title: Rapid multiplug filtration cleanup method for the determination of 124 pesticide residues in rice, wheat, and corn.
abstract: A simple and rapid multiplug filtration cleanup method based on multiwalled carbon nanotubes was developed to determine 124 pesticide residues in rice, wheat, and corn, which could be done in a few seconds without conditioning and elution steps. Various combinations of sorbents were optimized for each matrix with a dispersive solid-phase extraction procedure to get a satisfactory recovery and clean-up performance. Good linearity was obtained for all pesticides with calibration curve coefficients larger than 0.9958. Most recoveries for the majority pesticides were between 70 and 120% (n = 5) with relative standard deviations below 20%. The limit of detection was 0.1-1.3 μg/kg, and the limit of quantification was 0.2-4.3 μg/kg for the pesticides in all matrices. The work suggests that the multiplug filtration cleanup method is better than the dispersive solid-phase extraction method and it could be applied to routinely monitor pesticide residues in market samples.
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.
authors.forename: Yongtao
authors.initials: Y
authors.lastname: Han
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.
authors.forename: Le
authors.initials: L
authors.lastname: Song
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zou
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Institute of Pesticide and Environmental Toxicology, Guangxi University, Nanning, P. R. China.
authors.forename: Xuesheng
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.|Institute of Pesticide and Environmental Toxicology, Guangxi University, Nanning, P. R. China.
authors.forename: Canping
authors.initials: C
authors.lastname: Pan
mesh_terms: D005374:Filtration; D037742:Nanotubes, Carbon; D012275:Oryza / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D052616:Solid Phase Extraction; D053719:Tandem Mass Spectrometry; D014908:Triticum / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D010573:Pesticide Residues
keywords: corn; multiplug filtration cleanup; pesticide residues; rice; wheat