Simultaneous determination of N-methylcarbamate and urea pesticides in agricultural products by LC/MS |
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Authors: | Higuchi Masayuki Hanada Yoshifumi Ishikawa Seiichi Ueda Eiichi Takahashi Masanori |
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Affiliation: | Kitakyushu City Institute of Environmental Sciences: 1-2-1, Shinike, Tobata-ku, Kitakyushu, Fukuoka 804-0082, Japan. |
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Abstract: | A simultaneous determination method of 7 N-methylcarbamate and 7 urea pesticides in agricultural products by liquid chromatography/mass spectrometry (LC/MS) has been developed. Under reversed-phase liquid chromatographic conditions, 14 pesticides were analyzed using electrospray ionization (ESI) with simultaneous acquisition of positive ions and negative ions. Fourteen pesticides were extracted with acetone, 10% NaCl solution was added, and the pesticides were re-extracted with dichloromethane. The extract was concentrated under reduced pressure, and dissolved in methanol. The detection limits of 14 pesticides ranged from 0.0012 to 0.0056 microgram/g. The recoveries of pesticides were from 36.5 to 112.5% RSD (n = 3) ranged from 0.5 to 48.1%] for 4 agricultural products. |
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