title: Electrodeposition of self-assembled poly(3,4-ethylenedioxythiophene) @gold nanoparticles on stainless steel wires for the headspace solid-phase microextraction and gas chromatographic determination of several polycyclic aromatic hydrocarbons.
abstract: In this work, a novel poly(3,4-ethylenedioxythiophene)@Au nanoparticles (PEDOT@AuNPs) hybrid coating was prepared and characterized. Firstly, the monomer 3,4-ethylenedioxythiophene was self-assembled on AuNPs, and then electropolymerization was performed on a stainless steel wire by cyclic voltammetry. The obtained PEDOT@AuNPs coating was rough and showed cauliflower-like micro-structure with thickness of ∼40μm. It displayed high thermal stability (up to 330°C) and mechanical stability and could be used for at least 160 times of solid phase microextraction (SPME) without decrease of extraction performance. The coating exhibited high extraction capacity for some environmental pollutants (e.g. naphthalene, 2-methylnaphthalene, acenaphthene, fluorene and phenathrene) due to the hydrophobic interaction between the analytes and PEDOT and the additional physicochemical affinity between polycyclic aromatic hydrocarbons and AuNPs. Through coupling with GC detection, good linearity (correlation coefficients higher than 0.9894), wide linear range (0.01-100μgL-1), low limits of detection (2.5-25ngL-1) were achieved for these analytes. The reproducibility (defined as RSD) was 1.1-4.0% and 5.8-9.9% for single fiber (n=5) and fiber-to-fiber (n=5), respectively. The SPME-GC method was successfully applied for the determination of three real samples, and the recoveries for standards added were 89.9-106% for lake water, 95.7-112% for rain water and 93.2-109% for soil saturated water, respectively.
authors.affiliation: Key laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Science, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.affiliation: Key laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Science, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Science, Wuhan University, Wuhan, Hubei 430072, PR China.
authors.forename: Faqiong
authors.initials: F
authors.lastname: Zhao
authors.affiliation: Key laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Science, Wuhan University, Wuhan, Hubei 430072, PR China. Electronic address: bzzeng@whu.edu.cn.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation*; D004595:Electroplating; D004784:Environmental Monitoring / Q000295:instrumentation*; D004785:Environmental Pollutants / Q000032:analysis; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction / Q000295:instrumentation*; D013193:Stainless Steel / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D004785:Environmental Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D013193:Stainless Steel; D006046:Gold
keywords: Au nanoparticles; Electropolymerization; Poly(3,4-ethylenedioxythiophene); Polycyclic aromatic hydrocarbons; Solid phase microextraction