News the meeting. Students will not be charged a registration fee. For addi tional information and registration forms, contact: Albert Zlatkis, Chem istry Department, University of Hous ton, Houston, Tex. 77004, 713-749262:!.
An early warning system to detect chemical vapors from newly diseased potatoes has been developed by U.S. Department of Agriculture biochemist Jerry L. Varns. Potatoes and the dis ease-causing organisms that attack them give off unique combinations of volatile substances. For example, volatiles from potatoes having bacte rial soft rot contain higher proportions of ethanol, acetone, and 2-butanone than do volatiles from healthy pota toes. From air samples taken from a storage bin and analyzed by gas chromatography, Varns can detect the presence of disease before it is prev alent enough for humans to smell. With the early warning system, growers and processors can take the potatoes out of storage in time so that most can be used, preventing the loss of hundreds of thousands of dollars in stored potato crops.
Nominations Invited for Dal Nogare Award The Chromatography Forum of the Delaware Valley is seeking nomina tions for the 1983 Dal Nogare Award. The award, given annually for signifi cant contributions to chromatographic theory, instrumentation, or applica tions, will be presented at the 1983 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy. Nominations accompanied by a brief bibliography and list of accomplish ments related to chromatography should be submitted before June 1 to: Theodore I. Wishousky, SmithKline Animal Health Products, 1600 Paoli Pike, West Chester, Pa. 19380.
Free! 1981-1982 Cole-Parmer Catalog Cole-Parmer's 1981-1982 Catalog features everything from beakers to recorder: for your laboratory a n d re search needs. Choose from 440 pages of lab sup plies, precision instruments, research a n d safety equipment including pH meters, pumps, flowmeters a n d tem perature indicators. Fill in the coupon and mail it today. Cole-Parmer Instrument Company 7425 Ν Oak Park Avenue · Chicago. III. 60048
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High Purity Solvent from B U R D I C K & J A C K S O N
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CH 3
A safer alternative to ethyl and iso-propyl ethers* é for use in HPLC and GLC é better results in peroxide sensitive separations é safer and easier to use Use Mt-BE for highly sensitive work where peroxide levels even lower than one ppm cause serious interference by reacting with the sample. Mt-BE is less likely than ethyl and iso-propyl ethers to form dangerous peroxides, and it requires no interfering preservatives. Mt-BE is equivalent to those ethers in ultraviolet transparency (UV cutoff 210 nm), and water content (less than 0.05%). It is less volatile (BP 55°C) and therefore less hazardous to use than ethyl ether. Polarity and water solubility of Mt-BE are similar to that of ethyl ether so that Mt-BE may be used for extractions or wherever ethyl ether is used. Methyl t-Butyl Ether A New Chromatographic Eluent C. J. Little. A D. Dale. J L Whatley and J A Wickings. J. Chromatogr. 169. 381 (1979)
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CIRCLE 35 ON READER SERVICE CARD 474 A · ANALYTICAL CHEMISTRY, VOL. 54, NO. 3, MARCH 1982
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CIRCLE 25 ON READER SERVICE CARD
