Abstract
A standard type of recording polarograph was modified and improved polarograms were obtained. A buffer with an ethanol content of 90% (v/v) facilitated polarography of C19-, and C21- and C27-ketosteroids in the free state and as the betainyl hydrazones. Some ketonic bile acids were also investigated. A method for the examination of C27-ketosteroids in biological material was developed. The separation of cholestan-3-one and coprostan-3-one as 2:4-dinitrophenylhydrazones is described.