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The voltammetric determination of phosphate and silicate in washing powders

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posted on 16.10.2017 by G.C. Cripps
In this work previous static and flow injection voltammetric methods for the determination of phosphate and silicate have been developed for the determination of total phosphate and soluble silicate in commercial washing powders. The method is based on the electrochemical reduction of heteropoly acids at + 0.3 v. (vs. SCE) at a glassy carbon electrode. Anionic detergents are a constituent of washing powders and are found to reduce markedly the differential pulse voltammetric peak currents obtained for 12-molybdophosphate and 12-molybdosilicate in aqueous solutions. Use of a sample solution 40–50% in ethanol was found to prevent this interference. By this method soluble silicate has been determined in unhydrolysed solutions of washing powders and total phosphate in hydrolysed solutions using both static and flow injection modes. [Continues.]

History

School

  • Science

Department

  • Chemistry

Publisher

© G.C. Cripps

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 2.5 Generic (CC BY-NC-ND 2.5) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by-nc-nd/2.5/

Publication date

1982

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.

Language

en

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