液液萃取-气质联用法测定食用植物油中的敌草快含量
Determination of diquat content in edible vegetable oils by liquid-liquid extraction and GC-MS
  
DOI:
中文关键词:  食用植物油  敌草快  液液萃取  气相色谱串联质谱法
英文关键词:edible vegetable oil  diquat  liquid-liquid extraction  GC-MS
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Author NameAffiliation
GU Lijun, LAN Kanghua, HUANG Lei,  
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中文摘要:
      建立了食用植物油中敌草快含量的液液萃取-气质联用测定方法。样品以水为提取溶剂,用硼氢化钠还原,正己烷萃取还原产物,气相色谱串联质谱法测定。结果表明:采用m/z 108作为定量离子,在0.20~10 μg/mL范围内线性关系良好(Y=266.5X-3 326.98,r=0.999 7);在不同添加水平下,菜籽油、大豆油、玉米油的加标回收率在90.6%~93.8%之间,相对标准偏差为0.25%~3.01%。该方法简便准确,可用于食用植物油中敌草快含量的测定。
英文摘要:
      A method for determining the content of diquat in edible vegetable oils was establish. The samples were extracted by deionized water, and reduced by NaBH4. The reduction compounds were extracted by n-hexane and determined by GC-MS. The results showed that in the range of 0.20-10 m/zμg/mL, good linearity(Y=266.5X-3 326.98,r=0.999 7) was obtained using m/z 108 as quantification ion. The recoveries for rapeseed oil, soybean oil and corn oil at different additional levels ranged from 90.6% to 93.8% with relative standard deviations (RSDs) of 0.25%-3.01%. This method had the items of simpleness and accuracy, which could be used for determinting diquat in edible vegetable oils.
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