, whose electrical o u t p u t is connected t o a galvanometer. T h e in s t r u m e n t is designed for use with city gas, b u t appropriate burners are availa ble for bottled propane or b u t a n e . An internal s t a n d a r d automatically cancels t h e effect of variations in gas pressure and sample flow rate. High sensitivity permits detection of as little as 0.004 meq. per liter. T h e simplicity of opera tion allows very rapid work, on a mini m u m volume of 2.5 m l . of diluted sample.
New York 17, N . Y . T h e discussion on April 7 is on "Conformational Analysis," b y Richard B . Turner, Rice I n s t i t u t e .
Lindberg Engineering displayed i t s new laboratory combustion-tube fur nace, T y p e CF-4SA, which accom modates one combustion t u b e with an outside diameter of 4 t o 5 inches. T h e furnace consists of a steel shell, in sulated with 3000° F . insulating brick. Over-all dimensions are 26 X 19 X 19.8 inches. T h e m a x i m u m continuous o p erating t e m p e r a t u r e is 2750° F . , reached in about 3 hours with a 4000-watt i n p u t . A m e t e r for determining percentage of hydrogen and t h e hydrogen-to-carbon ratio in hydrocarbons was featured b y Central Scientific. T h e beta-ray H / C meter uses t h e absorption of b e t a rays from t h e radioactive decay of strontium-90. W h e n these rays collide with electrons t h e y a r e slowed down or a b sorbed. T h e degree of absorption is directly related t o t h e electron density of t h e sample. As hydrogen h a s a greater n u m b e r of electrons per gram t h a n a n y other element, t h e i n s t r u m e n t can tell immediately t h e ratio of h y d r o gen t o t h e other elements present. T h e hydrogen content of a liquid hydrocar bon is determined from t w o measure ments—beta-ray absorption a n d specific gravity. Hydrogen can be determined by a laboratory technician in a b o u t 5 m i n u t e s w i t h a n accuracy of ± 0 . 0 2 weight % .
T h e purpose of t h e conference is t o relate some of t h e methods of statistics to t h e practical applications of actual experiments in t h e chemical laboratory. T i m e is allowed on t h e program for dis cussion following each paper.
Mechanisms of Organic Reactions The
N e w York
AMERICAN
CHEMICAL
Section
of
the
SOCIETY is p r e
senting a series of discussions related to recent developments in t h e field of mechanisms of organic reactions, held Wednesday evenings through April 21 a t t h e Union Carbide a n d Carbon Corp. Building, 30 E a s t 42nd St., 24 A
Statistical Design Of Experiments T h e Milwaukee Section of t h e A M E R I CAN C H E M I C A L SOCIETY is to hold a con
ference on t h e statistical design of ex periments a t t h e Plankinton Hotel, Mil waukee, Wis., April 2 3 . T h e sessions will s t a r t a t 3 P.M., with dinner a t β : 30 P.M., followed b y an evening ses sion. Basic Concepts of the Statistical Design of Experiments. W. J. YOUDEN, National Bureau of Standards. Practical Applications of the Statistical Design of Experiments. W. L. GORE, K. t. du Pont de Nemours & Co., Inc. Statistics in Chemistry. The First Ten Years. K. A. BBOWNLEE, University of Chicago.
ANALYST'S CALENDAR American Chemical Society. 125th N a tional Meeting, K a n s a s City, M o . , M a r c h 23 t o April 1. Sixth Annual Conference on Electronics and Nucleonics in Medicine. American I n s t i t u t e of Electrical Engineers, Insti t u t e of Radio Engineers, a n d I n s t r u m e n t Society of America. Hotel N e w Yorker, N e w York, Ν . Y\, N o v e m b e r 19 a n d 20. Second Annual Instrumentation Confer ence. Louisiana Polytechnic I n s t i t u t e , R u s t o n , La., April 8 a n d 9. Electrochemical Society. Electronics. L a Salle Hotel, Chicago, 111., M a y 2 to 6. American Association of Spectrographers. Symposium on Direct Reading E m i s sion Spectroscopy. Chicago, 111-, M a y 7. American Petroleum Institute, Division of Refining. Rice Hotel, Houston, Tex., M a y 10 t o 13. Symposium on Molecular Structure and Spectroscopy. Ohio S t a t e University, J u n e 14 t o 18. Sixth Annual Oak Ridge Summer Sym posium on Modern Analytical Chem istry. O a k Ridge, Tenn., August 23 t o 27. Fourth Annual Research Equipment Exhibit. N a t i o n a l I n s t i t u t e s of H e a l t h , Bethesda, M d . , M a y 24 to 27. Ninth Annual Microchemical Symposium, M e t r o p o l i t a n Microchemical Society. Standardization of Microchemical A p p a r a t u s a n d M e t h o d s . Brooklyn Col lege, Brooklyn, N . Y . , M a r c h 19 a n d 20 American Crystallographic Association. Spring meeting, Mallinckrodt Chemi cal L a b o r a t o r y , H a r v a r d University, Boston, Mass., April 5 t o 9.
Scientific Apparatus Makers Association T h e 36th annual meeting of t h e Scien tific A p p a r a t u s Makers Association will be held a t t h e Broadmoor, Colorado Springs, Colo., M a y 2 to 7. T h e t e n t a tive schedule of sessions is: May 2. Section executive Committee Meetings, beginning with luncheon. May 3. Business meetings of sections. May 4. Morning, annual business meeting. Afternoon, public information program. May 5. Session of manufacturers and distributors. May 6. Morning, session of manufac turers and distributors. Afternoon, board of directors luncheon. Evening, annual dinner. T h e principal speakers are t o be Clar ence E . Manion, former dean of t h e University of N o t r e D a m e Law School, who recently resigned his post as chair m a n of t h e Congressional Committee on Intergovernmental Relations; Dexter M . Keezer, vice president a n d director, D e p a r t m e n t of Economics, M c G r a w Hill Publishing C o . ; D . C. Hooper, manager, m a r k e t planning, Westinghouse Electric Corp. ; Charles F . H o n e y well, administrator, Business a n d D e fense Service Administration, D e p a r t ment of Commerce; M . M . Olander, di rector of industrial relations, OwensIllinois Glass C o . ; a n d Richard W. Wright, manager, M o u n t a i n States E m ployers Council, I n c . T h e T u e s d a y afternoon session will be highlighted b y t h e annual L a b o r a t o r y A p p a r a t u s a n d Optical Sections Public Information Panel, when authorities from t h e fields of nuclear energy a n d public health will discuss "Science's D e b t t o t h e Toolmaker."
Division of Refining, American Petroleum Institute T h e Division of Refining of t h e Ameri can Petroleum I n s t i t u t e h a s planned 12 technical group sessions a n d an open dinner session for t h e 19th M i d y e a r Meeting, t o be held a t t h e Rice Hotel, Houston, Tex., M a y 10 t o 13. T h e sessions on analytical research will be held M a y 10, with t h e following pro gram : Morning C. E . H e a d i n g t o n ,
Presiding
O p e r a t i o n of a P e t r o l e u m R e s e a r c h Analytical L a b o r a t o r y . W . C. S C H A E PERMEYER
AND E .
S. S M I T H ,
Union
Oil C o . of California, Brea, Calif. D e t e r m i n a t i o n of M e r c a p t a n s b y an Amperometric Method. M . D . GRIMES,
J.
E.
PUCKETT,
AND B.
J.
N E W B Y , Phillips P e t r o l e u m Co., B a r tlesville, Okla. ANALYTICAL
CHEMISTRY
NEWS 0:15—13.
H i g h Efficiency Laboratory Frac tionating Equipment. J . C. W I N T E R S
Mass Spectrometry
AND
T h e Second Annual Meeting of A S T M Committee E-14 on M a s s Spec t r o m e t r y is scheduled for M a y 25 t o 28 a t t h e J u n g Hotel, N e w Orleans, La. William Priestley, Jr., S t a n d a r d Oil Development Co., P . O. Box 121, Lin den, N . J., is chairman of t h e P a p e r s and Programs C o m m i t t e e . W. S. Young, Atlantic Refining Co., Philadelphia 45, Pa., is chairman of C o m m i t t e e E-14. T h e following program h a s been propared :
R.
A.
DINERSTEIN,
Standard
Oil C o . ( I n d i a n a ) , Whiting', I n d . N e w Techniques for Analyzing M i x tures of Trace M e t a l s . R. M . S H E R WOOD
AND F .
W.
CHAPMAN,
The
A t l a n t i c Refining C o . , P h i l a d e l p h i a . Pa. Hydrogen Sulfide Analyzer-Re corder.
E . B . O F P U T T A N D L . V. S O R G ,
S t a n d a r d Oil C o . ( I n d i a n a ) , W h i t i n g . Ind. Micro Distillation M e t h o d s for Analysis of Petroleum. A. R. J A V E S , C.
LlDDELL,
AND W .
H.
THOMAS,
A n g l o - I r a n i a n Oil Co., L t d . , S u n b u r y o n - T h a m e s , Middlesex, E n g l a n d . A R e d u c e d Scale R e i d Vapor P r e s sure Apparatus. R . L . L E T O U R N E A U , J.
F.
JOHNSON,
AND W.
H.
Monday, May 24 8:30 Opening. J. HIPPLE, Presid ing 0:00— 1. New Development in Process Control Mass Spectrometers. C F . ROBINSON AND L. G. HALL.
ELLIS,
California R e s e a r c h Corp., R i c h m o n d , Calif. Determination of Water in Acetald e h y d e b y Infrared Spectroscopy. J . A. F A V R E A N D J . B . B U T L E R , P h i l
lips P e t r o l e u m Co., Bartlesville, Okla.
(
.):30— 2. Performance of the Nonmag netic Radio-frequency Mass Spectrometer. T . C. WHERRY A N D F . W. Κ Λ Κ \SEK.
F. W. M C L A F F E R T Y .
9:45—14.
Mass Spectral Study of Cycloparaffins in a Petroleum
10:30—15.
Structural Correlations of the Mass Spectra of Alkylben-
Wax.
zenes.
11:00—16.
11:30—17.
R. J. Askevold,
R. A. BROWN, Presiding
90° Mass Spectrometers with Heated Inlet Systems. V. J.
2:30—19.
Identification of Compound Types in a Heavy Petroleum
OALDEOOURT.
Gas Oil. II. E . LUMPKIN AND Β. Η. JOHNSON.
3:15—20.
Analysis of a Narrow-Boiling Heptene Fraction of Poly meric Origin by Combi -ed Mass Spectrometric and Ad sorption Techniques. R E.
3:45—21.
Analysis of Bubbles in Glass.
4:15—22.
Equilibrium Constant, Infra red Spectra, and Thermody namic Properties of Bromine
Session developed b y C . E . H e a d i n g t o n , A t l a n t i c Refining C o . , Philadel phia, P a . Tetraethyllead in Gasoline. R e v i e w of Analytical M e t h o d s . C. M .
11:15— 5. Performance and Application of Ion Resonance Mass Spectrometer. K. P . LAN-
J A N S E N A N D C. R. H O D G K I N S , S t a n d
a r d Oil D e v e l o p m e n t C o . , L i n d e n , N.J. Determination of Trace Amounts of Iron, Nickel, and Vanadium on Catalysts by X-Ray Fluorescence. G . V. D Y R O F F A N D P . S K I B A ,
11:45— (Î. High-Sensitivity Mass Spectrometer Leak Detector. T.
KEY
A N D G.
D. HOGAN,
12:30
VICH and B. W. STEINER.
2 : 3 0 - S. Determination of Excess Kinetic Energy in Appearance Potential Measurements. R.
Wednesday, May 26 Mass Spectrometer Clinics. Consolidated Engineering Corp. General Electric; Co. ASTM 10-14Main Meeting
8:30 to 3:30 4:00
Thursday, May 27
J. KANDEL.
3:00— i). Positive and Negative Ions in the Monohalomethane Mass Spectra.
R. M. R E E S E , V.
H. DlBELER, MoHLEli.
3:45—10.
AND F .
A. E. CAMERON. Presiding
8:30—23.
Mass Spectrographic Analy sis of Solids. Ν. Β. H A N -
9:00—24.
Iridium Filaments for Vapor izing Solids. H. M. ROSEN-
L.
Electron Energy Distributions and Ionization Probability Curves. T. K.IELDAAS, JR.
4:15—11.
Detailed Structure in the Ionization Probability Curves of CO, N2, C3H6, and CeH». R. E. F o x AND W. M.
NAY.
STOCK, J. It. SITES, It. B A L DOCK, AND C. M E L T O N .
9:30—25.
ô:00
Subcommittee 2. Theoretical and Fundamental Aspects. F . L. Mohler, Chairman. Subcommittee 3. High Molecular Weight and Solids Technique. M. J. O'Neal, Chairman.
L. L. G E N T , C. P . M I L L E R , AND R. C.
E . B . C H I L D S A N D J . A. K A N E H A N N ,
Socony- V a c u u m L a b o r a t o r i e s , I n c . , Brooklyn, Ν . Υ.
J. CLERC, A. HOOD, AND M. J. O ' N E A L , JR.
J.R. SITES, H. M.
ROSENSTOCK, It. AND C. MELTON.
10:45—27.
BALDOCK
Electron Bombardment Ion Source for Mass Spectrom etry of Solids. A. E. CAM ERON.
11:15—28.
Metal Vacuum Lock for a Mass Spectrometer. G R.
11:35—29.
Research on Mass Spectra of Nonvolatile Compounds. P .
FULTZ.
Tuesday, May 2S Mass Spectrometric Analysis of High-Molecular-Weight Saturated Hydrocarbons. R.
J. R. SITES.
Rapid Multicomponent Microassay.
BRADT AND F . L. M O U L E R .
R. A. FRIEDEL, Presiding
8:30—12.
Inorganic Compound Identi fication.
10:00—26.
IIlCKAM.
Oil C o r p . , W i l m i n g t o n , Calif. Spectrographic Analysis of P e t r o l e u m Products and Related Materials.
26 A
Subcommittee 4. Methods and Data and Nomenclature. H. M. Kelly, Chairman. Subcommittee 5. New In struments and Techniques. II. F . Wiley, Chairman.
R. E. HONIG, Presiding
Richfield
POMATTI, T h e Texas Co., Beacon, N.Y. Application of t h e Logarithmic S e c tor to Semiquantitative Spectrographic Analysis of P e t r o l e u m A s h R e s i d u e s .
5:00
ASTM E-14 Executive Committee Meeting.
2:00— 7. Molecular Structure and Behavior of Molecules under Electron Impact. J. TURKE-
H . C. MATTRAIT,
C F . PACHUCKI, AND X. ,1. HAWKINS.
M I L L E R , R. C. HOFFMAN, AND A. P . GIFFORD.
Stand
a r d Oil D e v e l o p m e n t C o . , L i n d e n , N.J. N o n m e t a l Analysis of Micro Q u a n tities of Solids b y M e a n s of t h e E m i s s i o n Spectrum. E . L . G U N N , H u m b l e Oil a n d Refining C o . , B a y town, Tex. Spectrographic M e t h o d s for Ana lyzing Lubricating G r e a s e s . C. W .
Chloride.
NEAU, L. LANE, AND K. J. VICK.
G A M B R I L L A N D S U E A. G E N E R N A L I K ,
Ethyl Corp., Detroit, Mich. Rapid Colorimetric M e t h o d for Phenyl-1-Naphthylamine in N e w and U s e d Oils. W . S. L E V I N E , SoconyV a c u u m L a b o r a t o r i e s , I n c . , Brook lyn, Ν . Υ . Spectrochemical Determination of Copper in Crankcase Drainings. J .
PRICE. B. J. TODD.
DONNER.
Presiding
Correlations of Mass Spectra of Ketones through C13. A.
2:00—18.
W. A. MORGAN
10:30— 4. R-F Linear Deacceleration Mass Spectrometer. W.
S. MEYERSON.
Analysis of High-MolecularWeight Alcohols by the Mass Spectrometer. R. A.
G. SHARKEY, J.. L. SCHULTZ, AND R. A. F R I E D E L .
A,\'D G. JERNAKOFF.
Afternoon
R. A. B R O W N .
BROWN, W. S. YOUNG, AND N . NICOLAIOES.
10:00— 3. Engineering Aspects of the Ion Resonance Mass Spec trometer.
Analytical Applications of High Temperature Mass Spectrometry to Chemistry.
L. K U L P , Presiding
2:00—30.
Isotope Abundances of Chlo rine from Various Sources. H. R. O W E N SCHAEFFER.
ANALYTICAL
AND O.
A.
CHEMISTRY
NEWS 2:30—31.
Variation in the Natural Abundance of Isotopes of Stable Elements. A. E .
3:15—32.
Vaporization Studies of Ger manium and Silicon in t h e Mass Spectrometer. R. E.
4:00—33.
Two-Stage Magnetic Ana lyzer for Measuring Isotope Abundance Ratios Greater
CAMERON.
HONIG.
than 104.
F . A. W H I T E AND
T . L. COLLINS.
4:25—34.
Determination of Absolute Isotope Abundances of Strontium by Thermal Ioni zation of Strontium Salts on Tantalum and Other Fila ments.
4:50—35.
L. F. HERZOG.
Program to Establish Refer ence Standards of Isotopic Abundance.
F . L. MOHLER.
Stability in t h e Mass Spec trometer Ion Source and Gas Flow System. L. A. DlETZ.
Mass Spectrometer Effusiometer. ANT,
9:30—38.
J.
M.
as an
Κ. Β. BRY MOCRKA, AND
J. ZlNN. Stability in the Mass Spec trometer Ion Source and Gas Flow System. J. G. HUTTON AND G. P . SCHACHER.
10:15—39.
Inlet System for Control of Samples of Gas Analyzed by a Mass Spectrometer. SHTJ-
10:35—40.
Capabilities of a Dual-Pur pose Mass Spectrometer. A.
FORD S O H U H M A N N .
F. GBBHART, J. K. WALKER, AND M. F . F R E C H .
11:05-41.
Ionization Chamber Life.
Rearrangement Peaks in Mass Spectra in C13—Cen trally Labeled Neopentane.
2:30—43.
Hydrogen Exchange Studies in Free Radical Mechanisms.
3:00—44.
Ion Formation
R. E. VARNERIN.
in
C6-Ci5
Mono-olefins. R. A. BROWN AND ELEANOR
GILLIAMS.
New Punched Card Filing System for Mass Spectra. F. W. M C L A F F E R T Y AND R. S. GOHLKE.
4:15—46.
Determination of Hydrocar bons in Hydrogen by a Pal ladium Tube-Mass Spec trometer Method. R. A. BROWN, H. B. OGBURN, F . W. MELPOLDER, AND W. S. YOUNG.
Symposium on Instrumentation At t h e Symposium on I n s t r u m e n t a tion, to b e held a t t h e University of Michigan, A n n Arbor, Mich., M a y 24 t o 27, William G. Fredrick, Detroit D e p a r t m e n t of Health, chairman of t h e symposum, will deliver t h e opening ad dress entitled "Concepts of t h e S y m posium." Philip Drinker, professor of 28 A
GEORGE D. CLAYTON, U. S. Public Health
Service. Home-Assembled
Instruments.
AL
FRED N. SETTERLIND, Illinois Department of Public Health, AND WARREN A. COOK, KNOWLTON J. CAPLON,
consultant. Instruments for Measuring Sound and Vibration.
CHARLES R. WILLIAMS, Lib
erty Mutual Insurance Co. Instruments for Measuring Radiations.
KARL
Z.
Ionizing
MORGAN,
Oak
Ridge National Laboratory. Instruments for Measuring Ultraviolet, Visible, and Infrared Energy. HUGH ARCHER, Archer-Reed Co.
Papers presented a t t h e symposium will be published in a n illustrated ency clopedia-type book, which will include b o t h review a n d technical papers a n d d a t a supplied b y instrument makers. Information is available from Director, Continued Education, 109 South O b servatory St., A n n Arbor, Mich.
Symposium on Molecular Structure and Spectroscopy
C. P . JOHNSON AND A. L A N GER.
3:45—45.
tional Hygiene, Boston. Instruments Specifically Designed for Atmospheric Pollution Evaluation.
Service
J. A. E S T E S .
F. L. MOHLER, Presiding
2:00—42.
HERVEY B . ELKINS, Division of Occupa
and Metering Air.
R. E. Fox, Presiding
9:00—37.
Instrumentation of Industrial Hygiene Sampling and Analyzing Air for Con taminants in Work Places. LESLIE SILVERMAN, Harvard University. Laboratory-Type Instruments of Specific Application to Industrial Hygiene.
University of Michigan. Instruments for Measuring Air Velocity
Friday, May 28 8:30—36.
industrial hygiene a t H a r v a r d , will be t h e dinner speaker. I n addition t o 19 technical papers, reviews of areas of instrumentation of industrial hygiene will be given.
T h e Symposium on Molecular Struc t u r e a n d Spectroscopy will be held a t t h e D e p a r t m e n t of Physics a n d As tronomy, Ohio State University, J u n e 14 t o 18. I t will include discussions of t h e interpretation of molecular spectro scopic d a t a as well as methods for o b taining such d a t a a n d phases of spec troscopy of current interest. F u r t h e r information is available from H . H . Nielsen, D e p a r t m e n t of Physics a n d Astronomy, Ohio S t a t e University, Columbus 10, Ohio.
Sugar Analysis T h e eleventh session of t h e I n t e r n a tional Commission for Uniform M e t h ods of Sugar Analysis is t o be held in Paris, France, J u n e 9 t o 14. President of t h e commission is Frederick Bates, National Bureau of Standards, Wash ington, D . C. T h e following subjects will be discussed: Determination of Raffinose. Referee, H. C. S. de Whalley. Determination of Reducing Sugars. Referee, E. J. McDonald. Color and Turbidity of Sugar Products. Referee, T. R. Gillett.
Reflectance of Solid Sugars. Referee, J. C. Keane. Standard Tests for the Performance of Adsorptive Aids. Referee, V. R. Deitz. Tests for the Evaluation of the Refining Qualities of Raw Beet Sugar. Referee, F . Baerts. Determination of Sugar in Sugar Beets. Referee, Η. Hirschmiiller. Determination of Ash Content of Sugar Products. Referee, J. Dubourg. Determination of Factors Causing De terioration of Raw Sugar in Storage. Referee, H. E. C. Powers. Values for Clerget Divisor and Methods for Multiple Polarization. Referee, F . W. Zerban. Analysis and Evaluation of Refined Sugars. Referee, G. P. Meade. Testing of Molasses and Sugar Sirups. Referee, J. G. Maltby. Humidity in Relation to Sugar. Ref eree, D. Gross. Determination of Metallic Contaminators in Refined Sugars. Referee, R. Saun ier. Determination of D r y Substance in Sugar and Sugar Products. Referee, A. H. Rheinlander. Tests for the Evaluation of the Crystalizing Qualities of Refinery Liquors. Ref eree, A. Brieghel-Miiller. Reduction of the Lead Error in Polariz ing Raw Sugars. Referee, L. Eynon. Specifications and Tolerances for Pure Materials Used in Sugar Analysis. Ref eree, L. Eynon. Starch Hydrolysis Products. Referee, W. R. Fetzer. Constitution and By-laws. Referee, Frederick Bates. Determination of Nonsugar Compo nents, Other Than Metallic, in Sugar Products. Referee, P. Honig. Refractive Indices of Sugar Solutions. Referee, C. F . Snyder. Standardization of Quartz Control Plates. Referee, E. Einsporn. Determination of Viscosity and Surface Tension of Sugar Solutions. Referee, A. Van Hook. Tests for Evaluation of the Refining Qualities of Raw Cane Sugar. Referee, H. I. Knowles. Weighing, Taring, Sampling, and Classi fication of Sugars. Referee, F . M Chap man.
Instrumentation in Water and Waste Treatment T h e Conference on I n s t r u m e n t a t i o n in Water, Sewage, a n d Industrial Waste T r e a t m e n t a t M a n h a t t a n College, N e w York, Ν . Υ., will b e held on Tuesday, April 20, n o t on April 22 as previously announced.
X-Ray Diffraction School T h e semiannual x-ray diffraction school of t h e N o r t h American Philips Co., 750 South Fulton Ave., M o u n t Vernon, Ν . Υ., will be held April 19 t o 23. Subjects discussed include basic principles of x-ray diffraction, x-ray dif fraction applications, use of Geiger counter diffractometer, use of t h e x-ray spectrograph, a n d field reports on cur rent research with x-ray diffraction. ANALYTICAL
CHEMISTRY
NEWS
Industrial Spectroscopy Boston College has announced a spe cial 2-week intensive course in modern industrial spectroscopy from July 12 to 23. The course is particularly de signed for chemists and physicists from industries in the process of installing spectrographs equipment. Informa tion on the course can be obtained from James J. Devlin, S.J., Physics Depart ment, Boston College, Chestnut Hill 67, Boston, Mass.
Instrumental Chemical Analysis Two special summer programs in instrumental chemical analysis to en able chemists in industry and govern ment laboratories to study the applica tion of new instrumental techniques and methods in applied analytical chemistry will be given at the Massachusetts Institute of Technology, Aug. 16 to 20 and Aug. 23 to 27. The first will deal with electrical methods and the second with optical methods. Both programs will be under the di rection of David N . Hume and Lockhart B. Rogers, who are in charge of the institute's Instrumental Analysis Lab oratory. Tuition for each program will be $100. Further information is avail able from the Summer Session Office, Room 7-103, Massachusetts Institute of Technology, Cambridge 39, Mass. Other summer programs at M I T in clude technique and applications of infrared spectroscopy, transistors and their applications, analog computation, and digital computers.
involved in the analyses. The 24 cat ions commonly selected by most au thors are considered. Tests for 28 anions are given. In addition, direc tions for the systematic analysis of solids for both cations and anions are presented. The reviewer is most impressed by the following points: Thioacetamide is used as a source of hydrogen sulfide; many excellent review questions and problems follow each chapter; all equa tions used in the schemes of analysis and all the reactions of the anions and cations are summarized in clear, read able tables; many tables for prepara tion of reagents and of constants useful in the theory are included in the 15 appendexes; and a very complete index is given. The reviewer notes, however, the lack of any redox theory (this is pre sumed to have been covered in general chemistry); the use of many organic reagents for confirmatory tests (most students have not had organic chemistry by the time they take qualitative anal ysis); and the adherence to the usual 24 cations in spite of the present impor tance of such elements as beryllium, titanium, molybdenum, vanadium, and tungsten. The line drawings, binding, and print ing are excellent. This book should serve as a very useful text.
LYNNE L. MERRITT, J R . , Indiana
University, Bloomington, Ind. This revised edition employs the pres sure bulb method of filtration intro duced in the first edition, but directions also allow the use of the centrifuge or filter paper if one so desires. There are three introductory chapters giving an excellent review of calculations in volving molarity, normality, equivalent weights, balancing equations, and defi nitions of terms. Two more chap ters concern general aspects of labora tory work. There follow 20 chapters giving the actual laboratory directions with preliminary experiments for each group, the analytical procedure for each group, and a discussion of the equilibria
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