Determination of tsumacide residues in vegetable samples using a flow‐injection chemiluminescence method

A sensitive, simple and rapid flow‐injection chemiluminescence (FI–CL) method is described to determine tsumacide pesticide residue based on the CL reaction of the alkaline degradation product of tsumacide with acidic KMnO 4 when rhodamine 6G was present. Under the optimum conditions, the relative CL intensity is linear with the concentration of tsumacide in the range of 2.0 × 10 −3 –0.20 mg/L. The detection limit is 6.6 × 10 −4 mg/L (3 σ ) and the relative standard deviation for 2.0 × 10 −2 mg/L tsumacide solution was 2.28% (intra‐day) and 4.85% (inter‐day). The proposed method has been applied to determine the residue of tsumacide in vegetable samples and the recovery test is very satisfactory. Copyright © 2007 John Wiley & Sons, Ltd.