麦饭石对葡萄中农药残留的吸附效果

Adsorption effect of Maifan stone on pesticides residues in grapes

为了检测齐齐哈尔市碾子山产麦饭石对葡萄中残留农药的吸附效果,采用三重四极杆气质联用仪(GC-MS/MS)提供的多反应监测模式(MRM)为检测工具,结合Qu ECh ERS提取净化方法,分析了麦饭石的添加量、颗粒大小以及浸泡时间对葡萄中农药残留的吸附效果。结果表明,齐齐哈尔碾子山产麦饭石具有良好的吸附农药能力,吸附葡萄中残留的灭线磷、久效磷、嘧霉胺和甲基异柳磷四种残留农药范围在15.22%~57.86%之间,浸泡时间对所选取的四种农药吸附率影响极为显著(p<0.001),麦饭石添加量对灭线磷除外的三种农药吸附率影响均极为显著(p<0.001)。本实验结果为开发麦饭石农药残留吸附剂提供了实验基础。

In order to detect the adsorption effect of Maifan stone on the residual pesticide in grapes,the MRM model of GCMS/MS was used as the testing tool,and the extraction method of Qu ECh ERS was used to analyze the adding amount,particle size and treatment time of Maifan stone on the pesticide residues adsorption in grapes.The results showed that Maifan stone from Nianzishan district of Qiqihar had good ability of adsorbing pesticides,and the residue of pesticide residues in the grape was15.22% -57.86%.The effect of soaking time on the adsorption rate of four pesticides was extremely significant（ p〈0.001）.The effect of the addition of calamine on the adsorption rate of the three pesticides except for the line of phosphorus was extremely significant（ p〈0.001）.The experimental results provided an experimental basis for the development of medical stone pesticide residue adsorbent.