Contributed Articles

Potentiometric Study of Base Strengths in the Binary Solvent, Acetic Acid-Chloroform. O. W. Kolling and K. I. Laws 986

Investigation of Polytertiary Alkylamines Using Chem­ical Ionization Mass Spectrometry. Τ. Λ. Whitney, L. P. Klemann, and F. H. Field 1048

Automation of Nitrogen Analysis of Grain and Grain Products. D. E. Uhl, Ε. Β. Lancaster, and Charles Vojnovich 990

Conducting Glass Electrode in a Thin-Layer Electro­chemical Cell with Application to the Analysis of Neptunium. R. C. Propst 994

Combined High Speed Liquid Chromatography and Bioassay for the Evaluation and Analysis of an Or-ganophosphorus Larvacide. R. A. Henry, J. A. Schmit, J. F. Dieckman, and F. J. Murphey 1053

Laser Pyrolysis Gas Chromatography—Application to Polymers. 0. F. Folmer, Jr. 1057

Electrochemical Reduction of α,^-Unsaturated Ke­tones. J. P. Zimmer, J. A. Richards, J. C. Turner, and D. H. Evans 1000

X-Ray Photoelectron Spectroscopy of Quaternary Phosphonium Compounds. W. E. Swartz, Jr., and D. M. Hercules 1066

Characterization and Analysis of Waxes by Gel Per­meation Chromatography. D. E. Hillman 1007

Analysis of Chrome Ores and Chrome-Magnesite Re­fractory Samples by Atomic Absorption Spectrometry. R. P. Lucas and B. C. Ruprecht 1013

Rapid Laboratory Dialysis for Aminoacylation Assay of tRNA. Hao-Chia Chen, C. H. O'Neal, and L. C. Craig 1017

Neutron Activation Analysis of Sediments for Halo­gens Using Szilard-Chalmers Reactions. L. J. Walters, Jr., and J. W. Winchester 1020

Analytical Significance of Peaks and Peak Ratios in X-Ray Fluorescence Analysis Using a High Resolution Semiconductor Detector. Analysis of Uranium Solu­tions by X-Ray Spectrometry. Cesia Shenberg and Saadia Amiel 1025

Analysis of Krebs Cycle and Related Acids in Guinea Pig Tissue by Gas-Liquid Chromatography. Estner Mensen de Silva 1031

Resolution Enhancement of Chromatograph Peaks. D. W. Kirmse and A. W. Westerberg 1035

Gas Chromatographic Analysis of Phenol and Substi­tuted Methyl Phenols Using Open Tubular Columns. Jân Hrivnâk and Jiri Macék 1039

Fluorometric Determination of Some Primary Aro­matic Amines with 2,6-Diaminopyridine. L. J. Drom-browski and E. L. Pratt 1042

Barium Ion-Selective Electrode Based on a Neutral Carrier Complex. R. J. Levins 1045

Spectroelectrochemistry—Application of Optically Transparent Minigrid Electrodes under Semi-Infinite Diffusion Conditions. Miiica Petek, T. E. Neal, and R. W. Murray 1069

Mercury-Platinum Optically Transparent Electrode. W. R. Heineman and Theodore Kuwana 1075

Computerized Recording and Interpretation of Spark Source Mass Spectra. Robert Brown, Patrick Powers, and W. A. Wolstenholme 1079

Submolecular Group Analyses of High Resolution Mass Spectra of Peptides and Other Sequence Mole­cules. A. Kunderd, R. B. Spencer, and W. L. Budde 1086

Mechanistic Studies on the Valinomycin-Based Potas­sium Electrode. Ehud Eyal and G. A. Rechnitz 1090

Notes

Gas Chromatographic Resolution of Optically Active Alcohols as 3/3-Acetoxy-A5-Etienates. M. W. Anders and M. J. Cooper 1093

Effect of Temperature Control on the Stability and Sensitivity of a High Pressure Liquid Chromatography Ultraviolet Flow Cell Detector. Gary Brooker 1095

Interpretation and Correlation of Bulkiness Chirality and Separation Coefficients in the Resolution of Dia-stereoisomers by Gas-Liquid Partition Chromatogra­phy. Binyamin Feibush 1098

Spectrophotometry Determination of Cyanide, Sul­fide, and Sulfite with Mercuric Chloranilate. R. E. Humphrey and Willie Hinze 1100

ANALYTICAL CHEMISTRY, VOL. 43, NO. 8, JULY 1971 • 3 A

Contributed Articles

Example of Flame Photometric Analysis for Methyl Parathion in Rat Whole Blood and Brain Tissue. Joe Gabica, Joe Wyllie, Michael Watson, and W. W. Ben­son 1102

Analysis of Composite Spectra from Mixtures Sub­jected to Micromolecular Distillation in a Mass Spec­trometer. R. D. Grigsby, C. 0. Hansen, D. G. Manner-ing, W. G. Fox, and R. H. Cole 1135

Determination of Perbromates by Potentiometric Ti­tration. J. R. Brand and M. L. Smith 1105 Correspondence

Molecular Weight Determination of Benzene Contain­ing Compounds by Ultraviolet Spectrometry. F. R. Seymour 1107

Separation of Calcium-Strontium Investigated by the Use of Tracers. E. J. Baratta and F. E. Knowles, Jr. 1138

Determination of Nitric Acid in Oleum with a Nitrate Ion Selective Electrode. J. M. C. Ridden, R. R. Bare­foot, and J. G. Roy 1109

Conductometric Determination of pK„ Values—Oxalic and Squaric Acids. R. /. Gelb 1110

Measurement of Atmospheric Nitrous Oxide Using a Molecular Sieve 5A Trap and Gas Chromatography. M. D. LaHue, H. D. Axelrod, and J. P. Lodge, Jr. 1113

Ferrate(VI) Analysis by Cyclic Voltammetry. A. S. Venkatadri, W. F. Wagner, and H. H. Bauer 1115

Aids for Analytical Chemists

Digital Data Acquisition from a Hilger-Watts H I 2 0 0 Infrared Spectrophotometer. J. S. Mattson and A. C. McBride III

Modification of a Direct Probe for the Controlled Intro­duction of Mass Spectrometer Samples. L. D. Smith-

1139

Versatile Injection System for Gas Chromatography. G. E. Pollock, Angelo Margozzi, Ralph Donaldson, and Fritz Woeller 1141

1142

Contraction of Some Solvents Used in Low-Tempera­ture Spectrometric Measurements. Onno Korver and Jan Bosma 1119

Modification of a Fraction Collector for Large Volumes and Use of Siphons in Fraction Collecting. N. S. Radin 1143

Determination of Iodine and Fluorine in Selenium. Ulla Westerlund-Helmerson 1120

Determination of Polysorbates in Food Products by Reaction Gas Chromatography. Gary Lundqu/st and C. E. Meloan 1122

Stoichiometry in the Neutral lodometric Procedure for Ozone by Gas-Phase Titration with Nitric Oxide. J. A. Hodgeson, R. E. Baumgardner, B. E. Martin, and K. A. Rehme 1123

Some Observations on Stoichiometry of lodometric Analyses of Ozone at pH 7.0. S. L. Kopczynski and J. J. Bufalini 1126

Determination of Submicrogram Quantities of Mer­cury in Pulp and Paperboard by Flameless Atomic Ab­sorption Spectrometry. D. C. Lee and C. W. Lauf-mann 1127

Programmed Temperature Gas Chromatography for Identification of Ester Plasticizers. Anoop Kn'shen 1130

Technique for Controlling Thio Compound Concentra­tion in Electroless Plating Baths. N. Feldstein and J. A. Weiner 1133

© Copyright 1971

by the American chemical Society

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