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»"»W T O G HT
PROGRAMMED MULTIPLE DEVELOPMENT . . . is gaining recognition as a new, significant approach to thin layer chromatography. Among the reasons for this are: i At comparable development time, PMD offers greater resolution than conventional TLC with still greater improvement for longer developments. 2 For equal resolution, PMD is faster than conventional TLC. 3 Because PMD developed spots are much narrower, PMD offers sensitivity that is 5 to 10 times greater than conventional TLC for major components, and even more for normally undetectable trace components and longer developments. The PMD story, complete with photographs and diagrams, is presented in a new booklet entitled "HOW TO GET BETTER TLC RESULTS". The booklet is free upon request. Also, each month Regis issues "PMD NEWS," a newsletter devoted exclusively to PMD applications and instrumentation. For a copy of the booklet "HOW BETTER TLC RESULTS" and/or to the free monthly newsletter, NEWS," write or phone the Regis sional Service Department.
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REGIS CHEMICAL CO. 8210 Austin · Morton Grove, III. 60053 Area Code (312) 967-6000
pled Plasma-Optical Emission Spectroscopy System. S. R. Koirtyohann, W. Freeark, G. Wallace, U of Missouri 10:45 Nonflame, Nondispersive Atomic Fluorescence Spectrometry. B. R. Bartschmid, C. Veillon, U of Houston 11:00 Mechanism of Excitation of Atoms in Electrodeless Discharge Lamps. R. Avni, L. P. Hart, J. D. Winefordner, U of Florida 11:15 Some N e w Approaches to Atomization for Atomic Spectrometry. T. J. Vickers, W. E. Rippetoe, Florida State U 11:30 Automated Optimization of Pulsed Hollow Cathode Discharge Tubes. E. R. Johnson, T. J. Vickers, Florida State U 11:45 Application of Molecular Emission Cavity Analysis. R. Belcher, S. L. Bogdanski, I. Rix, A. Townshend, U of Birmingham, England 12:00 Exploding-Foil Excitation for Analysis of Trace Metals in Aqueous Media. R. D. Sacks, C. S. Ling, U of Michigan 12:15 Quantitative Energy-Dispersive Analysis Using Scanning Electron Microscope. R. G. Hurley, J. D. Janowski, J. Tabock, Ford Motor Co. 12:30 Applications of Integral and Derivative Thermogravimetry to Analysis of Rubber Formulations. S. J. Swarin, A. M. Wims, General Motors Corp.
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General Organic Chairman: J. G. Grasselli, Standard Oil Co.
10:30 Quantitative Ultrafine Oil Mulling for Infrared Analyses. J. S. Ard, H. Susi, USDA, ARS 10:50 Rapid Determination of Free Amino Groups in Proteins by Absorption Spectroscopy. J. M. Purcell, D. J. Quimby, J. R. Cavanaugh, USDA, ARS 11:10 Spectrofluorometric Determination of Pharmaceuticals Containing Aromatic or Aliphatic Primary Amino Groups as Their Fluorescamine (Fluram®) Derivatives. J. A. F. de Silva, N. Strojny, Hoffmann-La Roche, Inc. 11:30 Applications of Relative Fluorescence Efficiency to Determination of Impurities in Solutions of Complex Fluorescing Molecules. R. B. Blaster, A. Timnick, J. F. Holland, Michigan State U 11:50 Study of Chloranil Charge Transfer Reaction with Amino Acids. K. L. Cheng, U of Missouri 12:10 Fluorometric Determination of Ferricyanide and Thiamine in Water. M. C. Goldberg, J. K. Wilson, U.S. Geological Survey
CIRCLE 203 ON READER SERVICE CARD 1014 A • ANALYTICAL CHEMISTRY, VOL. 46, NO. 12, OCTOBER 1974
CIRCLE 2 ON READER SERVICE CARD CIRCLE 34 ON READER SERVICE CARD-
