title: Oriented ZnO nanorods grown on a porous polyaniline film as a novel coating for solid-phase microextraction.
abstract: In this work, oriented ZnO nanorods (ZNRs) were in situ hydrothermally grown on a porous polyaniline (PANI) film to function as a solid-phase microextraction (SPME) coating. Scanning electron microscopy (SEM) study revealed that the majority of oriented ZNRs grew from pores of PANI matrix, which protected the ZNRs from easily peeling off during operation. Furthermore, in this process, a thin layer of PANI was found to cover the ZNRs, which can enlarge the effective surface area of the composite coating. This ZNRs/PANI composite coating combined the merits of both ZNRs and PANI and, thus, has several advantages over that of sole PANI film and ZNRs coating such as improved extraction efficiency for benzene homologues, enhanced mechanical stability and longer service life (over 150 cycles of SPME-GC operation). Coupled with gas chromatography-flame ionization detector (GC-FID), the optimized SPME-GC-FID method was used for the analysis of six benzene homologues in water samples. The calibration curves were linear from 1 to 1000μgL(-1) for each analyte, and the limits of detection were between 0.001 and 0.024μgL(-1). Single fiber repeatability and fiber-to-fiber reproducibility were in the range of 1.3-6.8% and 5.3-11.2%, respectively. The spiked recoveries at 100 and 5μgL(-1) for three environmental water samples were in the range of 79.8-115.4% and 73.7-117.4%, respectively.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum (East China), Qingdao 266555, China. Electronic address: xmuzjb@163.com.
authors.forename: Jingbin
authors.initials: J
authors.lastname: Zeng
authors.forename: Cuiying
authors.initials: C
authors.lastname: Zhao
authors.forename: Fayun
authors.initials: F
authors.lastname: Chong
authors.forename: Yingying
authors.initials: Y
authors.lastname: Cao
authors.forename: Fazle
authors.initials: F
authors.lastname: Subhan
authors.forename: Qianru
authors.initials: Q
authors.lastname: Wang
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Yu
authors.forename: Maosheng
authors.initials: M
authors.lastname: Zhang
authors.forename: Liwen
authors.initials: L
authors.lastname: Luo
authors.forename: Wei
authors.initials: W
authors.lastname: Ren
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Yan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001554:Benzene / Q000032:analysis; D002138:Calibration; D002849:Chromatography, Gas / Q000379:methods; D057230:Limit of Detection; D008855:Microscopy, Electron, Scanning; D043942:Nanotubes; D052617:Solid Phase Microextraction / Q000379:methods*; D013052:Spectrometry, X-Ray Emission; D014874:Water Pollutants, Chemical / Q000032:analysis; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D014874:Water Pollutants, Chemical; C416807:polyaniline; D001554:Benzene; D015034:Zinc Oxide
keywords: BTEX; Gas Chromatography-flame ionization detection; Solid-phase microextraction; ZNRs/PANI composite coating