title: Au nanoparticles as a novel coating for solid-phase microextraction.
abstract: A novel solid-phase microextraction fiber based on a stainless steel wire coated with Au nanoparticles was prepared and has been applied, coupled with gas chromatography, to the extraction of aromatic hydrophobic organic chemical pollutants in rainwater and soil extract. The solid-phase microextraction fiber exhibited excellent extraction efficiency and selectivity. Effects of extraction time, extraction temperature, ionic strength, stirring rate and desorption conditions were investigated and optimized. Single fiber repeatability and fiber-to-fiber reproducibility were less than 7.90% and 26.40%, respectively. The calibration curves were linear in a wide range for all analytes. Correlation coefficients ranged from 0.9941 to 0.9993. The as-established SPME-GC method was used successfully to two real natural samples. Recovery of analytes spiked at 10 μg L(-1) and 100 μg L(-1) ranged from 78.4% to 119.9% and the relative standard deviations were less than 11.3%.
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Feng
authors.forename: Min
authors.initials: M
authors.lastname: Sun
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Jubai
authors.initials: J
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Jiang
mesh_terms: D000327:Adsorption; D002849:Chromatography, Gas; D006841:Hydrocarbons, Aromatic / Q000032:analysis / Q000302:isolation & purification*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009994:Osmolar Concentration; D012989:Soil Pollutants / Q000032:analysis / Q000302:isolation & purification*; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D006841:Hydrocarbons, Aromatic; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical