title: Disks solid phase extraction based polypyrrole functionalized core-shell nanofibers mat.
abstract: A novel disks solid phase extraction (SPE) based on polypyrrole (PPy) functionalized core-shell electrospun nanofibers mat was proposed. The performance of the established disks SPE technique was evaluated in the extraction of trace polar analytes from environmental water samples. Disulphonated (acid yellow 9) and monosulphonated azo dyes (acid orange 7 and metanil yellow) were selected as typical model analytes. Under the optimum conditions, detection limits were 0.15-0.3 μg/L for all target analytes and the enrichment coefficients were 106-121. The recoveries of sulfonated azo dyes added to typical environmental water samples were 87.6-112.3%, suggesting that the interferences of the sample matrix did not affect the enrichment. Compared with existing methods, the device in this study showed higher recovery, lower detection limit and better precision. Moreover, the miniaturized disks SPE technique for sample preparation is simple and fast, with significantly reduced sorbent bed mass (2.5 mg) and eluent volume (500 μL). These results indicate that PPy nanofibers mat-based disks SPE may be a promising device that can effectively extract the polar species in water samples.
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
authors.forename: FeiFei
authors.initials: F
authors.lastname: Qi
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
authors.forename: XiaoQing
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
authors.forename: BiYi
authors.initials: B
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China; Suzhou Key Laboratory of Environment and Biosafety, Suzhou 215123, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Rong
authors.affiliation: Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China; State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China; Suzhou Key Laboratory of Environment and Biosafety, Suzhou 215123, China. Electronic address: q_xu68@163.com.
authors.forename: Qian
authors.initials: Q
authors.lastname: Xu
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D004560:Electricity; D057139:Nanofibers / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*; D013451:Sulfonic Acids / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D011108:Polymers; D011758:Pyrroles; D013451:Sulfonic Acids; D014867:Water; C067635:polypyrrole
keywords: Disks solid-phase extraction (SPE); Polypyrrole (PPy) nanofibers mat; Sulfonated azo dyes; Water pollutants