Journal
JOURNAL OF SEPARATION SCIENCE
Volume 34, Issue 15, Pages 1880-1885Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201100230
Keywords
GC-MS; Organophosphorous pesticides; Pneumatic nebulization; Solvent microextraction; Water analysis
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Organophosphorous pesticides (OPPs) including dichlorvos, diazinon, malathion, phenamiphos and chlorpyrifos, in water samples were extracted by pneumatic nebulization single-drop microextraction (PN-SDME) and then determined by gas chromatography mass spectrometry (GC-MS). Experimental parameters affecting the performances of PN-SDME, such as flow rate of carrier gas, extraction time and micro-drop volume, were examined and optimized. The limits of detection for the analytes were in the range of 0.0014-0.0019 mu g/mL. The linear range was 0.0050-0.50 mu g/mL, except dichlorvos (0.0070-0.50 mu g/mL). Water samples were analyzed and the recoveries of the analytes in the spiked water samples were from 75.2 to 105.3%. The relative standard deviations were lower than 12.7%.
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