Abstract
This paper describes a method of determining the purity of potassium iodate by constant-current coulometry. The determination can be divided into two steps. First, a Na2S2O3 solution is prepared and its reductive value is determined. Second, the purity value of an oxidimetric quantity of potassium iodate is determined. This paper discusses the conditions of the reaction process and evaluates type A and B standard uncertainty of this method. The expanded relative uncertainty of this method is 0.02% (k=2).
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Received: 15 June 2000 Accepted: 27 December 2001
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Ma, L. Determination of the purity of potassium iodate by constant-current coulometry. Accred Qual Assur 7, 163–167 (2002). https://doi.org/10.1007/s00769-002-0441-7
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DOI: https://doi.org/10.1007/s00769-002-0441-7