Determination of organophosphorus pesticides by capillary electrophoresis-inductively coupled plasma mass spectrometry with collective sample-introduction technique.
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 microg/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%.
Yang
GuiDi
G
Key Laboratory of Analysis and Detection for Food Safety of Ministry of Education and Department of Chemistry, Fuzhou University, Fuzhou, Fujian, P. R. China.
Xu
XueQin
X
Shen
MinCong
M
Wang
Wei
W
Xu
LiangJun
L
Chen
GuoNan
G
Fu
FengFu
F
D004117:Dimethoate / Q000032:analysis; D019075:Electrophoresis, Capillary / Q000379:methods*; D005998:Glycine / Q000031:analogs & derivatives / Q000032:analysis; D013058:Mass Spectrometry / Q000379:methods*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D012680:Sensitivity and Specificity; D014236:Trichlorfon / Q000032:analysis; D000097797:Glyphosate
D004117:Dimethoate; D005998:Glycine; D009943:Organophosphorus Compounds; D010575:Pesticides; D014236:Trichlorfon; D000097797:Glyphosate