analytical chemistry - American Chemical Society

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ANALYTICAL CHEMISTRY Volume 24, N o . 2 Issued February 1 8 , 1 9 5 2 Copyright 1952 by American Chemical Society

EDITOR WALTER J. M U R P H Y

EDITORIAL FOURTH

231

ANNUAL

REVIEW

OF

ANALYTICAL

Applications of Analytical Developments Coatings T. G . Rochow and R. W . Stafford

232

Nonferrous Metallurgy M . L. Moss

Food

237

Petroleum

266

P h a r l a L u ^ l s and Natural Drugs. . M . M . Marsh and W . W . H i l t y Natural and Synthetic Rubbers . . . Norman Bekkedahl Water Analysis. S. K. Love and L. L. Thatcher

271

J R .

Matchett and

H.

W.

von

Loesecke

Executive

Editor

James M . Crowe Assistant to Editor

Solid and Gaseous Fuels H . T. Darby Ferrous Metallurgy H . F. Beeshly

N. A. Parkinson Associate

Editors

Lawrence T. Hallett

CHEMISTRY

244 252

258

279 294

(End of Review Section)

TITRATIONS

IN

NONAQUEOUS

SOLUTIONS

Potentiometric Titration of Salts of Organic Bases in Acetic A c i d C. W . Pifer and E. G . Wollish

300

Charlotte C. Sayre

Titration of Certain Salts as Acids in Nonaqueous Solvents J . S. Fritz

306

Contributing Editor

Determination of Sulfa Drugs and Sulfonamides J . S. Fritz and R. T. Keen

308

Titrations in Nonaqueous Solutions (Round-Table Discussion) J . A . Riddick, J . S. Fritz, M . M . Davis, E. F. Hillenbrand, Jr., P. C. Markunas

310

G. Gladys Gordon Stella Anderson

R. H. Müller Assistant

Editors

Katherine I. Biggs Ruth Cornette Editorial

Assistants

M a r y R. Carls Betty V. Kieffer Doris L. Krout Advisory

Board

S. E. Q . Ashley P. J. Elving N. H. Furman D. M . Hume W . A. Kirklin S. S. Kurtz, Jr. H. A. Laitinen G o r d o n MacKinney C. J. Rodden J. W . Stillman G r a n t Wernimont Edward Wichers

T h i s M o n t h ' s C o v e r . A new high in automatic analysis of alloys has been achieved in laboratories of Aluminum Company of America with the use of quantometers and other direct reading spectroscopic instruments. Alcoa's J. R. Churchill, shown operating a production control quantometer, is one of the leaders of analytical revolution in which analyses of historical import are being replaced by on-the-spot analyses to permit continuous control during metallurgical processes. About 70% of determinations made in Alcoa's plants are handled by direct reading instruments. The one in the photograph automatically produces a written analytical report within two minutes of presenting the sample and will handle all determinations normally required commercially on aluminum alloys.

Titrimetry in Glacial Acetic A c i d P. C. Markunas and J . A . Riddick

31 2

Fatty A m i n e Products of High Molecular Weight D. E. Terry, K. R. Eilar, and O . A . M o e

313

Infrared Spectra of Steroids

315

William Tarpley and Cecelia Vitiello Correlation of Infrared Spectra H . L. M c M u r r y and V e r n o n Thornton

318

Infrared Absorption Band Due to Nitrile Stretching Vibration Robert E. Kitson and Norman E. Griffith

334

Theoretical Basis of Bouguer-Beer Law of Radiation Absorption F. C. Strong

338

Precision Colorimetry C. F. Hiskey and David Firestone

342

Thermistors for Cryoscopy of Air-Sensitive Materials P. D. Zemany

348

Freezing Points in Determination of Product Purity C. R. Witschonke

350

Qualitative Separations by Two-Way and Three-Way Electrochromatography . . . . H . H . Strain

356

Analysis of Mixtures of Carboxylic Acids J . D. Roberts and C. M c G . Regan

360

Determination of Carbon, O x y g e n , and Sulfur in Copper W . M . Hickam

362

Analytical Applications of Polarography of Molybdenum M . G . Johnson and R. J . Robinson

366

Determination of Nitrogen Philip McCutchan and W . F. Roth

369

2,9-Dimethyl-1,10-phenanthroline G . F. Smith and W . H . M c C u r d y , Jr.

371

Colorimetric Determination of Sodium Salts of Ethylenediaminetetraacetic A c i d . A l b e r t Darbey

. .

Factors Affecting Determination of Protein-Bound Iodine in Serum J . J . Moran Quantitative Determination of Raffinose in Mother Beets and Raw Beet Juices by Paper Chromatography R. J . Brown Determination of Geometric Surface Area of Crushed Porous Solids Sabri Ergun

373 378

384 388

(Continued on page 4 A)