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Extraction-spectrophotometric determination of iron with 1,2,4,6-tetraphenylpyridinium perchlorate

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Summary

In 7M hydrochloric acid medium, iron(III) forms an ion-association compound with 1,2,4,6-tetraphenylpyridinium perchlorate (TPPP) which is extractable into isoamyl acetate. The extracted ionpair, which has an Fe: TPPP mole ratio of 1∶1, is used for the spectrophotometric determination of iron (ε=3.10×104l·mole−1· cm−1) in the concentration range 0.1–1.5μg/ml in the organic phase. The interference of a number of foreign ions has been investigated. The method is applicable to the determination of iron in various materials.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Sciences, University of Murcia, Spain

    C. Sánchez-Pedreño, J. A. Ortuño & M. C. Torrecillas

Authors
  1. C. Sánchez-Pedreño
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  2. J. A. Ortuño
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  3. M. C. Torrecillas
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Sánchez-Pedreño, C., Ortuño, J.A. & Torrecillas, M.C. Extraction-spectrophotometric determination of iron with 1,2,4,6-tetraphenylpyridinium perchlorate. Mikrochim Acta 86, 203–210 (1985). https://doi.org/10.1007/BF01197820

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  • DOI: https://doi.org/10.1007/BF01197820

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