FUTURE ARTICLES
.now from·
Polarographic Reduction of the Molybdate-Chlorate Sys tem in Biphthalate Medium
regis
Demetrios Kyriacou Analysis of Microsamples Source Mass Spectrometry
by Single
Exposure
Spark
P. Chastagner Electrochemistry of 8, 8'-Diquinolyldisulfide J. J. Donahue and J. W. Olver The Correction and Simulation of Polychromatic Optical Spectra
gas chromatography
kits
John R. Morrey Quantitative Infrared Determination of Ammonium Ion in Hydroxylamine Sulfate
For C o m p l e t e Analysis O f
Everett S. Whitehead
• • • •
Determination of Atmospheric Concentrations of Sulfuric Acid Aerosol by Spectrophotometry, Coulometry, and Flame Photometry
Monosaccharides Protein Amino Acids Purines & Pyrimidines Urinary Steroids
F. P. Scaringelli and K. A. Rehme Computer Methods in Analytical Mass Spectrometry. Structure Codes in Processing Mass Spectral Data
reagents • R e g i s i l . . . a new potent silylating agent for preparing trimethylsilyl derivatives for GC • TPC Resolving A g e n t . . . for sepa ration and measurement of amine and amino acid enantiomorphs • N-Heptafluorobutyrylimidazole . . . for preparing volatile derivatives suit able for electron capture detection And other unique GC reagents
L. R. Crawford and J. D. Morrison A Reaction Rate Method for Ammonia and Blood Urea Nitrogen Utilizing a Pentacyanonitrosyloferrate Catalyzed Berthelot Reaction Theodore E. Weichselbaum, John C. Hagerty, and Harry B. Mark, Jr. Direct Spectrophotometric Determination of Sulfate in Natural Waters by Formation of the Ferric Sulfate Com plex Reiner Goguel Spectrophotometric Determination of Iron with 2-Pyridyl2-Hydroxymethane Sulfonic Acid E. E. H. Pitt and V. M. Stanway
accessories • • • •
Pre-tested column packings Stationary phases Solid supports Other GC materials & supplies
For more information write for Regis GC literature.
Oxygen Distribution in Asphalts Used for Bituminous Paving W. E. Kuykendall, J. S. Hislop, and R. N. Traxler Preparative Thin-Layer Chromatography and High Resolu tion Mass Spectrometry of Crude Oil Carboxylic Acids W. K. Seifert and R. M. Teeter Computerized Learning Machines Applied to Chemical Problems. Investigation of Convergence Rate and Pre dictive Ability of Adaptive Binary Pattern Classifiers P. C. Jurs, B. R. Kowalski, T. L. Isenhour, and C. N. Reilley
See us at Booth D-125,53rdFASEB
1101 Ν. Franklin Chicago, Ill. 60610
REGIS
Circle No. 33 on Readers' Service Card 154 A ·
Meeting
ANALYTICAL CHEMISTRY
Computerized Learning Machines Applied to Chemical Problems. Multicategory Pattern Classification by Least Squares B. R. Kowalski, P. C. Jurs, T. L. Isenhour, and C. N. Reilley
