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Flow-injection extraction-spectrophotometric determination of permanganate with the triphenylsulphonium cation

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Summary

Permanganate can be determined spectrophotometrically at 548 nm after flow-injection extraction into chloroform of the ion-associate triphenylsulphonium permanganate. The carrier stream was a pH 6 buffer containing 10% (w/v) ammonium fluoride and the reagent stream was 0.10% (w/v) triphenylsulphonium chloride. The injection rate was 20 h−1. The calibration graph is linear up to 40 μg ml−1 and the detection limit is 1.10 μg ml−1 Mn(VII), based on injection volumes of 250 μl. The system has been applied to the determination of manganese in steels and a cupro-nickel alloy.

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Authors and Affiliations

  1. Department of Analytical Chemistry, The Queen's University of Belfast, BT9 5AG, Belfast, Great Britain

    D. Thorburn Burns, S. A. Barakat & M. Harriott

  2. Department of Chemistry, UAE University, P. O. Box 17551, Al-Ain, United Arab Emirates

    M. S. El-Shahawi

Authors
  1. D. Thorburn Burns
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  2. S. A. Barakat
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  3. M. S. El-Shahawi
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  4. M. Harriott
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Thorburn Burns, D., Barakat, S.A., El-Shahawi, M.S. et al. Flow-injection extraction-spectrophotometric determination of permanganate with the triphenylsulphonium cation. Fresenius J Anal Chem 344, 131–132 (1992). https://doi.org/10.1007/BF00325129

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  • DOI: https://doi.org/10.1007/BF00325129

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