Analysis of chrysoidine dyes using high-performance thin-layer chromatography and a proposed method for the measurement of chrysoidine Y and R in air samples

Abstract

A method for the analysis of chrysoidine dyes using high-performance thin-layer chromatography is described. The composition of chrysoidine dyes manufactured in the UK is examined and proposals are made for a sampling and analysis scheme to measure the concentrations of the dyes in air. A modification of the technique for screening of the dyes to determine whether o-toluidine was used in their manufacture is also described.