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For determinations on the same window in exactly the same position in the spectrophotometer, the relative standard deviation was 0.7 %.(2) Cheesman, G. C. N.; Pollard, K. R. N. "International Polymer Latex Conference"; 10; Plastics and Rubber Institute: London, 1978.(1) Hummel, Dieter 0. "Atlas of Polymer and Plastics Analysis", 2nd ed.;

This paper describes a new procedure for the determination of hydrogen cyanide (HCN) concentrations in air. Airborne HCN is entrained in an impinger containing aqueous alkali and subsequently converted to sodium formate; the latter is quantitatively measured by ion chromatography. The collection procedure, reaction conditions, and chromatographic method are described. Interferences and the use of ion exchange resins for sample clean-up were investigated also. The precision and accuracy of spiked and air samples are presented.