title: Chitosan-poly(m-phenylenediamine)@Fe₃O₄ nanocomposite for magnetic solid-phase extraction of polychlorinated biphenyls from water samples.
abstract: A extraction medium based on chitosan-poly(m-phenylenediamine) (CS-PPD) @Fe3O4 nanocomposite was synthesized by chemical polymerization of m-phenylenediamine in the presence of chitosan coated magnetic nanocomposite, and for the first time, used as the sorbent for the magnetic solid-phase extraction (MSPE) of seven polychlorinated biphenyls (PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180) at trace levels in water samples. Gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS) was used for PCBs quantification and detection. Several factors related to MSPE efficiencies, such as type and amount of sorbent, extraction time, sample pH, and desorption conditions were investigated. Under the optimized conditions, an excellent linearity was observed in the range of 1.0-200 ng L(-1) for PCB180, 0.5-200 ng L(-1) for the other six PCBs with the correlation coefficients ranging from 0.9954 to 0.9993. The good recoveries at spiked levels of 10.0, 20.0, and 50.0 ng L(-1) were obtained in the range of 94%-108%, and the coefficients of variations were less than 6%. The proposed method was feasible, rapid, and easy to operate for the trace analysis of the PCBs in local aquaculture water, livestock breeding water, and sewage water samples.
authors.affiliation: Laboratory of Quality and Safety Risk Assessment of Livestock and Poultry Products (Nanchang), Ministry of Agriculture, Agricultural Product Quality Safety and Standards Institute, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China.
authors.forename: Qie Gen
authors.initials: QG
authors.lastname: Liao
authors.forename: Dong Gen
authors.initials: DG
authors.lastname: Wang
authors.forename: Lin Guang
authors.initials: LG
authors.lastname: Luo
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods*; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry / Q000648:ultrastructure; D010655:Phenylenediamines / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000737:chemistry / Q000302:isolation & purification*; D052616:Solid Phase Extraction / Q000379:methods*; D014462:Ultrafiltration / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D058185:Magnetite Nanoparticles; D010655:Phenylenediamines; D014874:Water Pollutants, Chemical; C435915:poly(1,3-phenylenediamine); D048271:Chitosan; D011078:Polychlorinated Biphenyls