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| Compensation of Two Matrix Modifiers for Matrix Effect in Determination of Pesticide Residues in Vegetable Samples |
| Received:June 16, 2015 |
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| KeyWord:matrix modifier;vegetable sample;pesticide residue;matrix effect |
| Author Name | Affiliation | E-mail | | LIN Xiao-yan | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | | | CAO Zhao-yun | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | | | MOU Ren-xiang | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | | | WU Li | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | | | ZHU Zhi-wei | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | | | CHEN Ming-xue | Rice Product Quality Inspection and Supervision Center, Ministry o f Agriculture, China National Rice Research Institute, Hangzhou 310006, China | cmingxue@126.com |
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| Abstract: |
| A detection method of gas chromatography tandem mass spectrometry for 43 pesticide residues in vegetables was established. Gamma-L-gulonic acid lactone(AP) and D-sorbitol(SLC) used as matrix modifiers for compensation effect of matrix were evaluated. For the majority of organophosphorus pesticides, especially the matrix-sensitive pesticides, such as methamidophos, acephate and omethoate, AP had significant matrix compensation, with an average recovery of 85.8%～116.7% and a relative standard deviation(RSD) of 1.7%～2.5%. For other organophosphorus pesticides, an average recovery of 82.4%～120.7% and a RSD of 0.7%～3.5% could be obtained by adding AP. For regular matrix, AP addition could realize the compensation effect of matrix effect, with recovery rates of 80%～120% for most of pesticides. For organochlorine pesticides in complex matrix, addition of matrix modifiers had obvious compensation effect, and the mixture of AP and SLC had the optimal compensation effect, excepting o, p'-DDT and p, p'-DDT; while for pyrethriods pesticides, the compensation effects of three combinations of two matrix modifiers were not consistent, needing further study. In short, the established method of high sensitive GC-MS/MS combined with matrix modifier addition plus simple and efficient pretreatments could be used for detection of pesticide residues in vegetables and other agricultural products. |
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