J. BISHOP & CO. PLATINUM WORKS

France. 19. New Method of Hydrogen Ion Activity. Determination in Aqueous and Non- aqueous ... Delafosse, France. 23. ... radio-frequéncia. . T. Agua...
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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.

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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

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Adsorption and Current-Potential Char-

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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 -

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oratory . . . in industry. When

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UND W. F. GRUTTER, Germany.

need—Laboratory

Apparatus, Bimetals, Electrodes, Foil,

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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.

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Etude de la nioxime et dosage indirect

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pre-

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CATALOGS O N REQUEST.

P. S.

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J. BISHOP & CO. PLATINUM WORKS Malvern, Pennsylvania Telephone: Malvern, Pa. 3100 Circle No. 24 A on Readers' Service Card, page 51 A

24 A

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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,

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J. P. JEEPERIES, AND T. E. HOLT, Eng-

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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

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ET J. SIGALLA, Brussels.

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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

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ACCURACY

Temperature Effects in Flame Pho-

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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.

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Papierchromatographische Trennung und kolorimetrische Bestimmung von Santonin. M. R. TULUS UND A. ULUBELEN, Turkey.

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