Study on Matrix Effect of Determination of Organophosphorus Pesticide Residue in Root and Tuber Vegetables by Gas Chromatography
Referring to agricultural industry standard NY/T 761-2008,the matrix effect determination of organophosphorus pesticide residue in root and tuber vegetables by gas chromatography was studied in present work.The results showed that different amount of organophosphorus pesticides in same root and tuber vegetables produced different matrix effects.The matrix effects of low concentration organophosphorus pesticides were significantly stronger than that of high concentration organophosphorus pesticides.The matrix effects of different organophosphorus pesticides in the same matrix were obviously different.For example,omethoate exhibited strong matrix effects in root and tuber vegetables,with a maximum of 298%,while dichlorvos exhibited weak matrix effects or no matrix effects.It is recommended that when conducting organophosphorus pesticide residue testing on root and tuber vegetables,scientific and reasonable methods should be used to eliminate or reduce matrix effects,such as using pre-experiments to determine the optimal matrix spiking concentration for result correction,in order to ensure the accuracy and reliability of the test results.
root and tuber vegetablesorganophosphorus pesticidematrix effectgas chromatography
万方数据
维普
