title: Extraction of trace polychlorinated biphenyls in environmental waters by well-dispersed velvet-like magnetic carbon nitride nanocomposites.
abstract: A velvet-like magnetic carbon nitride nanocomposites synthesized by chemical co-precipitation was used to develop a highly efficient magnetic solid-phase extraction method for the pre-concentration of trace polychlorinated biphenyls (PCBs) in water samples. The advantages of this nanocomposite such as large surface area, good dispersity, low solvent consumption, rapid analyte adsorption (30s) and reusability make it a good sorbent. Factors affecting extraction efficiency were systematically investigated and optimized by response surface methodology (RSM). Under optimal experimental conditions, the limits of detection (LODs S/N=3) of the developed method for PCBs investigated were in the range of 9.0×10-6-5.8×10-5μg/mL. This method was then used for the analysis of four real water samples. Good spiked recoveries over the range of 80.1-118.4%, and RSDs (n=5) of 0.02-3.7% were obtained. This work demonstrated the potential of using this nanocomposite for adsorption, pre-concentration, or even removal of different carbon-based aromatic compounds or other hydrophobic pollutants.
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Li
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
authors.forename: Man
authors.initials: M
authors.lastname: Wang
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China. Electronic address: biwentao@njnu.edu.cn.
authors.forename: Wentao
authors.initials: W
authors.lastname: Bi
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Huang
authors.affiliation: Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China; Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada. Electronic address: chen@chem.ubc.ca.
authors.forename: David Da Yong
authors.initials: DD
authors.lastname: Chen
mesh_terms: D057230:Limit of Detection; D059346:Magnets / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D015203:Reproducibility of Results; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D009570:Nitriles; D014874:Water Pollutants, Chemical; C011206:cyanogen; D011078:Polychlorinated Biphenyls
keywords: Magnetic solid phase extraction; Polychlorinated biphenyls; Rapid adsorption and desorption; Velvet-like carbon nitride