Establishment of Gas Chromatographic Method for Determination of Organophosphorus Pesticide Residues in Agastache rugosa
Objective:To establish a gas chromatography method for detecting 12 organophosphorus pesticide residues in Agastache rugosa.Methods:QuEChERS pretreatment technology combined with gel permeation chromatography(GPC)purification,gas chromatography determination and external standard quantitative method were used.Result:The linear relationship of 12 organophosphorus pesticides was good between 0.005 and 0.200 mg·L-1,with a correlation coefficient R2≥0.999 and a detection limit of 0.005 mg·kg-1 to 0.010 mg·kg-1.The average recovery rate is 75%to 106%,and the relative standard deviation is 1.08%to 15.00%.Conclusion:This method has low organic solvent dosage,high recovery rate,and good accuracy,and can be used for rapid detection of 12 organophosphorus pesticide residues in Agastache rugosa.
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