Key Laboratory of Chemistry of Northwestern Plant Resources, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
J Chromatogr A. 2010 Dec 24;1217(52):8079-86. doi: 10.1016/j.chroma.2010.10.089. Epub 2010 Oct 30.
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%.
一种基于镀有金纳米粒子的不锈钢丝的新型固相微萃取纤维被制备出来，并与气相色谱法结合，用于萃取雨水中和土壤提取物中的芳香性疏水性有机化学污染物。固相微萃取纤维表现出优异的萃取效率和选择性。考察并优化了萃取时间、萃取温度、离子强度、搅拌速度和解吸条件的影响。单纤维重复性和纤维间重现性分别小于 7.90%和 26.40%。对于所有分析物，校准曲线在很宽的范围内呈线性。相关系数范围为 0.9941 至 0.9993。所建立的 SPME-GC 方法成功地应用于两个实际的自然样品。在 10 μg L(-1) 和 100 μg L(-1) 浓度下添加分析物的回收率在 78.4%至 119.9%之间，相对标准偏差小于 11.3%。
