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. 2021 Apr 12;1642:462003. doi: 10.1016/j.chroma.2021.462003. Epub 2021 Feb 18.
To improve extraction performance of carbon fibers (CFs) towards phthalate esters (PAEs), titanium dioxide (TiO) nanorods array was in-situ grown on the surface of CFs, then polyaniline (PANI) was used to modify it. PANI/TiO nanorods-CFs were placed into a polyetheretherketone tube for solid-phase microextraction (SPME). Combining the tube to high performance liquid chromatography (HPLC), it was evaluated and displayed good extraction performance for several PAEs. Compared with bare CFs, TiO nanorods and PANI, PANI/TiO nanorods presented best performance, attributed to the unique advantages between high surface area of TiO nanorods and multiple adsorption interactions (like π-π stacking, hydrogen bond) of PANI. After the optimization of the important factors (sampling volume, sampling rate, sample pH, concentrations of organic solvent and salt in sample, and desorption time), the online in-tube SPME-HPLC method was established. It provided low limits of detection (0.01-0.05 μg L) and wide linear ranges (0.03-30, 0.10-30, 0.17-30 μg L) with correlation coefficients larger than 0.9991. The relative standard deviations (n=6) between intra-day and inter-day tests were in the ranges of 3.5-10.3% and 4.7-13.9%, respectively. The method was successfully used to determine seven PAEs in real water samples. Besides of satisfactory durability, the material also exhibited superior extraction performance than some materials.
为了提高碳纤维（CFs）对邻苯二甲酸酯（PAEs）的萃取性能，在 CFs 表面原位生长了二氧化钛（TiO）纳米棒阵列，然后用聚苯胺（PANI）对其进行修饰。将 PANI/TiO 纳米棒-CFs 放入聚醚醚酮管中进行固相微萃取（SPME）。将该管与高效液相色谱（HPLC）结合，评估结果显示其对几种 PAEs 具有良好的萃取性能。与裸 CFs、TiO 纳米棒和 PANI 相比，PANI/TiO 纳米棒表现出最佳的性能，这归因于 TiO 纳米棒的高表面积和 PANI 的多种吸附相互作用（如π-π堆积、氢键）的独特优势。在优化重要因素（采样体积、采样速率、样品 pH 值、样品中有机溶剂和盐的浓度以及解吸时间）后，建立了在线管内 SPME-HPLC 方法。该方法提供了较低的检测限（0.01-0.05μg L）和较宽的线性范围（0.03-30、0.10-30、0.17-30μg L），相关系数均大于 0.9991。日内和日间测试的相对标准偏差（n=6）分别在 3.5-10.3%和 4.7-13.9%的范围内。该方法成功用于测定实际水样中的七种 PAEs。除了令人满意的耐用性外，该材料还表现出比某些材料更好的萃取性能。
