GLENCO SCIENTIFIC. INC. - Analytical Chemistry (ACS Publications)

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INTRODUCING

THE LEAK PROOF GAS/LIQUID SYRINGE

exclusively from

• Chemically inert — only borosilicate glass, Teflon" and Kel F are exposed to the gas or liquid. LEAK FREE seal provided by unique design (Teflon" sheath over double " O " ring) » Plungers and barrels interchangeable within a given size • Available with removable or fixed needles in capa­ cities from 50μΙ to 100 ml • Complete line of accessory fittings available for 19925 Series Send today for complete catalog of Glenco syringes, columns, dispensers, and accessories.

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The most intelligent microbalance

The new AD-2Z Autobalance with both Autoranging and Autozero It can set zero, balance the beam, select the best range, shift the decimal, display the weight on a large digital readout, print it (with an optional printer) and much more . . . all automatically and within seconds. That's what all microbalances should do, but only the AD-2Z does. 5 gram capacity, 0.1 microgram sensitivity. Recording and vacuum models available. Call your local Perkin-Elmer sales office, or write Instrument Division, Perkin-Elmer Corporation, Main Av­ enue, Norwalk, CT 06856.

PERKIN ELMER CIRCLE 169 ON READER SERVICE CARD 480 A · ANALYTICAL CHEMISTRY, VOL. 48, NO. 6, MAY 1976

News Gold. $190, ACS members; $230, nonmembers Solving Problems with Modern Liquid Chromatography San Francisco (ACS Meeting). Aug. 28-29. J. J. Kirkland and Lloyd R. Snyder. $160, ACS members; $195, nonmembers Laboratory Automation: Micro-, Mini-, or Midicomputers? San Francisco (ACS Meeting). Aug. 28-29. Raymond Dessy and the Chem­ istry Dept. Instrument Design and Automation Research Group from VPI&SU. $145, ACS members; $180, nonmembers Practical NMR Purdue University, West Lafayette, Ind. Parts I and II: May 10-13. J. W. Amy, W. E. Baitinger, J. R. Barnes, J. B. Grutzner, J. L. Markley, N. Muller, R. E. Santini, J. Ray, and G. Slomp. $150, each part; $250, both. Contact: Carl Jenks, Division of Conferences, Stewart Center, Purdue University, West Lafayette, Ind. 47907. 317-7492533 Basic Gas Chromatography and Gas Chromatography Trouble­ shooting Workshop Vancouver, Canada. May 10-14. Sponsored by Gulf South Research In­ stitute in cooperation with HewlettPackard. $180 for basic gas chroma­ tography (3 days), $120 for trouble­ shooting course (2 days), or $275 for both. Contact: Pam Gaskins, HewlettPackard, P.O. Box 27409, Houston, Tex. 77027. 713-781-6000 X-ray Spectrometry State University of New York at Alba­ ny. Session I: June 7-11, Session II: June 14-18. $375, each session; $700, both. Contact: Physics Dept., State University of New York at Albany, Al­ bany, N.Y. Thin-Layer Chromatography Academic Center, East Brunswick, N.J. June 14-15. Irwin L. Shapiro and B. Fried. $250 (includes luncheons, beverage breaks, and lecture notes). Contact: The Center for Professional Advancement, P.O. Box 997, Somerville, N.J. 08876 Scanning Electron Microscopy and Electron Probe Microanalysis Lehigh University, Bethlehem, Pa. June 14-18. Joseph I. Goldstein, Pat-