Determination of the Limits and Accuracy of Potassium Ferricyanide as an Outside Indicator in the Determination of Iron and a Comparison of this Outside Indicator with Diphenylamine as an Inside Indicator

Abstract

In the volumetric course as offered by the Department of Chemistry of South Dakota State College for the spring term of 1931, we experienced difficulties in the methods which we were using for the determination of iron. The general method used was that of Penny\u27s, using an outside indicator of potassium ferricyanide, and titrating with potassium dichromate