try. Both also form colored species with thiourea, but ruthenium and osmium are best determined by plasma emission.
Chromatography Problem? Call
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Chromatography Question? Call
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Summary The influence of precious metals extends far into our industrial and social structure. Use of precious metals is vital for the smooth functioning of a number of multibillion-dollar enterprises, including the fields of investments, jewelry, dentistry, photography, and electronics. Nor should we forget the area of precious-metal-bearing catalysts vital for the production of chemicals and petroleum products and for the control of ambient air quality. At every step of the precious metal cycle, analytical requirements ranging from the determination of the composition of products to the control of impurities must be met. Of particular complexity is the analysis of precious metal scrap with its variable composition. The major developments in methodology for the analysis of precious metals have been assisted by the emergence of powerful instrumental tools. The interfacing of chemical and instrumental techniques undoubtedly will be increasingly assisted by the introduction of automation and data processing. Still, despite all the technical advances, it is fascinating to speculate that at some time in the future the electronic scrap that results from work in outer space may be analyzed by techniques conceived more than 3000 years ago. Returning to earth from outer space . . . interested readers can learn of developments in the precious metals field, including analytical techniques, from the International Precious Metals Institute.
If you're working with HPLC, GC, or Capillary GC (or want to know how to switch over to capillary GC, easily and economically) call 800-526-3687*. You'll reach Chrompack, specialists in chromatography * In N.J Call 201-722-8930
chrompack chromatography specialists ' ~"
Chrompack, Inc. PO Box 6795 Bridgewater, NJ 08807 201-722-8930
Silve Kallmann has been with Ledoux & Company since 1942. He became research director in 1950 and a vice-president of the company in 1959. His major professional activity has been concerned with the analysis of metals, alloys, minerals, and ores by chemical and instrumental methods. During the past 15 years his efforts have been directed toward the analysis of precious-metal-bearing substances.
CIRCLE 32 ON READER SERVICE CARD 1028 A .
ANALYTICAL CHEMISTRY, VOL. 56, NO. 9, AUGUST
1984
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