Test results using the NIOSH analytical method S362 for ethyl- mercaptan (75081) are reported. The method involves collection on Chromosorb-104, desorption with ethyl-acetate (141786), and analysis by gas chromatography with a flame photometric detector. Chromatographic conditions are provided, and results of tests on collection efficiency, retention time, desorption efficiency and breakthrough rate are discussed. The method was unsatisfactory due to poor recovery rates and reproducibility of the chromatograms.
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