[Colorimetric method for the quantitative determination of plasma catalase activity].

HE STUDY OF CATALASE ACTIVITY has been the subject of much investigation and has necessitated the use of very elegant technics. Recently, methods have been introduced which simplified the technics for estimating catalase activity. Among these are the iodimetric titration procedure of Dille and Watkins (1), the use of sodium perborate as a source of hydrogen peroxide (2), and various methods utilizing permanganate titration of undecomposed substrate (3, 4, 5). The purpose of this paper is to present a colorimetric method for the estimation of catalase activity which yields accurate, reproducible results, and is simplified so that clinical chemistry laboratories may perform this determination without the need for special equipment.