The determination of potassium in soap and mixed caustic lye

Abstract

SummaryThe method of determining potassium as KIO4, as suggested by Willard and Boyle, has been modified and applied to the analysis of soap and caustic lye. The precipitated periodate is completely reduced, and the liberated iodine is titrated with standard thiosulfate. The determination is sensitive to 0.1 mg. of potassium and the analysis of large numbers of samples may be carried out simultaneously in a relatively short time. This, along with the low cost of the reagents, makes the method applicable to industrial control work. An extensive literature search was made and the complete list of references is included.