title: Rapid analysis of pesticide residues in drinking water samples by dispersive solid-phase extraction based on multiwalled carbon nanotubes and pulse glow discharge ion source ion mobility spectrometry.
abstract: An analytical method based on dispersive solid-phase extraction with a multiwalled carbon nanotubes sorbent coupled with positive pulse glow discharge ion mobility spectrometry was developed for analysis of 30 pesticide residues in drinking water samples. Reduced ion mobilities and the mass-mobility correlation of 30 pesticides were measured. The pesticides were divided into five groups to verify the separation capability of pulse glow discharge in mobility spectrometry. The extraction conditions such as desorption solvent, ionic strength, conditions of adsorption and desorption, the amounts of multiwalled carbon nanotubes, and solution pH were optimized. The enrichment factors of pesticides were 5.4- to 48.7-fold (theoretical enrichment factor was 50-fold). The detection limits of pesticides were 0.01∼0.77 μg/kg. The linear range was 0.005-0.2 mg/L for pesticide standard solutions, with determination coefficients from 0.9616 to 0.9999. The method was applied for the analysis of practical and spiked drinking water samples. All results were confirmed by high-performance liquid chromatography with tandem mass spectrometry. The proposed method was proven to be a commendably rapid screening qualitative and semiquantitative technique for the analysis of pesticide residues in drinking water samples on site.
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zou
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.
authors.forename: Kejia
authors.initials: K
authors.lastname: Gu
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.|Hunan Plant Protection Institute, Changsha, Hunan, China.
authors.forename: Shaowen
authors.initials: S
authors.lastname: Liu
authors.affiliation: Wuhan Syscan Technology Co. Ltd, Wuhan, China.
authors.forename: Yanbing
authors.initials: Y
authors.lastname: Hou
authors.affiliation: Wuhan Syscan Technology Co. Ltd, Wuhan, China.
authors.forename: Jialei
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Wuhan Syscan Technology Co. Ltd, Wuhan, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Xu
authors.affiliation: Institute of Pesticide & Environmental Toxicology, Guangxi University, Nanning, China.
authors.forename: Xuesheng
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.
authors.forename: Canping
authors.initials: C
authors.lastname: Pan
mesh_terms: D002851:Chromatography, High Pressure Liquid; D060766:Drinking Water / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D052616:Solid Phase Extraction / Q000379:methods*; D013057:Spectrum Analysis / Q000379:methods*; D053719:Tandem Mass Spectrometry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D060766:Drinking Water; D037742:Nanotubes, Carbon; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical
keywords: Drinking water; Ion mobility spectrometry; Multiwalled carbon nanotubes; Pesticides