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Model 3850 electropherograph per forms micellar electrokinetic capillary chromatography as well as convention al free-solution methods with coated and uncoated capillaries. Isco 218 NMR. Brochure describes the Model R-1200 r a p i d - s c a n 60 MHz NMR spectrometer, which prints chemical shift and integration values, as well as acquisition and processing param eters, directly on the spectrum. 4 pp. Hitachi Instruments 219 GC. DET Report, No. 18, describes the detection of oxygenated compounds with the TID-1-N 2 mode of thermion ic detection. Oxygenate fingerprints
of gasolines are discussed. 12 pp. De tector Engineering & Technology 220
ties, CAS registry numbers, and or ganoleptic descriptions are provided. 51 pp. Aldrich Chemical Co. 224
S p e c t r o p h o t o m e t e r s . Brochure highlights the DU series 7000 diode array spectrophotometers, which fea ture microanalysis capabilities, ap plications software, and a selectable dual-source system. 16 pp. Beckman Instruments 221
Laboratory products. Catalog fea tures liquid-handling products, in cluding pipettes, pipette tips, adjust able dispensers, plastic disposables, and accessories. 32 pp. Oxford Labware 225
Catalogs I m m u n o c h e m i s t r y . C a t a l o g in cludes products for Ag/Ab purifica tion, avidin-biotin applications, and protein modification. Also listed are immunogens and antibodies. 66 pp. Pierce Chemical Co. 222 TLC. Catalog contains products and instrumentation for TLC and sample preparation. Included a r e a video densitometer a n d biphasic TLC plates. Analtech 223 C h e m i c a l s . Catalog contains more than 600 listings of flavor and fra grance chemicals. Physical proper
LABORATORY PARTICLE SIZE STANDARDS NBS traceable calibration standards and controls. Large assortment of diameters from 0.02 to 2000 μνη. Micro spheres of polystyrene, glass and fluorescent materials. Free catalog available. Toll Free 800-334-3883. In Calif. 415-962-1100. FAX 415-962-0718 Duke Scientific Corporation
1135D SAN ANTONIO ROAD PALO ALTO, CALIF. 94303
FREE CATALOG GRAPH: great for scientific plotting and standard curve calculations, MINSQ: non-linear curve fitting and modeling, EQUIL: solution chemical equilibrium calculations, and more! Prices from $150.
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S p e c t r o s c o p y . Catalog contains supplies and accessories for UV-vis and fluorescence spectroscopy. Appli cations information is also provided. 52 pp. Perkin-Elmer 226 S a f e t y . C a t a l o g lists more t h a n 12,000 products, including eyewear, labels, signs, gloves, chemical storage equipment, clothing, and respirators. Lab Safety Supply 227
For more information on instrumenta tion and software products, and/or to obtain the free available information on other listed items, please circle the appropriate numbers on one of our Readers' Service Cards.
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ANALYTICAL CHEMISTRY 500 Post Road East P.O. Box 231 Westport, CT 06880 203-226-7131/FAX: 203-454-9939
MicroMath, Salt Lake City, UT 84121-0550
FREE DATA, FAST To quickly amass data on all of the products you need, consult the Lab Data Service section on our Analytical Chemistry reader reply card insert.
Laboratory Service Center (Equipment, Materials, Services, Instruments for Leasing), Maximum space — 4 inches per advertisement. Column width, 2-3/16"; two column width, 4-9/16". Artwork accepted. No combi nation of directory rates with ROP advertising. Rates based on number of inches used within 12 months from first date of first insertion. Per inch: 1 " — $175; 12" — $170; 24" — $165; 36" — $160; 48" — $155. CALL OR WRITE JANE GATENBY
ANALYTICAL CHEMISTRY 500 Post Road East P.O. Box 231 Westport, CT 06880 203-226-7131/FAX: 203-454-9939
302 A • ANALYTICAL CHEMISTRY, VOL. 63, NO. 5, MARCH 1, 1991
