TY - JOUR T1 - [Determination of 17 pyrethroid pesticide residues in vegetables by gas chromatography-mass spectrometry with negative chemical ionization]. AU - Shen,Weijian, AU - Cao,Xiaowen, AU - Liu,Yijun, AU - Zhang,Rui, AU - Fan,Xin, AU - Zhao,Zengyun, AU - Shen,Chongyu, AU - Wu,Bin, PY - 2013/3/5/entrez PY - 2013/3/5/pubmed PY - 2014/4/3/medline SP - 1172 EP - 7 JF - Se pu = Chinese journal of chromatography JO - Se Pu VL - 30 IS - 11 N2 - A method was established for the determination of 17 pyrethroid pesticide residues in vegetables using QuEChERS (quick, easy, cheap, effective, rugged and safe) clean-up method and gas chromatography-mass spectrometry (GC-MS) with negative chemical ionization (NCI). The pyrethroid pesticides in the sample were extracted with acetonitrile. After QuEChERS clean-up with a mixture of primary secondary amine and graphitized carbon black packings, the extract was analyzed by GC-NCI-MS in selected ion monitoring (SIM) mode. An isotope internal standard of cypermethrin was employed to the quantification. The limits of quantification ranged from 0.02 to 5 microg/kg. The recoveries of the pyrethroid pesticides spiked in three different matrixes (peas, broccoli and Chinese onion green) at four spiked levels of 10, 20, 30 and 100 microg/kg were from 71.0% to 139.0%, and the relative standard deviations were less than 12.8%. This method can be used as a conclusive evidence method of the 17 pyrethroid pesticide residues in vegetables. SN - 1000-8713 UR - https://www.unboundmedicine.com/medline/citation/23451521/[Determination_of_17_pyrethroid_pesticide_residues_in_vegetables_by_gas_chromatography_mass_spectrometry_with_negative_chemical_ionization]_ L2 - https://medlineplus.gov/foodborneillness.html DB - PRIME DP - Unbound Medicine ER -