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Utilizes ASV method to simultaneously measure concentrations of 5 different trace heavy metals. Ultra-high sensitivity and automatic sample feed/discharge measuring cell assures fast, precise results. Reproducibility is 3-to-20%. Range: 0.1 PPB—10 PPM.
Harvey S. Gold
analyze fluorescence spectra of mix tures of polycyclic aromatic hydrocar bons. A S - 0 1 Trace Metal A n a l y z e r
MITSUBISHI CHEMICAL INDUSTRIES LIMITED Instruments Dept.. Mitsubish, Bldg., 5 - 2 . Marunouchi 2-chome. Chiyoda-ku, Tokyo, 100 Japan
Telex: J 2 4 9 0
Cable Address: KASEICO TOKYO
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Glenco 3400 & 3500 Series Liquid C h r o m a t o g r a p h y C o l u m n s
THE CHROMATOGRAPHERS' CHOICE •
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• Diameters from 6mm to 150mm ID - all available in stan dard lengths (15cm to 150cm) "off the shelf." • Operating pressures to 150 psi. • Borosilicate glass construction with polypropylene threaded collars and end plates. • Aqueous and organic solvent systems available. Entire system autoclavable. • Upper end plates with center inlet port and a side vent port which can be used to bleed air and to layer on sample with a long needle or tubing. • Lower end plates with packing support of (10 micron) mesh cloth suspended over a woven grid and retained with snap ring. • 1/8" or 1/16" Teflon Multifit connectors on each end plate for easy connection with polyethylene or teflon tubing. Send today for our complete 60 page catalog of columns, fittings, valves, plungers, and accessories.
GLENCO
G l e n c o Scientific Inc. 2802 White O a k Houston, T e x a s 77007 (713) 861-9123
Liquid Chromatography Specialists Since 1959
CIRCLE 82 O N READER SERVICE CARD
40 A · ANALYTICAL CHEMISTRY, VOL. 50, NO. 1, JANUARY 1978
Search for Organic Contaminants in Water by Battelle An extensive search for potentially harmful organic contaminants in drinking water and advanced wastetreatment water is being conducted at Battelle's Columbus Laboratory for the U.S. Environmental Protection Agency. The object of the $1.5 million, three-year study is to compare con taminants in advanced waste-treat ment plant water and in drinking water from five types of raw water supplies taken from selected regions of the country. The analysis of water will be performed in a series of steps consisting of an initial separation of the water concentrates into different types of organic compounds and then the identification of individual organic compounds. The researchers at Bat telle will be specifically searching for a number of known toxic substances such as TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin) and PCB (polychlorinated biphenyls). Identification will be performed with a computerized, glass capillary GC/MS system. The system is de signed to match the unknown spectra with a collection of authentic refer ence samples of spectra. Once the presence of a potentially harmful com pound is confirmed, quantitative de termination will be carried out by the addition of internal standards and by a technique known as integration of specific ion current. Finally, the na-
