title: A novel fluorinated polyaniline-based solid-phase microextraction coupled with gas chromatography for quantitative determination of polychlorinated biphenyls in water samples.
abstract: Novel polyaniline (PANI) electrodeposited in the presence of fluorinated organic acid was applied as a new conductive polymer-based solid-phase microextraction (SPME) fiber candidate. Polychlorinated biphenyls (PCBs) were selected as representative compounds. Improved temperature resistance (<500 degrees C) and satisfactory extraction efficiency were obtained by introduction of fluorinated organic acid. Extraction efficiency of novel PANI for PCBs was superior to common PANI (synthesized in sulfuric acid) and polythiophene, and comparable to commercial 30 microm PDMS but with thinner stationary, i.e. 10 microm. Quantitative determination of trace PCBs in water samples was carried out using this novel SPME fiber, coupling with selective gas chromatography-microelectron capture detector (GC-microECD). The proposed method provided a linear range of approximately three orders. The detection limits were 0.05 ng L(-1) for PCB 138, 153 and 180, and 0.1 ng L(-1) for PCB 28, 52 and 101, respectively. The method was successfully applied to the analysis of spiked surface water samples with the recoveries from 83.0 to 110.7%.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Wang
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Li
authors.forename: Juan
authors.initials: J
authors.lastname: Zhang
authors.forename: Shifen
authors.initials: S
authors.lastname: Xu
authors.forename: Shaogui
authors.initials: S
authors.lastname: Yang
authors.forename: Cheng
authors.initials: C
authors.lastname: Sun
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000302:isolation & purification; D052617:Solid Phase Microextraction; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D000814:Aniline Compounds; D014874:Water Pollutants, Chemical; C416807:polyaniline; D011078:Polychlorinated Biphenyls