流动注射离子交换分离-火焰原子吸收光谱法连续测定铁的形态
STUDY ON SPECIATION ANALYSIS OF IRON BY FLOW INJECTION-ION EXCHANGE SEPARATION HYPHENATED WITH FAAS
摘 要
研究了一种以NH4F为掩蔽剂掩蔽Fe(Ⅲ),用732型阳离子交换树脂(CSR)吸附Fe(Ⅱ),从而分离测定Fe(Ⅲ)与Fe(Ⅱ)的试验体系.设计了一套新颖的用于该体系的全自动流动注射流路,实现了Fe(Ⅲ)与Fe(Ⅱ)的连续测定.Fe(Ⅲ)和Fe(Ⅱ)的相对标准偏差(n=7)分别为3.37%和1.95%,检出限分别为0.07和0.01 mg·L-1,分析速度为25个样/h.
离子交换
火焰原子吸收光谱法
铁
形态分析
Flow injection
Ion-exchange
FAAS
Iron
Speciation analysis
Abstract
A method of flow injection ion exchange separation followed by flame atomic absorption spectrometry for the speciation analysis of iron was studied in this paper.Iron(Ⅲ) in sample solution was masked by addition of NH4F and Fe(Ⅱ) was adsorbed on the micro column packed with 732# cation exchange resin.The adsorbed Fe(Ⅱ) was then eluted with 6 mol·L-1 HCl solution.Fe(Ⅲ) and Fe(Ⅱ) were successively determined by flame atomic absorption spectrometry.Detection limits of this method were found as 0.07 mg·L-1 for Fe(Ⅲ) and 0.01 mg·L-1 for Fe(Ⅱ),and RSD′s (n=7) of 3.37% for Fe(Ⅲ) and 1.95% for Fe(Ⅱ).Using the proposed method,about 5 samples can be analyzed in an hour.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2005/2/6
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备注郑洪涛(1975-),男,湖北仙桃人,讲师,主要从事分析化学工作.
引用该论文: ZHENG Hong-tao,TANG Zhi-yong,LI Wei,WANG Di-min. STUDY ON SPECIATION ANALYSIS OF IRON BY FLOW INJECTION-ION EXCHANGE SEPARATION HYPHENATED WITH FAAS[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(9): 759～761
郑洪涛,汤志勇,李威,王迪民. 流动注射离子交换分离-火焰原子吸收光谱法连续测定铁的形态[J]. 理化检验－化学分册, 2006, 42(9): 759～761
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参考文献
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【4】田莉玉,刘淑琴,高敏.火焰原子吸收光谱法测定天然水中微量铁的形态[J].理化检验-化学分册,2003,39(5):291．
【5】范华均,李大维.茶汤及河水中铁的形态分析[J].分析试验室,1995,14(6):34．
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