Author(s)

Nannan Chen, Hongbo Gao, Nengsheng Ye, Qiding Zhong, Zhenghe Xiong, Xuexin Gu

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A rapid method was developed for the determination of 22 pesticides in rice wine. The procedure involved an extraction with acetonitrile and a cleanup step using dispersive solid-phase extraction (d-SPE), and primary-secondary amine (PSA) and octadecylsilane (ODS) were used as sorbents. D-SPE had some advantages over some traditional prepara- tions, especially in time and cost. Both the extraction and cleanup only cost about 15 min per a sample. Then the GC-MS was used for quantitative and qualitative analysis. Matrix-matched standards solution and analyte protectant were compared to decrease the matrix effect, and the former showed a better efficacy. Acceptable linearity was achieved in the range of 0.05 - 0.30 mg/L. After matrix-matched standards calibration, recoveries were between 60 and 140%. For the most of pesticides, precision and repeatability were less than 10% and 16%, respectively. The result indicated that the developed method was suitable for the determination of the multi-pesticides in rice wine.

d-SPE; Rice Wine; Pesticide; GC-MS; Matrix Effect

N. Chen, H. Gao, N. Ye, Q. Zhong, Z. Xiong and X. Gu, "Fast Determination of 22 Pesticides in Rice Wine by Dispersive Solid-Phase Extraction in Combination with GC-MS," American Journal of Analytical Chemistry, Vol. 3 No. 1, 2012, pp. 33-39. doi: 10.4236/ajac.2012.31006.