ANALYTICAL CHEMISTRY Volume 20, No. 10
Issued October 20, 1948
Copyright 1948 by American Chemical Society
EDITOR: WALTER J. MURPHY Assistant to Editor:
Assistant
N . A . PARKINSON
Editors
Executive Editor:
JAMES M . CROWE
Manuscript Editing:
Associate Editor:
LAWRENCE T . HALLETT
Manuscript Reviewing:
C o n t r i b u t i n g Editor:
R. H . MÜLLER
Make-up:
885
Basic Aspects of X-Ray Absorption in Quantitative Diffraction Analysis of Powder Mixtures
Leroy Alexander and H. P. Klug
886
F. L. English
889
Titanium D. F. Adams Polarographic Determination of Iron . Louis Mettes Electrolytic and Polarographic Determination of Zinc in Thorium J. H. Patterson and C. V . Banks
891 895 897
Speetrophotometric Determination of Iodine W. G. Gross, L. K. W o o d , and J. S. McHargue
900
Photometric Determination of Arsenic in Copper and Copper-Base Alloys . O . P. Case Measurement of Carbon 14
902
J. D. Roberts. Winifred Bennett, E. W. Holroyd, and C. H. Fugitt
904
Precision Determination of Lead in High Grade Copper . . Louis Silverman
906
Analysis of Sulfite Waste Liquor and Lignosulfonates J. R. Salvesen and David Hogan
909
Viscosity Blending Relationships of Heavy Petroleum Oils M . H. Rahmes and W. L. Nelson
912
Rapid Determination of Sulfides, Thiosutfates, and Sulfites in Refinery Spent Caustic Solutions J . H . Karchmer and J. W. Dunahoe
915
P-Aminobenxoic Acid and Its Sodium Salt
919
Colorimetric Determination of Certain Alpha, Beta-Unsaturated Aldehydes R. B. Wearn, W. M . Murray, Jr., M. P. Ramsey, and Nelladeane Chandler
922
D. F. Clausen and J. H. Shroyer
925
Chemical Analysis of Refinery C& Hydrocarbon Fractions R. F. Robey and H. K. Wiese Glucose G. H. Benham and J. E. Despaul
926 933
Determination of Tetraethyl Pyrophosphate in Mixtures of Ethyl Phosphate Ester» M . N . Dvornikoff and H. L. Morrill
935
Gravimetric Determination of Thallium with Tetraphenylarsonium Chloride * W. T. Smith, Jr.
937
Determination of Alkyl Sulfides and Disulfides Sidney Siggia and R. L. Edsberg
Advisory R. P. C H A P M A N Κ. Κ. CHEN J. R. CHURCHILL B. L. CLARKE T. R. C U N N I N G H A M I. M . KOLTHOFF
Elimination Maxima of Certain Saturated Cholesterol Esters G. L. Fletcher, Michael Insalaco, J. G. Cobler, and H. C. Hodge
938 939 941 943
Quantitative Colorimetric Microdetermination of Methanol with Chromotropic Acid Reagent R. N . Boos Electron Microscope Goniometry . . . A . F. Kirkpatrick and E. G. Davis Volumetric Determination of Microgram Quantities of Acid-Soluble Sulfur L. P. Pepkowitz Spectrochemical Determination of Beryllium Jacob Cholak and D. M . Hubbard Determination of Oil in Petroleum Waxes J. S. Wiberley and J. B. Rather, Jr. Microscopical Distinction of Corundum among Its Natural and Artificial Associates. G. C. Crossmon
Modified Apparatus for Determination of Groups Active to Grignard Reagent P. M . Maginnity with J . B. Cloke Semimicrodetermination of Arsenic in Presence of Antimony, Bismuth, Tin, and Lead J . H. Freeman and W, M . McNabb Seltlimiero Molecular Still I. A . Breger Simple Electronic Reflux Ratio Timer H E . Fisher Fluorocarbon Vapor Balance J. H. Simons, W. H. Pearlson, and W. A . Wilson Elimination of Nitrite Interference in lodometric Sugar Determinations . . Julian Coraan Removal of Oxygen from Gas Streams . Louis Meites and Thelma Meites Electron Microscope Society of America International Congress on Analytical Chemistry
949 951 955 958 962
964 965 968 970 972 976
947
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, from 20th and Northampton Sts-, Easton, Pa. Executive Offices and Editorial Headquarters, 1155 Sixteenth St., N . W., Washington 6, D. C. Advertising Office: 332 West 42nd St., N e w York 18, Ν. Υ. Branch Editorial Offices: Chicago 4, III., Room 819, 25 East Jackson Blvd.; Hous ton 2, Tex., 413 West Bldg.; N e w York 17, 60 East 42nd St., San Francisco 2 , Calif-, Room 454, 760 Market St. Entered as second-class matter at the Post Office at Easton, Pa., U.S.A., February 18, 1948, under the Act of March 3, 1879, as 12 times a year monthly on the 15th. Acceptance for mailing at special rate of postage provided for in Section 1103, Act of O c t . 3, 1917, authorized July 13, 1918.
978 979 980 982 983 984 984
F. A . Hamm
990
R. H. Muller
993
A . H. W. Aten
994 985
CRYSTALLOGRAPHY D A T A
986
BOOK REVIEWS
987
CORRESPONDENCE
989
THE ANALYST'S CALENDAR
995
AIDS FOR THE A N A L Y S T
Determination of Dinitrotoluene in Smokeless Powder by Titanous ChlorideBuffer Method P. G . Butts, W. J. Meikle, John Shovers, D. L. Kouba, and W. W. Becker
948
MICROCHEMISTRy
SCIENTIFIC C O M M U N I C A T I O N S
Spectrographs Determination of Boron in Plant Tissue F. M . Smith, W. G. Schrenk, and H. H. King
G. E. F. LUNDELL M . G. M E L L O N R. H . MÜLLER B. L. OSER W. J. SWEENEY H. H. WILLARD
Determination of Nitro Nitrogen in Nitroguanidine and Cyclolrimethylenetrinitramine D. L. Kouba, R. C. Kicklighter, and W. W. Becker Determination of Potassium Perchlorate in Smokeless Powder W. B. Meldrum, Jr., R. A . Clarke, D. L. Kouba, and W. W. Becker Determination of Phenol and m-Cresol in Complex Biochemical Mixtures . Benj. Warshowsky, E. J . Schantz, with M . W. Rice Determination of Malt Sirup Density . . . R. H . Fosnot and R. W . Haman Determination of Water Vapor R. H . Cherry Gas Thermometer for Automatic Control of Low Temperatures . . . . D. D. Tunnicliff
Third National Instrument Conference and Exhibit
Determination of Moisture in Lecithin and Crude Soybean Oils Κ. Μ . Brobst
Board
NOTES O N A N A L Y T I C A L PROCEDURES
.
C. J. Kern, Thomas Antoshkiw, and M . R. Maiese
Molybdenum Blue Reaction
STELLA ANDERSON
CHARLOTTE C. SAYRE
EDITORIAL
Polarography
G . GLADYS G O R D O N
996
THE ANALYST'S C O L U M N
25 A
INSTRUMENTATION
29 A
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