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Gas chromatographic/mass spectrometric identification of chlorinated and oxygenated cyclohexene artifacts formed
A M Dietrich1, R F Christman, G S Durell
1Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill 27514.
Abstract:
Chlorinated and oxygenated cyclohexene derivatives detected in methylene chloride extracts of chlorinated drinking water were demonstrated to be artifacts produced during sample preparation. Commercial methylene chloride contains cyclohexene as a preservative, and this reacted during the extraction/concentration process to produce microgram amounts of chlorocyclohexene, 2-chlorocyclohexanol, trans-1,2-dichlorocyclohexane, cyclohexenone and cyclohexenol. Quantitative analysis indicated that over 90% of the initial cyclohexene was consumed during the process. Dechlorination of drinking water with sodium arsenite significantly reduced but did not eliminate cyclohexene artifact formation.