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 Mar;42(5):1051-1057. doi: 10.1002/jssc.201801233. Epub 2019 Feb 5.
Natural cotton fiber was applied as a green extraction material for in-tube solid-phase microextraction. Cotton fibers were characterized by scanning electron microscope. A bundle of cotton fibers (685 mg, 20 cm) was directly packed into a polyetheretherketone tube (i.d. 0.75 mm) to get the extraction device. It was connected into high performance liquid chromatography, building an online extraction and dectection system. Through the online analysis system, several polycyclic aromatic hydrocarbons were used as the targets to evaluate the extraction performace of the device. In order to get high extraction efficiency and sensitivity, the extraction and desorption conditions were optimized. Under the optimum conditions, the sensitive analysis method was established, and provided low limits of detection of 0.02 and 0.05 μg/L, good linearity ranges of 0.06-15 and 0.16-15 μg/L, as well as high enrichment factors of 176-1868. The method was applied to the online determination of trace polycyclic aromatic hydrocarbons in snow water and river water, and the relative recoveries corresponding to 2 and 5 μg/L were in the range of 80-116%. The repeatability of extraction and preparation of the device was investigated and the relative standard deviations (n = 3) were less than 3.6 and 5.2%.
天然棉纤维被用作绿色提取材料，用于管内固相微萃取。棉纤维用扫描电子显微镜进行了表征。一束棉纤维（685 毫克，20 厘米）直接填充到聚醚醚酮管（内径 0.75 毫米）中，制成萃取装置。它与高效液相色谱仪相连，建立了在线萃取和检测系统。通过在线分析系统，以几种多环芳烃为目标物，评估了该装置的萃取性能。为了获得高的萃取效率和灵敏度，优化了萃取和解吸条件。在最佳条件下，建立了灵敏的分析方法，检测限低至 0.02 和 0.05 μg/L，线性范围好于 0.06-15 和 0.16-15 μg/L，富集因子高达 176-1868。该方法应用于雪水和河水痕量多环芳烃的在线测定，2 和 5 μg/L 时的相对回收率在 80-116%范围内。考察了装置萃取和制备的重复性，相对标准偏差（n = 3）小于 3.6%和 5.2%。
