Rapid Determination of Nitrogen in Iron and Steel. Part II

Studies on the Colorimetric Determination with Phenol and Hypochlorous Acid (I)

Abstract

A suitable condition for the blue coloration of ammonia in alkalish solution with phenol and hypochlorite was studied by using Pulfrich's photometer. Applying this coloration, a colorimetric determination of nitrogen in iron and steels has been studied after iron and other metals were separated by using sodium hydroxide, and accurate results for several kinds of steels were obtained. The time required for this analysis is about 26-52 minutes.