REPORT FOR ANALYSTS
INCREASED PRODUCTION
analysis of toxic phosphorus com pounds. Thus, parathion in air has been determined by ultraviolet spec trophotometry involving collection of the sample in 95% alcohol and obtain ing the absorption at 274 ηΐμ. Simi larly, parathion has been analyzed using its infrared absorption in the region of 750 to 1300 cm." 1 These methods re quire isolation of the material to be analyzed prior to spectrophotometry. It has been shown to be possible to de velop both quantitative and qualita tive analytical techniques after ob taining the characteristic infrared spec tra of the various organophosphorus compounds. Both parathion and malathion have been analyzed using polarographic means. The electrolysis is carried out in an acetone-water solution with 0.05Λ' potassium chloride serving as the elec trolyte and 0.01% gelatin as the sup pressor at 25° C. Accuracy to approxi mately 1% is obtained. It is expected that the newly de veloped nuclear magnetic resonance spectrometer may be useful in analyzing complex mixtures of phosphorus-con taining insecticides. In addition radioactivation techniques could be applied to the detection and determination of submicrogram quantities of these ma terials.
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Summary
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The increasing importance of phos phorus-containing materials and their introduction into daily use as plasticizers, petroleum additives, and poly mers will undoubtedly evoke greater interest in the development of highly refined, sensitive, selective, and simple analytical procedures. A great deal of effort has been expended by the U. S. Armj- Chemical Corps in this field but for reasons of national security, many of the more recent advances cannot be di vulged. It is hoped that laboratories throughout the country will take cogni zance of the problem both from a de fensive military as well as a public health hazard point of view and assist in the discovery of basic reactions that may be applied to the detection, identi fication, and determination of these substances. Literature Cited (1) Averell, P. R., Norris, M. V., ANAL. CHEM. 20, 753-6 (1948). J
ALBERENE STONE provides
LOW ABSORBENCY
protection
For further information, circle number 28 A on Readers' Service Card, page 83 A 28 A
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ANALYTICAL CHEMISTRY
(2) Giang, P. Α., Hall, S. Α., Ibid., 23, 1830-4(1951). (3) Kramer, P . N., Gamson, R. M., Abstracts Division of Biological Chemistry, 131st Meeting ACS, April 1957. (4) Schoenemann, R. B. R., tr. by Wheeler, C. I,., U. S. Pept. of Commerce, PB 119887 (August 1944).
