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Determination of organophosphorus pesticides by capillary electrophoresis‐inductively coupled plasma mass spectrometry with collective sample‐introduction technique
Author(s) -
Yang GuiDi,
Xu XueQin,
Shen MinCong,
Wang Wei,
Xu LiangJun,
Chen GuoNan,
Fu FengFu
Publication year - 2009
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200800387
Subject(s) - dimethoate , chromatography , chemistry , detection limit , capillary electrophoresis , analyte , pesticide , dilution , mass spectrometry , sample preparation , resolution (logic) , inductively coupled plasma mass spectrometry , analytical chemistry (journal) , physics , artificial intelligence , computer science , agronomy , biology , thermodynamics
A new method for the determination of organophosphorus pesticides using CE‐ICP‐MS with collective sample‐introduction technique has been developed in this study. The method has been successfully used to separate and determine dimethoate, trichlorfon and glyphosate with an RSD of <5% for migration times ( n =6) and <4% for peak areas ( n =6). The experimental results showed that the collective sample‐introduction considerably reduced the makeup volume and the dilution of analyte, and eventually resulted in a much lower detection limit and a much better electrophoretic resolution. The peak widths and the detection limits of dimethoate, trichlorfon and glyphosate obtained with this method are 15–17 s and 0.05–0.07 μg/mL (as compound), respectively. Using this method, we have successfully separated and determined dimethoate, trichlorfon and glyphosate in vegetable sample with a recovery of 90–96%.