食品科学 ›› 2017, Vol. 38 ›› Issue (20): 322-326.doi: 10.7506/spkx1002-6630-201720048

• 安全检测 • 上一篇    下一篇

电膜萃取-光度法测定食品中的砷

吴航,姜效军,吕琳琳,艾天   

  1. (1.辽宁科技大学化学工程学院,辽宁?鞍山 114051;2.鞍山师范学院化学与生命科学学院,辽宁?鞍山 114007)
  • 出版日期:2017-10-25 发布日期:2017-09-29
  • 基金资助:
    辽宁鞍山市高端人才培养计划项目(20153743)

Electromembrane Extraction and Spectrophotometric Determination of Arsenic in Food Samples

WU Hang, JIANG Xiaojun, Lü Linlin, AI Tian   

  1. (1. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; 2. School of Chemistry and Life Science, Anshan Normal University, Anshan 114007, China)
  • Online:2017-10-25 Published:2017-09-29

摘要: 应用电膜萃取-紫外-可见分光光度法测定食品中砷。对影响实验的参数进行优化:有机溶剂为邻苯二甲酸二异壬酯在正辛醇溶液中体积分数2.5%、电压70?V、萃取时间15?min、接受相溶液pH?13、搅拌速率700?r/min。砷的检出限为1.5?μg/L,回收率为96%~104%,相对标准偏差(n=5)为0.1%~3.6%。本方法具有选择性好、操作简单、成本低等特点,可用于食品中总砷的分析。

关键词: 电膜萃取, 紫外-可见分光光度法, 钼蓝络合物, 食品,

Abstract: In this study, electro-membrane extraction was used as a highly efficient sample pre-treatment method for the UV-VIS spectrophotometric determination of arsenic (As) in food samples. The influences of experimental parameters were investigated and optimized as follows: organic solvent, 1-octanol containing 2.5% (V/V) disononyl phthalate; applied voltage, 70 V; extraction time, 15 min; pH of acceptor, 13, and stirring rate, 700 r/min. The limit of detection (LOD) of this method was 1.5 μg/L. Average recovery rates for different matrices spiked with As were 96%–104%. The precision, expressed as relative standard deviation (RSD), was 0.1%–3.6%. The method presented in this study exhibited a good selectivity, low cost and simplicity and was applicable to total As in food samples.

Key words: electromembrane extraction, UV-VIS spectrophotometric, molybdenum blue complex, food, arsenic

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