除草醚在稻米中残留量测定方法的研究

STUDY ON THE ANALYTICAL METHOD FOR NITROFENE RESIDUE IN RICE

本文报道了一个测定糙米中除草醚残留量的新方法。样品采用二氯甲烷提取,经中性氧化铝和弗罗里硅土混合吸附剂净化,用填充3％OV—17/Gas chrom Q 80—100目气相色谱柱和氮磷检测器测定。试验结果,样品的添加回收率为87.33—91.47％;变异系数为3.36为6.31％;最小检测浓度为0.0212ppm。

New method for analysis of nitrofene in rice was reported in this paper.Rice samples were extracted with dichoromethane. The extracted solution was purified by neutral aluminum oxide arid Florisil mix-up column.The prepared samples was tested with gas chromatography equipped with NPD and 3% OV-17 gas chrom Q 80 -100 mech column. This method was applicable to the determination of nitrofene residue in rice with satisfactory recovery rate ( 87.33-91.47%, variant coefficient from 3.36% to 6.31% )and fine detection limit 0.0212ppm.