DETERMINATION OF CARBOSULFAN IN ORANGES BY HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH POSTCOLUMN FLUORESCENCE

High performance liquid chromatography equipped with post-column fluor escence derivatization provides an automated and specific analytical m ethod for pesticide determination. Carbosulfan, a carbamate pesticide, can be analysed utilizing an existing and proven carbamate system aft er the addition of one additional hydrolytic reactor in-line, Extracti on of this compound from citris crops requires careful handling owing to the volatility and unstable nature of the analyte in acid condition s. This paper describes the necessary instrument modifications and, pr esents a method for carbosulfan extraction. Analyses of orange homogen ates were performed rapidly with recoveries of between 66 and 98% for residue levels between 0.03 and 0.25 mu g kg(-1).