Study on the Determination of Toxic Chemicals in Exhaust Gas. (IV). GC/MS Determination of Phenylenediamines.:—GC/MS Determination of Phenylenediamines—
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概要
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A method is described to determine <I>o</I>-, <I>m</I>- and <I>p</I>-phenylenediamines (PDs) in exhaust gas. PDs were collected using Sep-Pak Plus PS-2 cartridge conditioned with ethanol and eluted with ethanol. An internal standard decanonitrile was added to the eluate for capillary gas chromatography-mass spectrometry. Applicable water contents of gas samples by the method were less than 1.4% for <I>o</I>- and <I>p</I>-PD and less than 18.3% for <I>m</I>-PD.<BR>The recoveries and their relative standard deviations were more than 91.7% and less than 5.2% respectively on 4 runs. The detection limits were 250-330 μg/m<SUP>3</SUP> for a 10-l volume of gas sample. PDs were detected in exhaust gases from a dye industry in the range 300-620 μg/m<SUP>3</SUP> at the inlet of a scrubber.
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