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Microdetermination of sulfate in the presence of phosphate without separation

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Summary

A method for the microestimation of sulfate in the presence of up to a 40-fold excess of phosphate is described. A lead ISE and a double-junction reference electrode are used to monitor the potentiometric titration with 0.01M barium perchlorate in 70%p-dioxane. For P/S ratios up to about 13 a pH of 2.00 is used, while for higher P/S ratios (up to 40) a pH of 1.75 is recommended. A computercontrolled titration system is used for the titration and data processing.

Zusammenfassung

Eine Methode zur Mikrobestimmung von Sulfat in Gegenwart von Phosphat in bis zu 40fachem Überschuß wurde beschrieben. Eine ionenspezifische Bleielektrode und eine doppelpolige Bezugselektrode dienen zur Durchführung der potentiometrischen Titration mit 0,01-m Bariumperchlorat in 70% igem p-Dioxan. Für P/S-Quotienten bis zu ungefähr 13 wird ein pH von 2,00 eingestellt, für höhere P/S-Relationen (bis zu 40) wird ein pH von 1,75 empfohlen. Für die Titration und Datenverarbeitung wird ein System mit Computer-Kontrolle verwendet.

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Authors and Affiliations

  1. Lawrence Livermore Laboratory, University of California, 94550, Livermore, Cal., USA

    Walter Selig

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  1. Walter Selig
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Additional information

This work was performed under the auspices of the U. S. Atomic Energy Commission.

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Selig, W. Microdetermination of sulfate in the presence of phosphate without separation. Mikrochim Acta 64, 665–674 (1975). https://doi.org/10.1007/BF01225628

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  • DOI: https://doi.org/10.1007/BF01225628

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