Abstract: High dosage of Daqu used in the winemaking process will lead to pesticide residues in it partially migrate to the wine.Thus contributes to the level of pesticide residues in the finished wine.This study was carried out to realize a simultaneous determination of 23 organophosphorus pesticides in liquor-making Daqu by ultrafiltration combined with gas chromatography-triple quadrupole mass spectrometry (GC-QQQ).The samples were extracted by acetonitrile,followed by QuEChERS--ultrafiltration,and then determination by GC-QQQ.According to the results,there was a good linear relationship between the mass concentration and peak area of the 23 pesticides within the range of 10-1 000 μg/L,with the correlation coefficient (R) of greater than 0.999.Furthermore,at three addition levels,the rate of recovery of sample addition ranged from 85% to 106%,and the relative standard deviations were all less than 10%.Besides,the limits of detection and quantitation of the 23 pesticides were 0.002-0.035 mg/kg and 0.007-0.118 mg/kg, respectively.To sum up, the proposed method in our study is simple and rapid in operation with good reproducibility and high stability, which can meet the detection requirement of 23 pesticide residues in liquor-making Daqu.
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2021, Vol. 47 
