ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 46, Number 6
JKCSEZ 46(6)
December 20, 2002 

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, H₂O₂ 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 1.0×10^-6 M to 1.0×10^-4 M, coefficient of correlation was 0.996 and the detection limit was 1.0×10^-7 M under the optimal exper-imental conditions of 4.0 M, 2.0 M, 3.5 mL/min for the concentration of H₂O₂, KOH and flow rate of reagents, respec-tively. The calibration curve for Fe(Ⅲ) was linear over the range from 1.0×10^-6 M to 1.0×10^-4 M, the coefficient of correlation was 0.997 and the detection limit was 5.0×10^-7 M under the optimal experimental conditions.