Li Chunying, Sun Min, Ji Xiangping, Han Sen, Wang Xiuqin, Tian Yu, Feng Juanjuan
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 Jun;42(12):2155-2162. doi: 10.1002/jssc.201900076. Epub 2019 May 6.
Cotton fiber is an environmentally friendly and natural material with a certain extraction capacity, while its enrichment ability is poor. In order to improve the extraction efficiency of cotton fibers, it was carbonized to form a layer of amorphous carbon as the sorbent by a simple carbonization method. Carbonized cotton fibers were filled into a polyetheretherketone tube for in-tube solid-phase microextraction. The carbonization time was investigated to obtain high extraction efficiency. Coupled to high-performance liquid chromatography, the extraction tube was evaluated with polycyclic aromatic hydrocarbons, estrogens and phthalates, and it exhibited best extraction efficiency for polycyclic aromatic hydrocarbons. Under the optimum conditions, an online analysis method for several polycyclic aromatic hydrocarbons was established with large linear ranges (0.016-0.20 μg/L), low limits of detection (0.005-0.020 μg/L), and high enrichment factors (948-2874). Analysis method was successfully applied to the detection of targets in the real samples and shown satisfactory durability and chemical stability. Moreover, the relative recoveries ranged from 82 to 119.2%, which demonstrated the applicability of carbonized cotton fibers in sample preparation. Compared with other reported methods, the proposed method provided shorter extraction time, higher enrichment factors, comparable limits of detection, and recoveries.
棉纤维是一种具有一定萃取能力的环保天然材料，但其富集能力较差。为提高棉纤维的萃取效率，通过简单的碳化方法将其碳化形成一层无定形碳作为吸附剂。将碳化棉纤维填充到聚醚醚酮管中用于管内固相微萃取。研究了碳化时间以获得高萃取效率。与高效液相色谱联用，用多环芳烃、雌激素和邻苯二甲酸酯对萃取管进行评估，结果表明其对多环芳烃的萃取效率最佳。在最佳条件下，建立了一种针对几种多环芳烃的在线分析方法，该方法具有较大的线性范围（0.016 - 0.20 μg/L）、较低的检测限（0.005 - 0.020 μg/L）和较高的富集因子（948 - 2874）。该分析方法成功应用于实际样品中目标物的检测，具有令人满意的耐用性和化学稳定性。此外，相对回收率在82%至119.2%之间，这证明了碳化棉纤维在样品制备中的适用性。与其他已报道的方法相比，该方法具有更短的萃取时间、更高的富集因子、相当的检测限和回收率。
