Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of, Jinan, Jinan, P. R. China.
School of Pharmaceutical Sciences, Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei University of Medicine, Shiyan, P. R. China.
J Sep Sci. 2020 Aug;43(16):3275-3284. doi: 10.1002/jssc.202000047. Epub 2020 Jul 7.
A mesoporous silica was functionalized by carbon nanotubes to enhance the extraction performance. The mesoporous material was coated on stainless steel wires, and three wires were inserted inside of a polyetheretherketone tube for in-tube solid-phase microextraction. The tube was coupled to high-performance liquid chromatography with diode array detection to obtain online analytical system, then its extraction performance was evaluated using eight polycyclic aromatic hydrocarbons as the targets. In order to good sensitivity and accuracy, four conditions were optimized such as sampling volume, sampling rate, methanol content in the sample, and desorption time. Under the optimum conditions, an online analytical method was established and exhibited low limits of detection from 0.005 to 0.050 µg/L, wide linear range of 0.016-20.00 µg/L with acceptable correlation coefficients in 0.9921-0.9999, as well as large enrichment factors in the range of 311-2412. The method was successfully applied to determine trace polycyclic aromatic hydrocarbons in some real water samples including, two kinds of bottled water, tap water, and river water, a few polycyclic aromatic hydrocarbons were detected but none quantified in these samples.
介孔硅通过碳纳米管功能化以增强萃取性能。将介孔材料涂覆在不锈钢丝上，并将三根丝插入聚醚醚酮管内用于管内固相微萃取。将该管与二极管阵列检测高效液相色谱连接以获得在线分析系统，然后使用八种多环芳烃作为目标物来评估其萃取性能。为了获得良好的灵敏度和准确性，优化了四个条件，如采样体积、采样速率、样品中的甲醇含量和洗脱时间。在最佳条件下，建立了在线分析方法，其检出限低至 0.005-0.050μg/L，线性范围宽，在 0.016-20.00μg/L 之间，相关系数在 0.9921-0.9999 之间，富集因子在 311-2412 之间。该方法成功应用于测定一些实际水样中的痕量多环芳烃，包括两种瓶装水、自来水和河水，这些样品中检测到了一些多环芳烃，但均未定量。
