Electrophoresis. Brochure describes automated and manual systems for capillary electrophoresis. The systems feature multiple sample injection modes and a 30-kV, reversible-polarity power supply. 12 pp. Isco 425 Clinical chemistry. "The Instrument Report" from Applied Technology Associates highlights the Reply random access chemistry analyzer. Throughput, daily operation, reagent systems, and stat capabilities are discussed. Olympus 426 X-ray. Bulletin provides information on a detector for X-ray microanalysis that requires no liquid nitrogen; software for generating customized lab reports; and XRF and X-ray microprobe instrumentation. 6 pp. Kevex, Fisons Instruments 428
applications; laser mirrors and coatings; mounts for lenses, windows, and mirrors; and replacement cavity optics. Acton Research Corp. 443
Laboratory equipment. Catalog features HPLC columns, diluters/dispensers, syringes, instrumentation, and valves. 85 pp. Hamilton 431
Computers. Catalog features data acquisition, industrial control and monitoring, video imaging, and communication products for IBM PC-XT, PC-AT, PS/2, and Apple Macintosh II computers and compatible computers. Keithley MetraByte 446
Research products. Catalog contains products for chromatography, sample preparation, high-performance capillary electrophoresis, electroporation, molecular biology, immunochemistry, and liquid handling. 232 pp. Bio-Rad 434
Smarter than the average particle sizer When it comes to characterizing submicron particles, you need to know more than just their average size. That's why you need ZetaSizer 3.
Newsletter. The Supelco Reporter, Vol. IX, No. 4, includes articles on resolution of volatile compounds in drinking water, hydrocarbon separations, and monitoring organophosphorous pesticides in air. Supelco 433
Malvern measurably better.
Catalogs Chromatography. Catalog features adsorbents for analytical and preparative HPLC, classic preparative and column chromatography, TLC, and hydrophobic interaction chromatography. Ion-exchange resins are also listed. ICN Biomedicals 439 Laboratory products. "Alchemist II" includes information on timers, stopwatches, calculators, digital thermometers, humidity and conductivity meters, lab controllers, and computerized notebooks. Fisher Scientific 440 Hardware/software. Catalog features products for instrument control and data acquisition and analysis. Included are tutorials that discuss integration of computer-based instrumentation products into particular applications. National Instruments 441 Standards. Catalog features standards for atomic spectroscopy. Included are single-element calibration standards, CLP multielement standards, ICP mixed standard solutions, interference check standards, and EPA water pollution standards. Perkin-Elmer 442 Optics. Catalog describes excimer and UV laser optics, including lenses; optical filters; monochromators for laser
With ZetaSizer 3, you can study particle size distributions, zeta potentials and electrophoretic mobility spectra in complete detail. By combining multi-angle measurements with Mie theory analysis, it gives you the most accurate, high resolution particle size data possible, even for multimodal samples. But ZetaSizer 3 is not just a particle sizer. It's also the world's most versatile electrophoresis system and will even measure zeta potential and particle size distributions on the same sample in the same cell. There's a cell designed specially for high salt, high conductivity samples while, for hydrocarbons and other low conductivity media, there's a patented high field strength cell. The unique duty cycle operation eliminates all sample heating and polarisation effects and ZetaSizer 3 is specially equipped for accuracy at or near the zero point of charge. The natural broadening of mobility spectra due to diffusion effects is quickly and simply eliminated without wasting time on multiple angle electrophoresis measurements. With the automatic sample handling option and built-in pH measurement, ZetaSizer 3 can be programmed to conduct series of analyses under different conditions and automatically plot results such as zeta potential against pH, particle size versus time and so on. So, if you want something smarter than the average particle sizer, start by contacting Malvern for more details of ZetaSizer 3 and, if you wish, to arrange a demonstration in your laboratory or ours. Malvern Instruments Limited Spring Lane South, Malvern, Worcs. WR141AQ, UK. Telephone: (0684) 892456 Telex: 339679 Fax:(0684)892789 Malvern Instruments Inc. 10 Soutlmlte Rd, Southborough, MA 01772 USA Tel: (508) 4800200 Fax:(508)4609692 Malvern Instruments SA Parc Club De L'Université - 30, Rue Jean Rostand, 91893 Orsay Cedex, France, Tel: (1) 60.19.02.00 Fax: (1) 60.19.13.26
MALVERN
Malvern Instruments GmbH Seestrasse 7, D-8036 Herrsching, Germany Tel: (08152) 2046 Telex: 5270249 Fax: (08152) 4374
CIRCLE 90 ON READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 62, NO. 23, DECEMBER 1, 1990 ·
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