ANALYTICAL CHEMISTR Issued February 17, 1948
Copyright 1948 by American Chemical Society
Volume 2 0 , Number 2
EDITOR: W A L T E R J. M U R P H Y Assistant
Assistant to Editor: N . A . PARKINSON
Manuscript Editing: G . GLADYS GORDON
Associate Editor:
Manuscript Reviewing: STELLA ANDERSON
LAWRENCE T. HALLETT
Advisory
Editors
Executive Editor: JAMES M . CROWE
R. Κ. J. B. T. I.
Make-up: CHARLOTTE C. SAYRE
Contributing Editor: R. H . MÜLLER
EDITORIAL
95
Symposium on Purity and Identity of Organic Compounds Introductory Remarks R. B. Barnes
96
P. Κ. R. L. R. M.
CHAPMAN CHEN CHURCHILL CLARKE CUNNINGHAM KOLTHOFF
Board G . E. F. LUNDELL M . G. MELLON R. H . MÜLLER B. L. OSER W . J . SWEENEY H . H . WILLARD
O x i d e Films Formed on Titanium, Zirconium, and Their Alloys with Nickel, Copper, and Cobalt J . W . Hickman and E. A . Gulbransen
158
Thorium in Monazite Sand H . H . W i l l a r d and Louis G o r d o n
Philosophy of Purity and Identity of Organic Compounds Henry Eyring
98
Solubility Analysis and Problem of Purity . T. J . W e b b
100
Purity and Identity of Polymers
Herman Mark
104
F.D.Rossini
110
Systematic Multiple Fractional Extraction Procedures . . . M . T. Bush and P. M . Densen
121
Aromatics in Petroleum Fractions M . R. Lipkin, W . A . Hoffecker, C. C. M a r t i n , and R. E. Ledley
130
Pure Compounds from Petroleum
. . . .
Acidimétrie Determination of Aluminum
165
. . A . H . Bushey
169
P. D. Brass and D. G . Slovin
172
Identification of Crystalline Progesterone with 2,4-Dinitrophenylhydrazine Daniel Klein, Nathan Weiner, and S. M . G o r d o n
174
Latex Strainability Test
. .
MICROCHEMISTRY Boron Microdetermination in Fresh Plant Tissue . . . . H . W . Winsor
176
N O T E S O N A N A L Y T I C A L PROCEDURES
Identification of Small Amounts of Organic Compounds by Distribution Studies . L. C. Craig, Harold M i g h t o n , E l w o o d Titus, and Calvin Golumbic
134
Mercury Cathode Cell for Rapid Electrolysis F. T. Rabbitts
181
Mass Spectrometer—Hydrochlorination Analysis of Butènes F. W . M e l p o l d e r and R. A . Brown
139
Phosphoric A c i d Attack Method for Determination of Silicon in Aluminum Alloys . . . George N o r w i t z
182
Preparation of Silver for Use in Walden Silver Reductor . G . F. Smith and F. W . Cagle, Jr.
183
Symposium on Modern Methods of Analytical Chemistry L. T. Hallett
184
BOOK REVIEWS .
183
Determination of Sodium, Potassium, Aluminum, and Zinc in Derivatives of Carboxymethylcellulose . E. P. Samsel, S. H . Bush, R. L. Warren, and A . F. G o r d o n Quantitative Determination of Dicyclopentadiene . . . . Felix Bergmann and Helene Japhe
142
146
Removal of Metals at Mercury Cathode T. D. Parks, H . O . Johnson, and Louis Lykken
148
Capillary-Tube Viscometer . R. H . Wagner and John Russell
151
.
THE ANALYST'S CALENDAR
185
AIDS FOR THE A N A L Y S T
186
THE ANALYST'S C O L U M N
Application of Corrections in Viscometry of High-Polymer Solutions R.H.Wagner
155
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