食品科学 ›› 2006, Vol. 27 ›› Issue (11): 412-414.

• 分析检测 • 上一篇    下一篇

Luminol-KMnO4化学发光新体系测定小麦中的微量砷

 刘炎超,  高向阳   

  1.  河南农业大学食品科学技术学院食品安全系
  • 出版日期:2006-11-15 发布日期:2011-11-28

Determination of Micro-Arsenic in Wheat by Luminol-KMnO4 Chemiluminescence System

 LIU  Yan-Chao,   Gao-Xiang-Yang   

  1. Department of Food Safety,College Food of Science and Technology,Henan Agricultural University,Zhengzhou 450002,China
  • Online:2006-11-15 Published:2011-11-28

摘要:  目的:研究一种快速测定小麦中砷的方法,为小麦的安全监测提供一种方便快速的分析技术。方法:基于As3+定量还原KMnO4的反应和Luminol-KMnO4化学发光反应相偶合,建立了化学发光法测定小麦中总砷的方法。结果:该法的检出限为5.0×10-10g/ml,RSD<5%(n=5),线性范围2×10-9~1.4×10-8g/ml,加标回收率为98%~107%。结论:方法用于小麦中总砷的测定,结果满意。

关键词: 偶合化学发光, 微量砷, 小麦

Abstract:  Objective: A new method of chemiluminescence for determining arsenic in wheat is developed. It is a good method for measuring harmful element in wheat. MethodThe method is based on that arsenic reduces potassium permanganate and the reaction is coupled with the chemiluminescence system Luminol-KMnO4. ResultDetection limit of method is 5.0×10-10g/ml and RSD is lower than 5%(n=5). The linearity range of the method is between 2×10-9g/ml and 1.4×10-8g/ml .The recovery of the method is between 98% and 107%. Conclusion: The method has been supplied to determine the arsenic in wheat. The results were satisfactory.

Key words:  , chemiluminescence; micro- arsenic; wheat;