| abstract |
The invention relates to a preparation method of vegetable powder standard substance containing organophosphorus pesticide. The method comprises: step a: mashing vegetables without organophosphorus pesticides into a paste, followed by freeze-drying and crushing to obtain vegetable powder matrix; step b: mixing the vegetable powder matrix, water and the organophosphorus pesticide standard The substances are mixed according to the preset ratio, then freeze-dried and pulverized. The invention can effectively improve the accuracy and reliability of the results, can better detect the effect of laboratory pretreatment, verify the recovery rate, evaluate the detection method, and verify the detection ability of operators. |