ferent materials as well, including organics, inorganics and pharmaceuticals.
Simultaneous detection of toxic heavy metals in water.
The P.A.R. Corp. Model 174 Polarographic Analyzer is the only instrument in its price range to provide this capability. Its part-per-billion sensitivity permits accurate simultaneous qualitative and quantitative analyses to be performed. Low initial and operating costs and ease of operation make this the instrument of choice where measurements must be performed quickly and easily. These features have been important factors in application of the 174 in the analysis of pharmaceuticals, pollutants, metallurgical samples and a broad variety of analytes.
The curves below show the ability of the P.A.R. Corp. Polarographic Analyzer to accurately determine copper, zinc and lead in a sample of tap water. Pulsed anodic stripping voltammetry was the technique used and concentrations well below U.S. Public Health standards were easily determined. The extreme sensitivity of this technique permits the use of short deposition times.
Techniques possible include dc, pulse and differential pulse polarography, stripping analyses, differential pulse stripping analysis and linear sweep voltammetry. Accessories permit dual cell differential operation, ac polarography and other useful techniques. A complete line of cells and electrodes is also available. Price of the 174 is $2375 including mechanical drop timer.
But if you're not interested in detecting metals, it's important to note that the 174 can analyze hundreds of dif-
SIGNAL
POTENTIAL [EvsSCE]
For the latest information about how this versatile instrument can improve your analytical results phone (609)452-2111 or write Princeton Applied Research Corporation, P.O. Box 2565, Princeton, New Jersey 08540. European sales headquarters: Princeton Applied Research GmbH, D8034 PRINCETON Unterpfaffenhofen, APPLIED Waldstrasse 2, West RESEARCH Germany.
DPAS voltammetry of Princeton tap water in ammonia buffer pH 8.4.
128A CIRCLE 161 O N READER SERVICE CARD
1074 A · ANALYTICAL CHEMISTRY, VOL. 45, NO. 13, NOVEMBER
1973
