Objective:In order to explore the effect of matrix effect on the accurate quantification of fipronil and its metabolites(fipronil,fipronil sulfoxide and fipronil sulfone)in celery.Methods:The matrix effects of four pesticides in celery were determmated based on this method.Three levels of standard addition experiments(0.02 mg/kg,0.05 mg/kg and 0.10 mg/kg)were carried out.The final data were corrected by different curves,and the effects of different correction methods on the accurate quantification of the data were compared.Results:The linearity of solvent curve and matrix curve of four pesticides was good,and the correlation coefficient was all above 0.99,and the matrix effect of these pesticides could be calculated by the slope.Different pesticides have different matrix effect in celery,and they were responsed matrix enhancement effect.Conclusion:To ensure the accuracy of the final data and reduce the data error,the standard matrix curve can be used to quantify accurate data in daily testing.
维普
万方数据