INDUSTRIAL and ENGINEERING CHEMISTRY - ACS Publications


INDUSTRIAL and ENGINEERING CHEMISTRY - ACS Publicationshttps://pubs.acs.org/doi/pdf/10.1021/i760151a700VOLUME 18, NUMBER...

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INDUSTRIAL AND ENGINEERING CHEMISTRY ANALYTICAL EDITION I S S U E D M A R C H 29, 1946

V O L U M E 18, N U M B E R 3

CONSECUTIVE NUMBER 6

EDITOR: W A L T E R J . M U R P H Y Associate Editor:

Assistant to Editor: N. A . PARKINSON

LAWRENCE T. HALLETT

Contributing Editor: R. H . MÜLLER

Assistant Editors Manuscript Editing:

Manuscript Reviewing:

G . GLADYS GORDON

Advisory

STELLA ANDERSON

T. R. CUNNINGHAM G. E. F. LUNDELL M. G. MELLON

R. P. C H A P M A N J. R. CHURCHILL B. L. CLARKE

Boiling Range of Chlorinated Hydrocarbons

Dwight Williams

157

Amperometric Titration of Mercaptans with Silver Nitrate I. M. Kolthoff and W. E. Harris 161 Determination of Tungsten in Silicate Rocks . Ε. Β. Sandell

Make-up: CHARLOTTE C. SAYRE

Board R. H. MÜLLER B. L. OSER H. H. WILLARD

Determination of Tocopherol in Plant Tissue M o n r o e E. W a l l and Edward G . Kelley

198

Method of Evaluating Metal Cleaners Samuel Spring, H o w a r d I. Forman, and Louise F. Peale

201

Fluorometric Attachment for Beckman Spectrophotometer Mary H . Fletcher, Charles E. W h i t e , and M i l t o n S. Sheftel

204

163 MICROCHEMISTRY

Equations

of

Viscometer

Thixotropic

Breakdown

for

Rotational

. . . Henry Green and Ruth N . Weltmann

Measurement of Small-Angle X-Ray Scattering

167

Spectrophotometric Determination of Traces of Nickel . . O. R. Alexander, Edith M . Godar, and N . J . Linde

172

Amperometric Microtitration of V e r y Dilute Chromate Solutions J. M. Kolthoff and D. R. May 208

. . . .

M . H . Jellinek, Ernest Solomon, and I. Fankuchen Polarographic Determination of Acetaldehyde Philip J . Elving and Emile Rutner

176

Determination of Beryllium in Ores . . . Mary H . Fletcher, Charles E. W h i t e , and M i l t o n S. Sheftel

184

Quantitative Determination of Ergosterol, Cholesterol, and Frances W . Lamb,

Alexander M u e l l e r , and George W . Beach

209

Modified All-Dithizone Method for Determination of Traces of Copper . S. L. Morrison and Harriet L. Paige

211

N O T E S O N A N A L Y T I C A L PROCEDURES

Determination of Inorganic Phosphorus in Plant Materials . .

7-Dehydrocholesterol

Rapid Estimation of Rubber in Guayule Latex Disper­ sions R. T. Whittenberger and B. A . Brice

179

» W . A . Pons, Jr., and John D. Guthrie

206

187

Simple Automatic Control for Vacuum Systems . . . . J . J. Spadaro, H . L. E. V i x , and E. A . Gastrock

214

Absorption Spectrum of Antimony Trichloride-Ergosterol Reaction Product Alexander Mueller

214

Large-Size Laboratory Soxhlet Extractor Ralph Salkin and Irving A l l a n Kaye 215

N e w Method for Determination of Manganese James J. Lingane and Robert Karplus 191

B O O K REVIEWS

216

Fractional Separation of Hafnium and Zirconium by Means of Triethylphosphate

. H . H . W i l l a r d and Harry Freund

195

The American Chemical Society assumes no responsibility for the statements and opinions advanced by contributors to its publications. Views expressed in the editorials are those of the editors and do not necessarily represent the official position of the American Chemical Society.

Published by the American Chemical Society at Easton, Pa. Editorial Headquarters: 1155 16th Street, N . W., Washington 6, D. C ; telephone. Republic 5 3 0 1 ; cable, Jiechem (Washington). N e w York Editorial Branch: 60 East 42nd Street, N e w York 17, N. y . ; telephone, Murray Hill 2-4662. Chicago Editorial Branch: Room 819, 25 E. Jackson Blvd., Chicago 4, Ill., telephone, Wabash 7376. Business Office: American Chemical Society, 1155 16th Street, N . W., Washington 6, D. C. Advertising Office: 332 West 42nd Street, N e w York 18, N . Y.> telephone, Bryant 9-4430. Entered as second-class matter at the Post Office at Easton, Pa., under the Act of March 3, 1879, as 24 times a year—Industrial Edition monthly on the 1st, Analytical Edition monthly on the 15th. Acceptance for mailing at special rate of postage provided for in Section 1103, Act of October 3, 1917, authorized July 13, 1918. Remittances and orders for subscriptions and for single copies, notices of changes of address and new professional connections, and claims for missing numbers should be sent to the American Chemical Society, 1155 16th Street, N . W., Washington 6,

Instrumentation in Analysis

. . R. H . M ü l l e r (Advt. Sect.)

29

We acknowledge with thanks the action of J. T. Baker Chemical Co. in releasing the front cover of this issue for editorial purposes. Copyright 1946 by American Chemical Society. 37,200 copies of this issue printed.

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