Contributed Articles Computer-Controlled Gas Chromatograph Capable of Real-Time Readout of High-Precision Data. R. S. Swingle and L. B. Rogers
Marc Roth
880
Instrumental Peak Distortion. III. Analysis of Over lapping Curves. /. G. McWilliam and H. C. Bolton
883
Potentiometric Determination of Cyanide with an Ion Selective Electrode. Application to Cyanogenic Glyco sides in Sudan Grasses. W. J. Blaedel, D. B. Easty, Laurens Anderson, and T. R. Farrell
890
Analysis of Acrylic Polymers Using Combined Zeisel Reaction-Gas Chromatography and Infrared Spec trometry. D. G. Anderson, K. E. Isakson, D. L. Snow, D. J. Tessari and J. T. Vandeberg
894
Identification of Alkanes by Pyrolysis Gas Chroma tography. R. A. Brown
900
Nuclear Magnetic Resonance Identification of o,p-lsomers in an Ethoxylated Alkyphenol Nonionic Surfactant as Tris(2,2,6,6-tetramethylheptane-3,5-dione)europium (III) Complexes. G. E. Stolzenberg, R. G. Zaylskie, and P. A. Olson
908
Determination of Uranyl and Thorium(IV) by Gas Chromatography of Volatile Mixed-Ligand Complexes. R. F. Sieck, J. J. Richard, Kay Iversen, and C. V. Banks
913
845
Modularized Digitizing Time-Synchronizing CurrentSampling System for Electroanalytical Studies R. G. Clem and W. W. Goldsworthy
918
Systematic Studies of the Breakdown of ρ,ρ'-DDT in Tobacco Smokes. . II. . Isolation and Identification of Degradation Products from the Pyrolysis of ρ,ρ'-DDT in a Nitrogen Atmosphere. N. M. Chopra and Ν. Β. Osborne
849
Rotating Ring-Disk Study of the Reduction of Oxidized Platinum by Mercurous Mercury and Its Adsorption on Reduced Platinum Stanley Bruckenstein and M. Z. Hassan
928
Dynamics of Continuous Segmented Flow Analysis. R. D. Begg
854
Quantitative Aspects of Spectrodensitometry of Thin Layer Chromatograms. J. C. Touchstone, S. S. Levin, and Taras Murawec
858
Determination of Erythromycin and Its Derivatives by Gas-Liquid Chromatography. Kiyoshi Tsuji and J. H. Robertson
Fluorescence Reaction for Amino Acids. 810
818
Gas Chromatographic Studies of Rapid Repeated Injec tions of Samples into a Column. Donald Macnaughtan, Jr., and L. B. Rogers
822
Gas Chromatography of Reactive Sulfur Gases in Air at the Parts-per-Billion Level. R. K. Stevens, J. D. Mulik, A. E. O'Keeffe, and K. J. Krost
827
Determination by Gas-Liquid Chromatography of Phys iological Levels of Chromium in Biological Tissues. G. H. Booth, Jr., and W. J. Darby
831
Assay of Phenols and Arylamines via Oxidative Cou pling. D. N. Kramer and L. U. Tolentino
834
Radioanalytical Applications of Gamma-Gamma Coinci dence Techniques with Lithium-Drifted Germanium Detectors. J. A. Cooper Computerized Learning Machines Applied to Chemical Problems. Optimization of a Linear Pattern Classifier by the Addition of a " W i d t h " Parameter. L. E. Wangen, Ν. Μ. Frew, and T. L. Isenhour
Milligram Scale Automatic Preparative Gas-Liquid Chromatography of the Steranes and Triterpanes Iso lated from Green River Formation Oil Shale. Emilio Gelpi, Patricia Wszolek, Esther Yang, and A. L. Burlingame Distribution Coefficients and Cation Exchange Behavior of Elements in Hydrochloric Acid—Acetone. F. W. E. Strelow, A. H. Victor, C. R. van Zyl, and Cynthia Eloff Cation Exchange Separation of Metal Ions with Potassium Chloride-Chelating Agent-Organic Solvent Medium. K. S. Lee, D. W. Lee, and S. W. Kang
838
Notes Rotating Ring-Disk Study of the Underpotential Depo sition of Copper at Platinum in 0.5M Hydrochloric Acid S. H. Cadle and Stanley Bruckenstein
932
Spectral Distribution of a Thin Window Rhodium Target X-Ray Spectrographic Tube J. V. Gilfrich, P. G. Burkhalter, R. R. Whitlock, E. S. Warden, and L. S. Birks
934
870
Atomic Absorption Characteristics of Rhenium Reso nance Lines below 2500 Â. B. W. Bailey and J. M. Rankin
936
876
An Improved Linear Plotting Method for End-Point Detection of Chelatometric Titration with Metal Indicator. Hisakuni Sato and Kozo Momoki
938
864
ANALYTICAL CHEMISTRY, VOL. 43, NO. 7, JUNE 1971
·
3A
Contributed Articles Determination of Mercury by Using a Gold Trap in Samples Containing Considerable Sulfide Minerals. P. C. Leong and H. P. Ong Gas Chromatographic Studies of Surface Complexes Formed by Aromatic Molecules with Lanthanum Chloride on Silica Gel and Graphon. D. F. Cadogan and D. T. Sawyer
Use of an Atomic Absorption Spectrophotometer for Colorimetric Analysis. M. A. Hildon
973
Raman Spectra of Trapped Gas Chromatograph Effluents. B. J. Bulkin, Kilian Dill, and J. J. Dannenberg
974
An Auto-Zero and Base-Line Drift Corrector for Gas Chromatography. W. A. R/ggs
976
An Improved Kel-F Vacuum Valve.
977
940
941
Improved Hersch Cell System for Rapid Determination of Oxygen in Gases. D. R. Kendall
T. A. O'Donnell
Ion-Selective Electrode Procedure for Organophosphate Pesticide Analysis. George Baum and F. B. Ward
947
Torch Analyzer for Precise Determination of Hydrogen in Liquid Hydrocarbons. David Liederman and J. R. Glass
979
Lithium Isotopic Analysis by Nuclear Magnetic Resonance Spectrometry. Albert Attalla and R. R. Eckstein
949
On-Line Laser Pyrolysis Cell for Chromatography. P. Biscar
982
Gas Chromatographic Determination of Organic Mercury Compounds by Emission Spectrometry in a Helium Plasma. Application to the Analysis of Methylmercuric Salts in Fish. C. A. Bache and D. J. Lisk
J.
Generation of Clean Air to Permit Gas Chromatography without Cylinders. W. H. King, Jr.
984
Correction. Two Methods for Separation of Surface and Bulk Gases in Vacuum-Fusion Analysis of Metals. K. W. Guard/pee
882
955
Correction. Determination of Hydrogen Sulfide, Sulfur Dioxide, Carbonyl Sulfide, Carbon Disulfide, and Carbon Dioxide in a Gas Mixture. Arthur Schwartz
907
Thermochemical Measurements with a Capacitance Manometer. R. P. Turcotte, T. D. Chikalla, and L. Eyring
958
Correction. Determination of the Number and the Nature of the End Groups of Poly(Vinyl Chloride). Marc Carrega, Claude Bonnebat, and Georges Zednik
917
Calibration of a Practical Acidity Scale for Sulfolane as Solvent. J. F. Coetzee and R. J. Bertozzi
961
Improved Gas Chromatographic Separation of Free Acids Ci-C, in Dilute Solution. D. M. Ottenstein and D. A. Bartley Spectrophotometric Determination of Nitrate in the Presence of Chloride. R. S. Lambert and R. J. DuBois
950
952
© Copyright 1971 by the American Chemical Society
Method for Determination of pK Values of Certain Low Solubility Organic Amines. Josip Caja and H. B. Mark, Jr. Determination of Microgram Quantities of Methadone by Fluorescence. E. J. McGonigle
964
966
Correspondence
m
MANUSCRIPT REQUIREMENTS published in December 1970 issue, page 1879, outlines scope and copy requirements to be observed in preparing manuscripts for consideration. Manuscript (4 copies) should be submitted to ANALYTICAL CHEMISTRY, 1155 Sixteenth St., N.W., Washington, D. C. 20036. 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. 1971 Subscription Rates lyr.
Increased Sensitivity in High-Resolution Mass Spectrometry Using an On-Line Computer. F. W. McLafierty, R. Venkataraghavan, J. E. Coûtant, and B. G. G/essner
967
Dissociation Constant of Hydrochloric Acid from Partial Vapor Pressures over Hydrogen Chloride-Lithium Chloride Solutions. R. A. Robinson a n d R. G. Sates
969
A Word of Caution about Use of Dimethyl Sulfoxide as Solvent in Analytical Procedures. D. L. Venezky
971
Aids for Analytical Chemists Ion Exchange Filter Paper Holder for X-Ray Spectrometry. S. L. Tackett 4A ·
972
ANALYTICAL CHEMISTRY, VOL. 43, NO. 7, JUNE 1971
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