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| Rapid Screening and Determination of 43 Pesticide Residues in Tobacco by Gas Chromatography-Time of Flight Mass Spectrometry |
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| DOI： |
| KeyWord:tobacco pesticide QuEChERS electron impact ionization gas chromatography TOF MS |
| Author | Institution |
| SI Xiao-xi,ZHU Rui-zhi，LIU Zhi-hua，MA Xue-ying，ZHU Li，ZHANG Feng-mei,LIU Chun-bo，LU She-ming |
1.云南省烟草化学重点实验室云南中烟工业有限责任公司技术中心;2.云南中烟物资集团有限责任公司 |
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| Abstract: |
| A rapid and accurate method was developed for the analysis of 43 pesticide residues in tobacco based on gas chromatography-time of flight mass spectrometry(GC-TOF MS).By modified QuEChERS method,tobacco samples were extracted with acetone-hexane(1∶1),and cleaned up with primary secondary amine(PSA),then detected by GC-TOF MS.Precise mass database of characteristic ions by TOF MS,coupled with retention time,fragment ion abundance ratios,fragmentation patterns of characteristic fragment ions,isotopic peak clusters were employed for the qualitative identification of pesticides.The quantatative method was established using the matrix matched calibration standards with triphenyl phosphate(TPP) as the internal standard.The results indicated that the linear correlation coefficients(r2) were not less than 0.993 with relative standard deviations(RSD) not more than 9.6%,and quantitation limits of 1.3-5.0 μg/kg.The recoveries of 43 pesticides at three spiked concentration levels ranged from 76.4% to 96.6%.The method is simple,rapid,accurate and sensitive,and is appropriate for the determination of multi-residues in tobacco. |
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