摘要
[目的]目前国内关于抗倒胺的检测方法只有SN0532—199繇出口粮谷中抗倒胺残留量检验方法》。该方法前处理步骤操作繁琐且使用大量毒性较高的溶剂。通过优化溶剂、简化前处理等建立了一种用气相色谱仪分析大米中抗倒胺残留量的分析方法。样品经乙腈提取，正己烷去脂和弗罗里硅土柱净化，提取净化液经氯乙酰化后，用配有电子俘获检测器的气相色谱仪进行测定。[结果]建立的残留分析方法在0．02～0．50mg／kg水平的平均添加回收率为86．4％～98．0％，相对标准偏差为4．0％～7．1％，抗倒胺最小检出量为2×10^-10g，最低检测质量分数为0．01mg／kg。【结论】方法准确可靠，能够满足国外对大米抗倒胺残留限量的要求。
[Aims] SN 0532-1996 〈The method for the determination of inabenfide residues for export〉 is the only method for the inabenfide residues at present. Its pre-processing procedure is complicated and too much high toxicity solvent was used.This text has found a gas chromatography analysis method for the inabenfide residues in rice by optimizing solvent and reducing the pre-procdssing procedure.The residue of rice sample was extracted with acetonitrile, and the extract was cleaned up with n-hexane and florisil column. The extract was treated for chloroacetylation. Determination was made by gas chromatograph with electron capture detector. [Results] The average recovery was 86.4-98.0% under 0.02-0.50 mg/kg. The relative standard deviation was 4.0-7.1%. The minimum detectable amount of inabenfide standard was 2.0~ 10-1~ g, and the minimum detectable concentration in rice was 0.01 mg/kg. [Conclusions] This gas chromatography method is nicety and credibility ,and it could satisfy the limited residues of the inabenfide in rice.
出处
《农药》
CAS
北大核心
2011年第1期58-60,共3页
Agrochemicals
基金
国家认证认可监督管理委员会标准修订(2008B266r)
关键词
大米
抗倒胺
氯乙酰化
残留
rice
inabenfide
chloroacetylation
residues
