食品科学 ›› 2002, Vol. 23 ›› Issue (1): 111-114.

• 分析检测 • 上一篇    下一篇

毛细管电泳法测定奶粉中的镉、铅和铜

 袁道强   

  1. 郑州轻工业学院食品与生物工程系
  • 出版日期:2002-01-15 发布日期:2012-02-13

Capillary Electrophoresis Analyses of Lead,Cadmium and Copper in Milk Powder

 YUAN  Dao-Qiang   

  • Online:2002-01-15 Published:2012-02-13

摘要: 用毛细管区带电泳(CZE)法测定了奶粉中的镉、铅和铜,在10mmol/L苄胺,10mmol/Lα-羟基乙酸,pH=4.0的电泳介质中,3种离子在12min内得到了分离,用间接紫外吸收法在214nm处进行检测,以外标法定量。对样品进行5次测定,峰面积的RSD小于1.6%,回收率在97.8%~102.2%之间,方法简便、快速、灵敏度高、重现性好、测定成本低。

关键词: 毛细管区带电泳, 间接紫外检测, 镉, 铅,

Abstract: Capillaryzoneelectrophoresis(CZE)wasusedtodetermineLead,CadmiumandCopperinmilkpowder.Inthesolution(pH=4.0)containing10mmol/Lofbenzylamineand10mmol/Lofglycolicacid,3inonicsampleswereseparatedin12min,detectedat214nmbyindirectUVabsorption,andquantifiedexternally.Samplesweredetermined5timeswithRSDlowerthan1.6%and97.8%~102.2%recoverd.Theresultshowedthatthemethodwasconvenientandrapidwithhighsensitivity,goodreproductivityandlowcost.

Key words: Capillary zone electrophoresis , IndirectUV detection , Cadmium , Lead , Copper