Program "•CHM.e/u.Norrsj
parative HPLC. A. Y. Tehrani, D. R. Bleeker, P. F. Bailey (ISCO). 3:05—819. LC—Transition from the Laboratory to Pilot Scale. T. Filipi, H. Kessler, F. Rabel (Whatman Chemical Separation). 3:25—Recess 3:35—820. Use of Real-Time Absorbance Ratio Measurements in Pre parative LC. T. Thornton, P. Webb, D. Ball (Micromeritics Instrument). 3:55—821. Automated Preparative Chromatography: The Scaling Tool for Industrial Chromatographic Pu rifications. D. Dzuro, E. Ashare, A. Heckendorf (Waters Associates). 4:15—822. The Dynamics of Large Scale Chromatographic Purifications. E. Ashare, C. Oberhauser, C. Rausch, A. Heckendorf (Waters Associates). 4:35—823. Characterization of 3, 3' Dichloro-4 4' (2-Hydroxy-3-Anildo-lNapthylazo Biphenyl) (Chlorodiane Blue 'CDB'), an Insoluble Disazo Dye. D. R. Smith, R. M. Phelan, C. D. Wilcox (IBM Corp.) 4:55—824. Production Scale High Per formance Liquid Chromatography: Efficiency of a 30 CM Diameter Col umn. A. Peyrouset, A. Lebret (Elf Aquitaine), Ε. Godbille, P. Devaux.
L. B. "BUCK" ROGERS li
Room A-B, Playboy Ventnor 1:45—826. Chromatographic Methods: Biotechnology—New Frontiers. D. C. Warren (Houston Baptist TJ). 2:05—827. A Simple Procedure for Se lecting Liquid Phases for Gas Chro matography. M. S. Klee, M. A. Kai ser, K. B. Laughlin (Du Pont). 2:25—828. A Systematic Study of Pa rameters Affecting Vapor Pressure Measurements by High Resolution Gas Chromatography. M. A. Kaiser, D. M . Y o d e r ( D u P o n t ) . 2:45—829. Separation of the o-Phthalaldehyde Derivatives of Taurine and Related Compounds by HPLC Fol lowed by Fluorescent Detection. J. D. Stuart, M. Eslami, D. W. Hill (U of Connecticut). 3:05—830. Modification of Kel-F Poly mers Using Organometallics for Liq uid Chromatography. N . D. Danielson (Miami U). 3:25—Recess 3:35—831. Studies on the Nature of Chemically-Modified Silica. C. H. Lochmuller, D. B. Marshall, A. Colborn, M. Hunnicutt, A. Almon, E. Dwyer (Duke U). 3:55—832. A Statistical Index for Eval uating the Accuracy of a Single-Point
Calibration Curve. H. J . Keily, T. J. Prihoda, J. J. Contario, N. W. Brake (Merrell Dow Pharmaceuticals). 4:15—833. Effect of Ionic Strength on the UV-Visualization Technique. B. A. Bidlingmeyer, F. V. Warren (Waters Associates). 4:35—834. Self-Modeling Curve Reso lution Using Fourier Transforms. J. E. Davis (Du Pont). 4:55—835. A Microcomputer-Interfaced Linear Photodiode Array Spectrom eter for Millisecond Time-Resolved UV/Visible Spectroscopy. D. S. Holmes, D. J. Macero (Syracuse U).
MICROBORE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY INSTRUMENTATION
Room A, Convention Hall 1:45—836. Low Dispersion Connecting Tubes for Liquid Chromatography Systems. E. Katz, R. P. W. Scott (Perkin-Elmer). 2:05—837. Gradient Elution for Microbore HPLC. D. Dezaro, R. A. Hartwick (Rutgers U). 2:25—838. Efficient Packing and Cou pling of Small Particle Microbore HPLC Columns. R. F. Meyer, R. A. Hartwick (Rutgers U). 2:45—839. Microbore and Fast HPLC: A Practical Comparison. T. D. Trosper, G. A. Desotelle, M. Gurkin, V. Patel (EM Science). 3:05—840. An Improved Detector and Pump for Microbore HPLC. A. Y. Tehrani (ISCO). 3:25—Recess 3:35—841. A Microbore HPLC/GC Detector Interface. J . Bowermaster, H. M. McNair (Virginia Polytechnic Institute & State U). 3:55—842. Practical Aspects of Small Volume Columns for High-Speed HPLC. G. P. Rozjng, H. H. Lauer, R. J. Jonker, K. P. Hupe (HewlettPackard GmbH). 4:15—843. Practical Applications of Microbore HPLC. F. Rabel, D. Martin, H. Kessler (Whatman Chemical Separation), M. F. Borgerding, Β. Μ. Gordon. 4:35—844. Practical Application of Microbore Column Technologies Without Instrument Modification. R. L, Cotter, E. J. Hillier (Waters As sociates). 4:55—845. Gradient Analysis on Mi crobore Column LC—Performance and Application. K. Saito, H. Noda, A. Nakamoto, N. Kobayashi (Shimadzu).
How to simplify HPLC using low-pressure valves. Rheodyne^ Technical Note 3 shows eight ways of using lowpressure switching valves to simplify method development and routine analysis in high-pressure liquid chromatography. These economical 2-position and 6-position Teflon valves can be inserted before the pump or after the column. Among uses described in detail are switching between reservoirs to select the correct mobile phase for a particular routine analysis. Switching between several different solvents during method devel opment when seeking maximum selectivity. Switching to a flushing solvent. Switching effluent back to the reservoir to conserve solvent. And switching effluent to a fraction collector.
Send for Tech Note #3 All techniques are fully described in this well-illustrated 6-page tech nical note. Contact Rheodyne, Inc., RO. Box 996, Cotati, Calif. 94928, U.S.A. Phone [707] 664-9050.
RHEODYNE
THE LC CONNECTION COMPANY CIRCLE 278 ON READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 55, NO. 2, FEBRUARY 1983 · 207 A
