Abstract
A flow injection method for the sequential determination of iron(II) and iron(III) was developed. It is based on the differential reaction kinetics of iron(II) and iron(III) with Tiron in a double-injection FI system. The proposed method employs the accelerating action of copper(II) for the oxidation of iron(II) in the presence of Tiron. A linear calibration graph is obtained for iron (II) and iron(III) in the concentration range 1.8 × 10–5– 1.8 × 10–4 mol/L; the throughput of samples is 30 injections/h.
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Received: 22 October 1996 / Revised: 4 December 1996 / Accepted: 10 December 1996
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Endo, M., Abe, S. Sequential flow-injection spectrophotometric determination of iron(II) and iron(III) by copper(II)-catalyzed reaction with Tiron. Fresenius J Anal Chem 358, 546–547 (1997). https://doi.org/10.1007/s002160050465
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DOI: https://doi.org/10.1007/s002160050465