标题：Highly sensitive copper fiber-in-tube solid-phase microextraction foronline selective analysis of polycyclic aromatic hydrocarbons coupledwith high performance liquid chromatography
作者：Sun, Min ;Feng, Juanjuan ;Bu, Yanan ;Luo, Chuannan
作者机构：[Sun, Min ;Feng, Juanjuan ;Bu, Yanan ;Luo, Chuannan ] Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong (University of Jinan 更多
来源：Journal of Chromatography A
摘要：A fiber-in-tube solid-phase microextraction (SPME) device was developed with copper wire and cop-per tube, which was served as both the substrate and sorbent with high physical strength and goodflexibility. Its morphology and surface properties were characterized by scanning electron microscopyand energy dispersive X-ray spectrometry. It was coupled with high performance liquid chromatography(HPLC) equipment by replacing the sample loop of six-port injection valve, building the online SPME-HPLCsystem conveniently. Using ten polycyclic aromatic hydrocarbons (PAHs) as model analytes, extractionconditions including sampling rate, extraction time, organic content and desorption time were investi-gated and optimized. The copper fiber-in-tube exhibits excellent extraction efficiency toward PAHs, withenrichment factors from 268 to 2497. The established online SPME-HPLC method provides good linearity(0.05-100 μg L-1) and low detection limits (0.001-0.01 μg L-1) for PAHs. It has been used to determinePAHs in water samples, with recoveries in the range of 86.2-115%. Repeatability on the same extractiontube is in the range of 0.6-3.6%, and repeatability among three tubes is in the range of 5.6-20.1%. Comparedwith phthalates, anilines and phenols, the copper fiber-in-tube possesses good extraction selectivity forPAHs. The extraction mechanism is probably related to hydrophobic interaction and π-electron-metalinteraction.
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