DETERMINATION OF CARBAMATE PESTICIDES IN ENVIRONMENTAL SAMPLES AS THEIR TRIFLUORACETYL OR METHYL DERIVATIVES BY USING GAS CHROMATOGRAPHY MASS SPECTROMETRY

摘要

A method for the determination of seven carbamate pesticides in mater and sediment samples is reported. Samples, after extraction and/or a clean-up procedure, mere treated with trifluoroacetic anhydride or diazomethane. The resulting trifluoroacetyl or methyl derivatives were determined by capillary GC-MS with selected-ion monitoring, The carbamates could be determined to levels of 0.05-1.00 ng ml(-1) in water with relative standard deviations (s(r)) or 2.6-22.6% and 10 ng g(-1) in sediment with s(r) values of 5.0-20.3%. The detection limits of the carbamates in water and sediment mere 0.014-0.18 ng ml(-1) and 1.6-4.6 ng g(-1), respectively. Their recoveries from water and sediment were 83-127% and 55-129%,respectively. [References: 11]