It was found that carbofuran enhances the chemiluminescence reaction between sodium sulphite and Ce(4+) in sulphuric acid, and this formed the basis of a flow-injection system with chemiluminescence detection for determination of carbofuran. Under optimum conditions, the enhanced chemiluminescence intensity was linear, with the concentration of carbofuran in the range 8 x 10(-8)-1.0 x 10(-5) g[sol ]mL, with a detection limit of 2.84 x 10(-8) g[sol ]mL (3 s[sol ]k). The proposed method was applied to the analysis of carbofuran in cabbage, with satisfactory results.

Methyltestosterone (MT) enhanced the chemiluminescence of potassium permanganate-sodium thiosulphate system in sulphuric acid medium, and this was used as the basis of a novel flow-injection chemiluminescence method for the determination of methyltesterone. Under optimum conditions, the linear response of MT was in the range 3.0 x 10(-8)-8.0 x 10(-6) g/mL, and the detection limit for determination of MT was 1.0 x 10(-8) g/mL. The method was applied to the analysis of fish with recovery in the range 88.0-113.8% with an average RSD of 1.66% (n = 8).