Abstract
A method is described for the analysis of b-lyase metabolites of sulfur mustard, 1-methylsulfinyl-2- [2-(methylthio)ethylsulfonyl]ethane and 1,1'-sulfonylbis [2-(methylsulfinyl)ethane], in human urine. The analytes were concentrated from urine on an ENV+ solid-phase extraction cartridge and analyzed by liquid chromatography-positive ion electrospray-tandem mass spectrometry in the selected reaction monitoring mode. Quantitation was performed against deuterated internal standards. Limits of detection were 0.1-0.5 ng/mL. The metabolites were detected in samples of urine from human casualties of sulfur mustard poisoning. The method provides a simpler alternative to gas chromatography-tandem mass spectrometry analysis, avoiding the need for reduction to less polar analytes.
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