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PRODUCTS
Dissolution testing. Data sheet describes the features of the Bio-Dis II dissolution testing instrument, which is designed to test pellets, tablets, and transdermal patches under a variety of pH conditions. A chart lists the technical specifications and available accessories. VanKel Industries, Inc. 428 HPLC. Brochure discusses the automated isocratic HPLC system designed for QA/QC applications. Each component of t h e s y s t e m is d e scribed, including the 307 pump, the 231/401 autosampling injector, and the 115 UV detector. Gilson 429 LC. Varex Report, Vol. 4, No. 2, includes information on continuously adjustable piston (CAP) columns for HPLC and on preparative and semipreparative HPLC accessories. 8 pp. Varex Corp. 430 F o o d t e c h n o l o g y . Bulletin 1611 discusses electrophoretic and m i croplate techniques for the analysis of foods. Applications of both techniques are described. Bio-Rad Laboratories 431 Electrochemistry. Brochure highlights the features and performance advantages of the Model 273A potentiostat/galvanostat designed for exp a n d e d electrochemical m e a s u r e m e n t capabilities. 6 pp. EG&G Princeton Applied Research 432 Brochure. Vol. 5, No. 1 of Rainin Dynamax Review discusses the Model PS3 peptide synthesizer, temperature-dependent chromatographic fractionation of FK-506 conformat i o n a l isomers, a n a l y s i s of basic drugs on SynChropak SCD, and applications of immobilized protein A. 12 pp. Rainin Instrument Co. 433
Catalogs Gases. Catalog features a reference guide on electronic gases, including ULSI grades of hydrogen chloride, nitrous oxide, sputtering-grade argon, and other semiconductor process gases. Also included are gas cabinet systems as well as g a s - h a n d l i n g , safety, and detection equipment. 144 pp. Scott Specialty Gases 434 F o r e n s i c s . Catalog includes more than 300 forensic chemicals and supplies such as controlled substances, deuterium-labeled compounds, pure drug standards, pseudonarcotics and pseudocorpse formulations, and re-
lated substances. Licensing and ordering requirements are also provided. 73 pp. Sigma Chemical Co. 435 C h r o m a t o g r a p h y . Catalog includes products for sample preparation, TLC, analytical and preparative HPLC, high-performance biochromatography, and process-scale chromatography. EM Separations 436
Say Goodbye to Either/Or Electrochemistry
Instrumentation. Catalog lists pH meters and electrodes, ion-selective electrodes, resistance thermometers, t i t r a t i o n vessels, pumps, s t i r r e r s , photometers, laboratory recorders, and buffer solutions. 48 pp. Metrohm 437 Life s c i e n c e s . Catalog describes microscopes, data acquisition hardware and software, intracellular and extracellular amplifiers, electrometers, microinjection pumps, and microelectrodes. 88 pp. World Precision Instruments 438 Clean r o o m . Catalog features products such as clean room paper, tacky mats, gloves and garments, HEPA filters, and wipes. Larger items such as portable clean rooms, laboratory chairs, and storage cabinets are also described. 16 pp. Midwest Scientific 439 Isotopes. Catalog lists stable isotopically labeled compounds, including deuterated NMR solvents and reagents, specialty gases, biomedical products (e.g., amino acids, steroids, and sugars), and GC/MS standards (including 13 C-labeled and native chlorodibenzo-^>-dioxins). Cambridge Isotope Laboratories 440 Lab supplies. Catalog includes supplies for industrial, academic, and government laboratories. A comprehensive index lists all products from air samplers and animal equipment to water-sampling items, reagents, and chemicals. 950 pp. J. & H. Berge, Inc. 441 L a b o r a t o r y e q u i p m e n t . Catalog features equipment for biological, analytical, and environmental applications, including autoclaves, homogenizers, pipettors, shakers, automatic s a m p l e r s , a n d s t i r r e r s . 96 pp. Tekmar 442 HPLC. Catalog presents information on HPLC separation mechanisms, applications, packings and columns, column fittings, standards, and instrumentation. 118 pp. Bio-Rad 443
Square Wave Stripping 80 ppb Lead Mercury Microelectrode
ost electrochemical software is designed to do either sophisticated research or routine measurements. In the past, if your lab did both, you were stuck.
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Either you had to buy two separate packages, which meant satisfying the compatibility requirements for both and learning two very different environments. Or you had to buy one package and make do. Well say goodbye to eitherjor electrochemistry. The Model 270 Electrochemical Analysis software from EG&G Princeton Applied Research is unmatched on all counts—power, versatility, and ease of use. Consider just this small selection of Model 270 advantages: • Both time-tested hardware (Model 273 Potentiostat) and state-of-theart computer environment (IBM platform, pull-down menus) • Automatic control of both the PARC Model 303A SMDE and a selection of microelectrodes • Traditional voltammetry/polarography and fast Square Wave • Easy-to-learn Standard Mode for routine use and feature-rich Expert Mode for finer experimental control So if you typically do ground-breaking research one day and routine measurements the next, say hello to total electrochemistry. Call for information today at 1-609-530-1000.
EG&G PARC P.O. BOX 2565 · PRINCETON, NJ 08543-2565 (609) 530-1000 · FAX: (609) 883-7259 Circle 34 for Literature. Circle 35 for Sales Representative.
ANALYTICAL CHEMISTRY, VOL. 63, NO. 17, SEPTEMBER 1, 1991 • 845 A
