食品科学 ›› 2001, Vol. 22 ›› Issue (9): 70-72.

• 分析检测 • 上一篇    下一篇

流动注射液液萃取火焰原子吸收法测痕量铅

 郑群雄   

  1. 杭州商学院食品系
  • 出版日期:2001-09-15 发布日期:2012-02-15

Determination of Trace Pb by Flame Atomic Absorption Spectrometry Associated with Flow Injection on- line Lipuid- Lipuid Extracton

   Zheng-Qun-Xiong   

  • Online:2001-09-15 Published:2012-02-15

摘要: 设计了一种流动注射———MIBK-KI萃取———FAAS测定痕量铅的流路系统。结果表明用该流路系统测铅,操作简单,精度好,与传统手工萃取法比具有改善灵敏度,提高分析速度的优点。

关键词: 流动注射, 液液萃取,

Abstract:  A simple method for determinating trace Pb has been developed. In this work Pb was determined by FAAS using an on- line MIBK liquid- liquid extraction system after Pb2+ being chelated with I- .Manifold parameters and chemical conditions were described in detail.The sampling rate of 20h- 1 could be achieved.The detection limit for Pb was 1.2μ g/ml(3σ )and the relative standard deviation was 3.2% (n=10)at the concentration level of 0.2μ g/ml.

Key words:  , Flow injection on- line Liguid- Liquid extraction Pb;