Schoeffel Instrument Corp. 24 Booker St., Westwood, N.J. 07675. Continuously variable wavelength monitor for LC; high-intensity lamp housings; miniature grating, prism monochromators, photodetection equipment.
Supelco, Inc. Supelco Park, Bellefonte, Pa. 16823. Column packings for gas chromatography, GC supports, adsorbents, glass, other gas chromatography columns, related accessories for gas, liquid, thin-layer chromatography.
Scientific Gas Products Inc. 513 Raritan Center, Edison, N.J. 08817. Ultra high-purity gas; gas mixtures; gasregulating equipment, research-grade gases.
Tekmar Co. P.O. Box 37202, Cincinnati, Ohio. Homogenizers, analytical mills, recorders, hollow cathode lamps, dispensers.
Siemens Corp. 186 Wood Ave. S., lselin, N.J. 08830. Xray generator, sequential X-ray spectrometer, electronic panel computer, X-ray diffraction equipment. Spectrametrics, Inc. (SMI) 204 Andover St., Andouer, Mass. 01810. Echelle grating spectrometer, a dc argon plasma, atomic emission system for both qualitative and quantitative analysis; options for single-element or multielement and photographic analysis using a echellogram comparator. Spectra-Physics, Inc. 2250 W. Middlefield Rd., Mountain View, Calif. 94042. Liquid chromatography systems, components, accessories; digital integrators for laboratory automation of gas, liquid chromatographs. Spex Industries, Inc. Box 798, Metuchen, N.J. 08840. MP3 thermal chromatograph, an instrument generating both thermagram and chromatogram for identifying and quantitating ingredients in organic compounds.
A r t h u r H. T h o m a s Co. Third and Vine Sis., Philadelphia, Pa. 19105. Stack sampler and glassware, melting-point apparatus with programmer, pollution trace oven, UV-VIS spectrophotometers, electronic balances. T^racor I n c 6500 Tr'acor Lane, Austin, Tex. 78721. 222/550 gas chromatographs, specific detectors, liquid chromatographs, data handling system. Tracer Northern 2551 W. Beltline Hwy., Middleton, Wis. 53562. NS-575A signal averager, NS-880 elemental X-ray analyzer, TN-11/1203 computer-controlled signal averager. Varian Assoc. 611 Hansen Way, Palo Alto, Calif. 94303. New liquid chromatograph with multiwavelength ' UV detector, gas chromatograph, carbon-13 NMR spectrometer, analytical NMR equipment, atomic absorption spectrophotometer with background corrector, new air microsampler, new mass spectrometer/gas chromatograph with data system, analytical instrument parts and supplies.
VWR Scientific Box 3200, San Francisco, Calif. 94119. B&L mini-spec 20, B&L spectrophotometers, Bronwill constant-temperature circulators, Bronwill ultrasonic disintegrators. Waters Associates, Inc. Maple St., Milford, Mass. 01757. Liquid chromatographs, solvent delivery systems, solvent programmers, LC column packing materials. Wescan Instruments, Inc. 3018 Scott Blvd., Santa Clara, Calif. 95050. Membrane osmometer, cloud-point apparatus, viscosity timer, conductivity meter, cells. Wilks Scientific Corp. P.O. Box 449, S. Norwalk, Conn. 06856. IR accessories including 20, 40-m gas cells, GC-IR attachment; miniature infrared analyzers for laboratory and field analysis of solids, liquids, gases; infrared monitoring systems. Willey Corp. 720 E. Fee Ave., Melbourne, Fla. 32901. Infrared Fourier transform spectrophotometer. W i l m a d G l a s s Co., I n c . Rte. 40 & Oak Rd., Buena, N.J. 08310. Spectroscopic supplies and accessories for NMR, IR, ESR, MS, GC; NMR sample tubes: NMR, IR, general recording charts; deuterated solvents; microliter syringes. C. N . W o o d M f g . Co. Newtown Industrial Commons, Newtown, Pa. 18940. Light scattering photometers, differential refractometers, readout equipment.
Just Released! FOR GAS CHROMATOGRAPHERS
CATALOG
CICERO SCIENTIFIC PURE QUARTZ COMBUSTION TUBES
700..
Special annealing process used in making every Cicero combustion tube. Our carbon tubes have heavy-duty built-in jet, give extra hours of lab life. Jetting stems in other tubes allow easier, faster cleaning, reduce capillary opening breakage. All sulfur tube bodies have same dimensions. Unconditionally guaranteed against defects. Instant delivery from stock. Mail coupon or phone collect (616-926-2581) anytime. Ask about our Safety-First Purifying Trains too!
SAVE On our bulk-quantity discounts! Mai! t o : Cicero Scientific Glass, 308 W. Empire, P.O. Box 671, Benton Harbor, Mich. 49022.
Please check for data: • Combustion tubes • Purifying trains G Carbon analyzers • Custom glassware • Please phone. Name
Title Organization/Firm Phone Aririrpss . City State & z i p _
.
48 PAGES OF CHEMICALS, SUPPLIES AND s GADGETS CRS Catalog 700 lists hundreds of often unique, always useful chemicals, supplies and gadgets of special significance to the gas chromatographer. Everything from Activated Charcoal to Vibrators, with many exclusive items. Send for your FREE copy today. Please send FREE copy of CRS C A T A L O G 700.
AC/10
Name & Title Company/Institution Address City
,
CIRCLE 40 ON READER SERVICE CARD 1026 A · ANALYTICAL CHEMISTRY, VOL. 46, NO. 12, OCTOBER 1974
State & Zip
Chemical Research Services, Inc. 852 Westgate Drive · Addison, Illinois 60101
CIRCLE 39 ON READER SERVICE CARD
