Methyl and Ethyl Mercury Compounds—Recovery from Air and Analysis

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Abstract
Attempts to recover dimethyl or diethylHg vapor by absorption in the reagents usually recommended for collection of Hg from air met with failure. The absorber design, whether impinger or porous glass diffusion type, contributed only minor differences. However, 0.1N iodine monochloride in 0.5M HC1 gave quantitative recoveries of dimethyl and diethyl mercury, monomethyl and monoethyl mercuric chlorides, and Hg vaporized into moving airstreams. The reagent also is applicable to the analysis of mercurial-bearing dusts. Again, the absorber design was not critical, but impinger recoveries were rate-dependent The Teflon permeation tube for SO2 calibration was adopted successfully to the dynamic calibration of microimpingers developed for personnel monitoring.