Feng Juanjuan, Wang Xiuqin, Tian Yu, Bu Yanan, Luo Chuannan, Sun Min
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China.
J Chromatogr A. 2017 Sep 29;1517:209-214. doi: 10.1016/j.chroma.2017.07.086. Epub 2017 Jul 29.
Carbon fibers (CFs) were functionalized with graphene oxide (GO) by an electrophoretic deposition (EPD) method for in-tube solid-phase microextraction (SPME). GO-CFs were filled into a poly(ether ether ketone) (PEEK) tube to obtain a fibers-in-tube SPME device, which was connected with high performance liquid chromatography (HPLC) equipment to build online SPME-HPLC system. Compared with CFs, GO-CFs presented obviously better extraction performance, due to excellent adsorption property and large surface area of GO. Using ten polycyclic aromatic hydrocarbons (PAHs) as model analytes, the important extraction conditions were optimized, such as sample flow rate, extraction time, organic solvent content and desorption time. An online analysis method was established with wide linear range (0.01-50μgL) and low detection limits (0.001-0.004μgL). Good sensitivity resulted from high enrichment factors (1133-3840) of GO-CFs in-tube device towards PAHs. The analysis method was used to online determination of PAHs in wastewater samples. Some target analytes were detected and relative recoveries were in the range of 90.2-112%. It is obvious that the proposed GO-CFs in-tube device was an efficient extraction device, and EPD could be used to develop nanomaterials functionalized sorbents for sample preparation.
采用电泳沉积（EPD）法将氧化石墨烯（GO）功能化于碳纤维（CFs）上，用于管内固相微萃取（SPME）。将氧化石墨烯功能化碳纤维（GO-CFs）填充到聚醚醚酮（PEEK）管中，制成管内纤维固相微萃取装置，并与高效液相色谱（HPLC）设备相连，构建在线固相微萃取-高效液相色谱系统。与碳纤维相比，氧化石墨烯功能化碳纤维表现出明显更好的萃取性能，这归因于氧化石墨烯优异的吸附性能和大比表面积。以十种多环芳烃（PAHs）为模型分析物，对样品流速、萃取时间、有机溶剂含量和解吸时间等重要萃取条件进行了优化。建立了一种线性范围宽（0.01 - 50μg/L）、检测限低（0.001 - 0.004μg/L）的在线分析方法。氧化石墨烯功能化碳纤维管内装置对多环芳烃的高富集因子（1133 - 3840）带来了良好的灵敏度。该分析方法用于废水样品中多环芳烃的在线测定，检测到了一些目标分析物，相对回收率在90.2% - 112%范围内。显然，所提出的氧化石墨烯功能化碳纤维管内装置是一种高效的萃取装置，电泳沉积可用于开发用于样品制备的纳米材料功能化吸附剂。
