HOU Xiao-long,JI Hao-cheng,ZHOU Yuan,QIAO Jing,ZHANG Wen-fang,JIA Zhen-jun,ZHANG Ying.Rapid Screening of 14 Common Fungicides in Whole Blood Using DART-MS/MS[J].Journal of Instrumental Analysis,2025,44(04):593-601.
HOU Xiao-long,JI Hao-cheng,ZHOU Yuan,QIAO Jing,ZHANG Wen-fang,JIA Zhen-jun,ZHANG Ying.Rapid Screening of 14 Common Fungicides in Whole Blood Using DART-MS/MS[J].Journal of Instrumental Analysis,2025,44(04):593-601. DOI: 10.12452/j.fxcsxb.240717238.
Rapid Screening of 14 Common Fungicides in Whole Blood Using DART-MS/MS
To cope with the rapid screening of common pesticide poisoning cases,a real-time direct analysis tandem mass spectrometry(DART-MS/MS) method for detecting 14 fungicides in whole blood was established. By optimizing the mass spectrometry conditions,pretreatment methods,and DART ion source conditions,the optimal scheme was determined as follows:whole blood samples were subjected to liquid-liquid extraction with ethyl acetate,and the supernatant was taken. Using an automatic sampling device,5 µL of the sample was dipped and scanned in MRM mode under the conditions of positive ion mode,ion source temperature of 300 ℃,grid voltage of 200 V,injection speed of 0.6 mm/s,and ion source to mass spectrometry distance of 1.6 cm. The limit of detection for the 14 fungicides was 0.5-50 ng/mL,and the lower limit of quantification was 1-100 ng/mL; the average recovery was 80.8%-118%,and the average matrix effect was -19%-18%,as well as the intra- and inter-day precision and accuracy of the lower limit of quantification and the low and high concentration quality controls did not exceed 20%,and,except for prochloraz,tetrafluoroimidazole and flubacterazole,the correlation coefficients(
r
2
) were all greater than 0.99. This method was fast,simple,and suitable for the needs of public security business.
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