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Determination of Fe(II) ion and Fe(III) ion by Chemiluminescence Method

화학발광법을 이용한 Fe(Ⅱ)이온과 Fe(Ⅲ)이온의 정량

  • Lee, Sang Hak (Department of Chemistry, Kyungpook National University) ;
  • Nam, Myeong Sik (Department of Chemistry, Kyungpook National University)
  • 이상학 (경북대학교 자연과학대학 화학과) ;
  • 남명식 (경북대학교 자연과학대학 화학과)
  • Published : 2002.12.20

Abstract

A method to determin Fe(II) and Fe(III) ion in aqueous solution by chemiluminescence method using a stopped flow system has been studied. The method is based on the increased chemiluminescence intensity with the addition of Fe(III) ion to a solution of lucigenin and hydrogen peroxide. The effects of KOH concentration, flow rate of reagents, $H_2O_2$ concentration and citric acid concentration used for the masking of Fe(II) ion on the chemilu-minescence intensity have been investigated. The calibration curve for total Fe was linear over the range from 1.0${\times}$$10^{-6}$ M to 1.0${\times}$$10^{-4}$M, coefficient of correlation was 0.996 and the detection limit was 1.0${\times}$$10^{-7}$M under the optimal exper-imental conditions of 4.0 M, 2.0 M, 3.5 mL/min for the concentration of $H_2O_2,$ KOH and flow rate of reagents, respec-tively. The calibration curve for Fe(Ⅲ) was linear over the range from 1.0${\times}$$10^{-6}$M to 1.0${\times}10^{-4}$ M, the coefficient of correlation was 0.997 and the detection limit was 5.0${\times}$$10^{-7}$M under the optimal experimental conditions.

Keywords

Chemiluminescence;Determination of Fe(II);Determination of Fe(III)

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