Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, P. R. China.
J Sep Sci. 2019 Nov;42(21):3363-3371. doi: 10.1002/jssc.201900613. Epub 2019 Sep 20.
Nano-molybdenum trioxide was prepared from nano-molybdenum disulfide by simple firing in muffle furnace. Nano-molybdenum trioxide was used as the extraction coating on the stainless steel wire. Four wires were filled in a polyetheretherketone tube to get an extraction tube. The tube was connected to the six-port valve of a high performance liquid chromatograph, and the online analysis system was constructed. Extraction selectivity of the tube for different types of compounds, including polycyclic aromatic hydrocarbons, plasticizers, estrogens, anilines and neonicotinoids, was studied. Good enrichment ability for polycyclic aromatic hydrocarbons, but the extraction efficiency of others was not satisfactory. Using eight polycyclic aromatic hydrocarbons as the targets, an analytical method was established after optimizing main factors such as sampling volume, sampling rate, methanol content, and desorption time. The established method exhibited wide linear range to 0.016-20.00 μg/L and low limits of detection to 0.005 μg/L, and the enrichment factors can be up to 2443. The method was applied to the detection of trace polycyclic aromatic hydrocarbons in tap water and river water, and a good recovery was obtained. The tube showed good durability and chemical stability, and it still remained good extraction effect after more than 140 run.
纳米三氧化钼由纳米二硫化钼经马弗炉简单煅烧得到。纳米三氧化钼用作不锈钢丝上的萃取涂层。四根金属丝填充在聚醚醚酮管中，得到萃取管。该管连接到高效液相色谱的六通阀上，构建了在线分析系统。研究了该管对不同类型化合物的萃取选择性，包括多环芳烃、增塑剂、雌激素、苯胺和新烟碱类杀虫剂。该管对多环芳烃具有良好的富集能力，但对其他化合物的萃取效率不尽人意。以 8 种多环芳烃为目标物，通过优化采样体积、采样速率、甲醇含量和解吸时间等主要因素，建立了分析方法。该方法的线性范围很宽，可达 0.016-20.00μg/L，检测限低至 0.005μg/L，富集因子可达 2443。该方法应用于自来水中痕量多环芳烃的检测，获得了良好的回收率。该管具有良好的耐用性和化学稳定性，经过 140 多次运行后仍保持良好的萃取效果。
