期刊
ANALYTICA CHIMICA ACTA
卷 553, 期 1-2, 页码 21-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2005.08.006
关键词
nicotinoid insecticides; LC-ESI-MS SPE; drinking water
A multianalyte method has been developed for the confirmation and quantification of four neonicotinoids, acetamiprid, imidacloprid, thiacloprid and thiamethoxam in drinking water. These insecticides were extracted from water by solid-phase extraction (SPE) LiChrolut EN. Analytes' determination and quantification were performed by liquid chromatography-mass spectrometry (LC-MS). Extraction efficiency experiments demonstrated the ability of this method to extract nicotinoids from water samples. Confirmatory analysis was carried out by LC-electrospray ionization-mass spectrometry (LC-ESI-MS) instrumentation equipped with a single-quadrupole mass filter. MS data acquisition was performed by two-ion selected ion monitoring (SIM) program. Average recoveries of the four analytes from drinking water samples were in the range of 95 and 104% with relative standard deviations (R.S.D.) < 20%. The limit of quantification (LOQ) for each of the four insecticides was 0.03 mu g L-1. (c) 2005 Elsevier B.V. All rights reserved.
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