3th WCSET-2014 at Nepal
Special Session at Ho Chi Minh City University of Technology, Vietnam:
Title:
Determination of Dimefluthrin Residue in selected groups
of Food by using a buffered QuEChERS method, followed by
Liquid Chromatography – Mass Spectrometry analysis
Authors:
Phan Nguyen Thu Xuan, Tran Thi Kieu Anh
Abstract:
This paper reports a method for dimefluthrin residue
determination in selected groups of food (vegetable,
fruit, rice and dried fish), where dimefluthrin was
extracted and cleaned using a buffered QuEChERS (Quick,
Easy, Cheap, Effective, Rugged and Safe) method,
followed by LC-MS/MS analysis. The results showed the
matrixmatched calibration curve linearity. The
correlation coefficients were >0.99 in the range of
Dimefluthrin concentrations from 10 to 1000 g/L in
different selected matrix samples. Recoveries (spiked at
three different levels 0.05 mg/kg, 0.1 mg/kg and 0.2
mg/kg) were from 76.8 to 114% and the relative standard
deviations (RSD) were lower than 10%. The method limit
of detection (LOD) was 0.001 mg/Kg and the method limit
of quantitation (LOQ) was 0.003 mg/Kg.The method was
used to analyte dimefluthrin residue in 100 samples of
food. dimefluthrin concentrations were found from non
detection to 6.4 mg/kg.The method is applicable for the
determination of dimefluthrin at trace concentrations.
Keywords: Dimefluthrin,
Pyrethroid pesticide, Buffered QuEChERS, LC-MS/MS
analysis
Pages:
679-686