ANALYTICAL CHEMISTRY Volume 2 6 , N o . 8
EDITOR WALTER J. MURPHY
Issued August 16, 1954
Copyright 1954 by the American Chemical Society
EDITORIALS
1257
Determination of Olefin Group Types E. L. Saier, Abbot Pozefsky, and N . D. Coggeshall
1258
James M. Crowe
Accurate Analysis with Infrared Double-Beam Spectrophotometer Robert Schnurmann and Fdward Kendrick
1263
Science Editor
Graphical Absorbance-Ratio Method for Rapid Two-Component Spectrophotometry Analysis R. C. Hirt, F. T. King, and R. G. Schmitt
1270
Lawrence T. Hallett Production
Detection and Estimation of Melamine in Wet-Strength Paper by Ultraviolet Spectrophotometry R. C. Hirt, F. T. King, and R. G. Schmitt
Executive Editor
Manager
. . . .
1273
Joseph H. Kuney
Automatic Mass Speetrometric Analysis B. F. Dudenbostel, Jr., and William Priestley, Jr.
1275
Associate Editors Stella Anderson G . Gladys Gordon Bertha Reynolds Charlotte C. Sayre Ruth Cornette
Spectrophotometry and Polarographîc Determinations of Soluble Silicate M. A. DeSesa and L. B. Rogers
1278
Thiocyanate Spectrophotometric Determination of Molybdenum and Tungsten C. E. Crouthamel and C. E. Johnson
1284
Polarographîc Determination of Maleate Unsaturation in Polyesters
1291
E. W. Hobart Assistant Editor Katherine I. Biggs Editorial Assistants Betty V. Kieffer Sue R. Peter Ruth C. Laubach Veronica O'Keefe Dolores M. Federico Fern S. Jackson Ruth M . Howorth
Polarographîc Determination of Molybdenum(VI) E. P. Parry and M. B. Yakubik
1294
Polarographîc Determination of Dissolved Oxygen in Dilute Sulfite Waste Liquor H. S. Levine and O . J. Williams
1297
Polarographîc Determination of Tungsten in Rocks L. E. Reichen
1 30Î
Radioactivity Assay of Water and Industrial Wastes with Internal Proportional Counter L R. Setter, A. 5. Goldin, and J. S. Nader
1 304
Quantitative Radiochemical Method for Determination of Major Sources of Natural Radioactivity in Ores and Minerals * , , , . , . , , , , , , , . J. N. Rosholt, Jr.
1307
Continuous Recording of Concentration of Organic Matter in Waste Water Richard Ki'eselbach
1312
R. H. Müller
Studies with N-Halo Reagents P. F. Kruse, Jr., K. L. Grist, and T. A . McCoy
1319
Advisory Board S. E. Q. Ashley H. F. Beeghly G . E. Boyd A. Q . Butler N . H. Furman W . W . Hilty D. N. Hume Robert Kunin S. S. Kurtz, Jr. J. J. Lingane Gordon MacKinney V. A. Stenger Grant Wernimont P. W . West J. H. Yoe
Titration of Bismuth with Ethylenediaminetetraacetic Acid A. L. Underwood
1322
Estimation of Rubber in Asphalt Geert Salomon, Elizabeth Pezarro-Van Brussel, and A, C. van der Schee
1325
Determination of Germanium in Coal, Coal Ash, and Flue Dust. W. J. Frederick, J. A. White, and H. E. Biber
1 328
Anthrone in Estimation of Hexose Sugars with Special Reference to Pentose Interference Ronould Johanson
1331
Determination of Diphenylmercury Alone in Presence of Phenyl Mercuric Compounds V . L. Miller and Dorothy Polley
1333
Contributing Editor
This Month's Cover.
The
mountain states area and Kennecott copper can be justifiably proud this month as the company's new research center is dedicated. Located on the University of Utah's campus at Salt Lake City, these facilities will be an important addition to the research facilities of the area. The company apparently has spared no effort or expense to provide excellent housing and equipment for the technical staff. The principal objectives of this research center appropriately will be the effective coordination and expansion of the research activities of Kennecott Js four western mining divisions. At the same time it is reasonable to assume that the university and the community will benefit greatly by having the research center and its staff in their midst. For further details of the laboratory see pages 29 A and 31 A
Separation of Platinum and Palladium and Their Subsequent Colorimetric Determination with p-Nitrosodimethylaniline J. H. Yoe and J. J. Kirkland
1 335
Spectrophotometric Study of p-Nitrosodimethylaniline as Sensitive Colorimetric Reagent for Platinum . . . J. J. Kirkland and J. H. Yoe
1 340
Colorimetric Determination of Zinc and Copper with 2-Carboxy-2'-hydroxy-5'-sulfoformaiylbenzene R. M. Rush and J. H. Yoe
1345
. .
Automatic Differential Potenti ο metric Titrator H. V . Malmstadt and E. R. Fett
1348
Automatic Recorder for Continuous Determination of Oxygen in Gases Using Dropping Mercury Electrode Τ. Β. Larchar, Sr., and Michael Czuha, Jr.
1351
Testing Cationic Surface Active Germicides for Use in Industrial Water Systems C. H. Bollenback and G. A. Cruickshank
1 355
Miniature Mixer Settler for Continuous Countercurrent Solvent Extraction H. W. Alter, J. W. Codding, and A. S. Jennings
1 357
Anodic Polarographîc Wave of Vanadium(IV) Aged in Alkaline Solution I. M. KolthoFf and P. T. Toren
1361
New Solvent System for Separation of Amino Acids by Paper Chromatography R. A . Clayton and F. M . Strong
1 362
Calculation of Integral Attenuation Index between 400 and 700 Millimicrons and of Corresponding Wave Length for Filtered Raw Sugar Solutions F. W. Zerban and Louis Sattler
1 363
Hydrolysis of Polysaccharides by Cation Exchange Resin and Identification of Monosaccharide Components by Paper Chromatography R. E. Glegg and David Eidinger
1 365
(Continued on page 4 A)
