Abstract
An organic solvent-soluble membrane filter (MF) is proposed for the simple and rapid reconcentration with subsequent spectrophotometric determination of trace levels of iron (II) in water. Iron (II) is collected on a nitrocellulose membrane filter as ion associate of an anionic complex, which is formed by iron (II) and Ferrozine and a cation-surfactant. The ion-pair compound and the MF can be dissolved in small volumes of 2-ethoxyethanol and the absorbance of the resulting solution is measured at 560 nm against a reagent blank with molar absorptivity of 4.01 × 104 L mol–1 cm–1. Beer’s law is obeyed over the concentration range 0–10 μg L–1 of iron (II) in water and the detection limit is 0.03 μg L–1 with a 50-fold enrichment factor. The proposed method can satisfactorily be applied to the determination of iron (II) in natural water and sea water.
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Received: 23 June 1998 / Revised: 21 July 1998 / Accepted: 25 August 1998
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Chen, Y., Ding, CM., Zhou, TZ. et al. Organic solvent-soluble membrane filters for the preconcentration and spectrophotometric determination of iron(II) traces in water with Ferrozine. Fresenius J Anal Chem 363, 119–120 (1999). https://doi.org/10.1007/s002160051152
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DOI: https://doi.org/10.1007/s002160051152