食品科学 ›› 2005, Vol. 26 ›› Issue (9): 423-425.

• 分析检测 • 上一篇    下一篇

浓度直读法快速测定碘盐中的微量碘

 高向阳, 冉慧慧, 王翠   

  1. 河南农业大学食品科学学院,河南省职业病防治研究所
  • 出版日期:2005-09-15 发布日期:2011-09-20

The Swift Determination of the Microscale Iodine in Iodo-salt by the Direct-reading Method of Concentration

 GAO  Xiang-Yang, RAN  Hui-Hui, WANG  Cui   

  1. 1.College of Food Science ,Henan Agricultural University; 2.Henan Institute of Occupational Diseases
  • Online:2005-09-15 Published:2011-09-20

摘要: 目的为碘盐中微量碘的测定提供一种直观、快速的测定方法。方法用离子选择性电极浓度直读法测定碘盐中微量的碘。实验对离子强度缓冲调节剂、还原剂的选择及用量,方法回收率、精密度、检出限及干扰进行了探讨,并对实际样品进行了测定。结果方法的加标回收率为95.2%~111.5%,RSD(n=11)为0.9%,检出限为1.10×10-2mg/L。结论方法可靠,结果令人满意。

关键词: 离子选择性电极, 浓度直读法, 碘盐, 微量碘

Abstract: Objective: It afford a visualized and swift method to the determination of the micro-iodine in iodic-salt. Methods: This article adopted ion-selective electrode-direct reading method to determine the iodine in iodic-salt. The experiment re- searched the TISAB, reducing agent, the recovery, the precision and the detection limit and the interference of this method, and the samples was determined. Results: The recovery is 95.2%~111.5%, the RSD( n=11) is 0.9%, the detection limit is 1.10× 10-2mg/L. Conclusions: This method is infallible and the result is satisfying.

Key words: ion-selective electrode, direct-reading method, iodic-salt, micro-iodine