Determination of lambda-cyhalothrin in apples and soil by gas chromatography

doi:10.3724/SP.J.1123.2016.05026

Abstract

Abstract:

A modified QuEChERS-gas chromatography method was developed to determine the residues of lambda-cyhalothrin in apples and soil. Moreover, the matrix effects in apples and soil were investigated and evaluated. The apple and soil samples were extracted with acetonitrile and purified by graphitized carbon black (GCB). The linearity of lambda-cyhalothrin was good in the range of 0.05-10 mg/L with correlation coefficients (R²) more than 0.999. The limits of detection and limits of quantification were 0.12-0.15 μg/kg and 0.38-0.50 μg/kg, respectively. With the matrix-matched calibration, the recoveries were 88.29%-97.65% and 80.70%-98.69% in soil and apples, respectively, which were in the acceptable range. Matrix enhancement effects were observed in the apple and soil samples. The established method can be applied on the residual analysis of lambda-cyhalothrin in actual apple and soil samples. The matrix-matched calibration solution can efficiently compensate the matrix effects of the lambda-cyhalothrin in gas chromatography-electron capture detector (GC-ECD) analysis.

Key words: apple, gas chromatography (GC), lambda-cyhalothrin, matrix effect, soil

CLC Number:

O658

CHEN Jiaojiao, ZHANG Jing, WU Sizhuo, ZHANG Guanglong, ZHANG Kankan, HU Deyu. Determination of lambda-cyhalothrin in apples and soil by gas chromatography[J]. Chinese Journal of Chromatography, 2016, 34(10): 1005-1010.

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