title: Simultaneous determination of polar and apolar compounds in environmental samples by a polyaniline/hydroxyl multi-walled carbon nanotubes composite-coated stir bar sorptive extraction coupled with high performance liquid chromatography.
abstract: Developing novel coatings for stir bar sorptive extraction (SBSE) is essential for extending the application of SBSE. Herein, a polyaniline/hydroxyl multi-walled carbon nanotubes (PANi/MWCNTs-OH) composite-coated stir bar was prepared via the adhesion technique for the simultaneous extraction of polar and apolar compounds, and a novel method of PANi/MWCNTs-OH-coated SBSE coupled with high performance liquid chromatography-ultraviolet detection (HPLC-UV) was proposed. To test the extraction performance of PANi/MWCNTs-OH-coated stir bar, phenols, non-steroidal anti-inflammatory drugs, and polychlorinated biphenyls were selected as representatives for polar, semi-polar and apolar compounds, respectively. High enrichment factors (EFs) ranged from 20.4 to 60.4-fold (theoretical EF, 100-fold) for target analytes were achieved, indicating that the proposed method is applicable in simultaneous analysis of the compounds with different polarities. The prepared PANi/MWCNTs-OH-coated stir bar has a good preparation reproducibility and can be reused for 20 times. The limits of detection (LODs, S/N=3) were found to be in the range of 0.09-0.81μg/L. To validate the applicability, the proposed method was successfully applied to the analysis of eight target analytes in Yangtze River water after filtration and in the extract from sediment samples.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Hu
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
authors.forename: Man
authors.initials: M
authors.lastname: He
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
authors.forename: Beibei
authors.initials: B
authors.lastname: Chen
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China. Electronic address: binhu@whu.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Hu
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry; D057230:Limit of Detection; D037742:Nanotubes, Carbon; D010636:Phenols / Q000302:isolation & purification*; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification*; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000814:Aniline Compounds; D000894:Anti-Inflammatory Agents, Non-Steroidal; D037742:Nanotubes, Carbon; D010636:Phenols; D014874:Water Pollutants, Chemical; C416807:polyaniline; D011078:Polychlorinated Biphenyls
keywords: Environmental samples; HPLC–UV; PANi/MWCNTs-OH coating; Simultaneous polar and apolar compounds analysis; Stir bar sorptive extraction