Studies on the Quality Control by Inter-laboratory Tests of Method for Residue Analysis of Tebuconazole in Banana and Wheat

A residue analysis method was established for Tebuconazole.After mechanical oscillating extracted twice with 10mL acetone in wheat,remove impurities by liquid-liquid partition.Samples extraction was clean up with column,which added neutral Al2O3,then concentrated to be ready for detection with GC-NPD.While mechanical oscillating extracted twice with 30mL acetone,adding 5mL water in banana,then by liquid-liquid partition twice to remove impurities.The samples were concentrated to be ready for detection with GC-NPD.0.025 mg/kg,0.05 mg/kg,0.5 mg/kg of tebuconzole in spiked banana and wheat were analysed by different analysts in inter-laboratory.Validation of the method was assured by accuracy,linearity,precision,sensitivity,specificity,recovery,reproducibility,stabilization of Tebuconazole standard working solution.The results showed they all met the need of the pesticide residue analysis.