中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (5): 89-91.

• 研究简报 • 上一篇    下一篇

FIA-安培法测定水中的Cr(Ⅲ)和Cr(Ⅵ)

杨建男, 邵明升, 张燕华   

  1. 辽宁大学化学系 110036 沈阳
  • 收稿日期:1992-10-28 修回日期:1993-05-12 出版日期:1993-10-10 发布日期:1993-10-10

FLOW-INJECTION AMPEROMETRIC DETERMINATION OF CHROMIUM(Ⅲ)AND CHROMIUM(Ⅵ)IN WATER

Yang Jiannan, Shao Mingsheng, Zhang Yanhua   

  1. Department of Chemistry, Liaoning University, 110036 Shenyang
  • Received:1992-10-28 Revised:1993-05-12 Published:1993-10-10 Online:1993-10-10

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摘要： 流动注射分析(FIA)测定铬的主要方法有FIA-AAS、FIA-AES和FIA-VIS。Pratt等用铂和金电极流通池、Hwang等用玻璃碳和金电极流通池分别建立了测定Cr(Ⅲ)和Cr(Ⅵ)的FIA安培法,检出限依次是5ng/mL和0.5ng/mL。鉴于Cr(Ⅵ)在负电位下能被还原的性质,我们用廉价的碳作电极材料,用FIA安培法测定了天然水中的痕量铬,结果亦令人满意。

关键词: 铬离子, 测定, FIA安培法, 水

Abstract: A flow-injection amperometric method for the determination of Cr(Ⅲ) and (Ⅵ) in water is established,using a carbon tube flow-through detector. The method is simple,rapid and of low cost.The effects of interfering ions are eliminated with a line-on separation column with strong acid-cation resin. Detection limit under optimized conditions was 0.2ng/mL for Cr (Ⅵ). The determination resuits of trace Cr (Ⅲ) and (Ⅵ) in water were in accordance with those obtained by atomic absorption spectrophotometry in graphite tube furnace.

Key words: chromium ion, determination, FIA-amperometry, water

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