Detect Picogram Levels
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TEMPERATURE CONTROL FOR LC COLUMNS Temperature control in liquid chromatography has generally been neglected. Improved resolution, effi ciency, and precision often result from operation of LC columns at controlled tem peratures above ambient.
With the Coulochem™ Electrochemical Detector Your liquid chromatography system deserves the detector that will do justice to your separation. The Coulochem dual electrode electro chemical detector will provide high selectivity, greater sensitivity, and improved stability for your biological and pharmaceutical separations. Consider: • Greater sensitivity through unique coulometric design which allows the detector to react with virtually 100% of the sample. • High selectivity achieved through the use of dual electrodes which eliminate mobile phase contamin ants to permit interfer ence-free measurement of the compound of interest. • Improved stability with uni que patented cell design which permits rapid equal isation, fast set up, low maintenance, and superior reproducibility. Get all the facts today. Call (617-2750100) or write for our new Coulochem brochure and application notes describing separations of interest to you.
Analyst 8000 Microanalyzer System's fea tures include a multilevel, multilingual com mand structure, digital imaging, color graphics, dual-scale display, fast memory access, voice recognition, and self-diagnostics. The system basis is a dispersive X-ray detector, used in conjunction with scanning electron and transmission electron microscopes for mi croanalysis of all elements in the periodic table from carbon to uranium. Kevex Corp. 402
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Photomacroscope M420 Zoom Trinocular Macroscope is an instrument for low-power observa tion and photography. The highly cor rected macro-zoom objective, with a 1:5 zoom ratio, produces images of su perior quality over a wide 3.9-160X magnification range. Specimen ma nipulation is simplified by the upright and laterally correct image and 54-mm-wide field of view of the macroscope. E. Leitz, Inc. 409
Moisture Analyzer BSP-901 Analyzer System incorporates an RS-232 two-way computer interface, the well-proven Z80 microprocessor, and a rugged IR sensor. It provides con tinuous on-line analysis of moisture, which is read in percent moisture on an LCD eight-digit display, or it can be used for static readings. After calibra tion it is drift free and only requires checking every six months. Berwind In strument Group 410
Bioanalytical Systems offers a low cost column heating system based on a metal block heater and solid state controller. The versatile controller can be used with other heating elements and probes for a variety of laboratory appli cations.
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BIOANALYTICAL SYSTEMS INC.
Purdue Research Park 1205 Kent Avenue West Lafayette, IN 47906
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45 Wiggins Avenue Bedford, Mass. 01730
For more Information on listed Hems, circle the appropriate numbers on one of our Readers' Service Cards
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1280 A · ANALYTICAL CHEMISTRY, VOL. 54, NO. 12, OCTOBER 1982
(317) 463-2505
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