tion of used oils, hydraulics, and fuels. Features, principles of operation, and specifications are discussed. 4 pp. Baird 221 Newsletter. Molecular Biology Reports, No. 9, features articles on DNA sequencing, electroporation of yeast, and pulsed-field electrophoresis. 8 pp. Bio-Rad Laboratories 222
Catalogs
PV9800 energy-dispersive X-ray analyzer features a full ASCII keypad, an LED display with 12 dynamic function keys, and a high-resolution video monitor with up to 16 colors or 256 gray levels. Edax International 215
Manufacturers' Literature Electrochemistry. Electrochemical Instruments News, Vol. 2, No. 2, includes information on a scanning tunneling microscope for electrochemistry, microelectrodes, and PC software. EG&G Princeton Applied Research 216 Optical isomers. Brochure describes the Cyclodex-B GC column for the analysis of optical isomers. Chromatograms of ginger oil, synthetic apple essence, and menthol are included. 8 pp. J & W Scientific 217 Surface analysis. Reflections contains articles on verifying cleaning effectiveness in CFC replacement programs and applications of FT-IR spectroscopy. 8 pp. Surface Science Laboratories 218 Instrumentation. Brochure describes analyzers for total organic carbon; organic halogen; and sulfur, nitrogen, and chlorine. 4 pp. Dohrmann Division, Rosemount Analytical 219 Newsletter. Biomek Bulletin focuses on the Biomek 1000 automated laboratory workstation for DNA sequencing. Included are applications articles, technical support hints, questions and answers, and a new products section. 8 pp. Beckman Instruments 220 Oil. Brochure highlights MOA multielement oil analyzers for characteriza-
Chromatography. Catalog features products for GC and LC, including columns, pumps, detectors, septa, filters, syringes, and vials. Analytical standards and derivatization reagents are also listed. 192 pp. Chrompack 223
Electrochemistry and Biochemistry —a Growing Relationship Although biochemists have long appreciated the value of electrochemical techniques, at EG&G Princeton Applied Research, we're taking the relationship to its next level. With our Model 273 potentiostat, you can now investigate biochemical systems using microelectrodes at low current levels or at high scan rates!
Biotechnology. Catalog highlights products for chromatography, cell culture, separations, electrophoresis, synthesis, and sequencing applications.. 32 pp. Thomas Scientific 224 Laboratory products. Catalog includes instruments, fume hoods, furniture, chemicals, computer systems, and supplies. Products for biotechnology, chromatography, clinical chemistry, and safety are highlighted. 2200 pp. Fisher Scientific 225 Standards. Catalog lists Specpure CLP solution standards, intended for EPA-certified environmental laboratories using GFAAS or ICP analysis in Superfund work. Johnson Matthey 226 Superconductivity. Catalog features products for superconductivity research, including high-purity elements, salts, and superconducting powders. Information is provided on purity, physical properties, handling precautions, and disposal methods. 30 pp. Aldrich 227 Standards. Catalog lists standards and compounds for inorganic spectroscopy. Single- and multielement solution standards for plasma emission spectrometry are included. 32 pp. Spex 228
For more information on instrumentation 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.
Using our Model 270 software, you can measure currents at 8 picoamps—or lower! And there's no need for extra hardware—our software takes the superb technical specifications of the Model 273 to their limits and beyond.
Are you studying kinetics? The Model 273 has the analog specifications to let you run at scan rates of u p to 10,000 volts per second! Electrochemistry and biochemistry. Through our applications research and technical support, we're dedicated to making this relationship grow. For more information call us at 609-530-1000.
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Circle 36 for literature. Circle 37 for Sales Rep. ANALYTICAL CHEMISTRY, VOL. 63, NO. 2, JANUARY 15, 1991 • 77 A
