食品科学 ›› 2005, Vol. 26 ›› Issue (7): 163-165.

• 分析检测 • 上一篇    下一篇

断续流动氢化物发生-原子荧光光谱法同时测定茶叶中的痕量铋、镉

 石杰, 宋庆国, 赵开楼, 曹丰璞, 郭玮   

  1. 郑州大学化学系
  • 出版日期:2005-07-15 发布日期:2011-09-19

Determination of Trace Bismuth and Cadmuim in Tea by Hydride Generation Atomic Fluorescence Spectrometry

 SHI  Jie, SONG  Qing-Guo, ZHAO  Kai-Lou, CAO  Feng-Pu, GUO  Wei   

  1. Chemical Department, Zhengzhou University
  • Online:2005-07-15 Published:2011-09-19

摘要: 采用氢化物-原子荧光法测定茶叶中的痕量铋、镉,试验了酸介质和还原剂用量对测定测定的影响,考虑了金属离子的干扰。在最佳测定条件下,检出限分别为Bi:0.0946μg/L、Cd:0.0280μg/L线性范围分别为Bi:0.1~200μg/L、Cd:0.1~100μg/L,平均加标回收率在91.0%~104.2%之间。结果表明本法具有快速、简便、准确等特点。

关键词: 断续流动, 氢化物发生, 原子荧光法, 茶叶, 铋,

Abstract: A method was reported for the determination of trace bismuth and cadmium in the tea by hydride generation atomicfluorescence spectrometry. The effects of acid medium and reducing agent on the determination of Bi and Cd and coexisting elementswere studied. In the given conditions, the detection limits were Bi:0.0946μg/L and Cd:0.0280μg/L respectively. The linear rangesof determination were Bi:0.1~200μg/L and Cd: 0.1~100μg/L respectively. The average recovery was in the range of 96.1%~108.6%. The method was accurate, rapid and convenient with satisfactory results.

Key words: intermittent flow, hydride generation, atomic fluorescence spectrometry, tea, bismuth, cadmium