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Abstracts-A passive chemical dosimeter for the determination of a long exposure of N substituted aromatic amines in air is described. The analytes are accumulated on a sorption filter by the many hour exposure of a unit using a chemical reaction with a selective reagent. The diffusion coefficients, rate of chemisorption pre concentration, and detection limits of chemical dosimeters are found. The concentrations of N methyl aniline, N,N dimethylaniline, and diphenylamine in air samples are determined.

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