ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 01 JANUARY 2015:

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 matrixmatchedm 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:          40-43

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