Thin-layer chromatography of urinary 17-oxosteroids using dansylhydrazine as a prelabelling reagent.

Z Tomsová

Index: J. Chromatogr. A. 570(2) , 396-8, (1991)

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Abstract

This paper describes a modification of a high-performance liquid chromatographic method for measurement of 17-oxosteroids in biological fluids for use with thin-layer chromatography and fluorometric scanning detection. After extraction from urine samples with Separon-C18 microcolumns, free oxosteroids were labelled with dansylhydrazine in acetonitrile-acetic acid and chromatographed on silica gel F-254 plates with the solvent system chloroform-methanol (97:3). Linearity of fluorescence detection (Shimadzu CS-9000 densitometer) was obtained between 30 and 1000 ng.