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Kinetic- and catalytic-spectrophotometric determination of iron by pyrogallolphthalein and potassium perdisulphate in non-ionic surfactant micellar medium

Kinetische und katalytisch-spektralphotometrische Eisenbestimmung mit Hilfe von Pyrogallolphthalein und Kaliumperdisulfat in Gegenwart eines nichtionischen Tensids

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  • Spectrometric Methods
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Summary

A simple and highly sensitive spectrophotometric determination of iron with pyrogallolphthalein in a micellar medium of non-ionic surfactant is proposed. This method is based on the kinetic-catalytic action of iron(III) upon the decomposition reaction between pyrogallolphthalein and potassium perdisulphate at pH 2.4–2.9 in the presence of Triton X 100 as a non-ionic surfactant. The calibration graph is linear over the range 10–600 ng iron(III) per 10 ml in spectrophotometry (apparent molar absorption coefficient for decomposition was 1.25×10−6 l per mole per cm at 385 nm). The method was applied to assay and recovery tests for artificial waste water with satisfactory results (recovery 97.6%–103.5%).

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Application of xanthene derivatives in analytical chemistry. Part LXXV. Part LXXIV see ref. [1]

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Mori, I., Fujita, Y., Ikuta, K. et al. Kinetic- and catalytic-spectrophotometric determination of iron by pyrogallolphthalein and potassium perdisulphate in non-ionic surfactant micellar medium. Z. Anal. Chem. 334, 49–52 (1989). https://doi.org/10.1007/BF00481972

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  • DOI: https://doi.org/10.1007/BF00481972

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