In-syringe extraction using compressible and self-recoverable, amphiphilic graphene aerogel as sorbent for determination of phenols
In-syringe extraction using compressible and self-recoverable, amphiphilic graphene aerogel as sorbent for determination of phenols
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使用可压缩且可自恢复的两亲性石墨烯气凝胶作为吸附剂进行注射器内萃取，用于测定酚类物质
DOI：
10.1016/j.talanta.2018.11.038
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发表时间：
2019-04-01
期刊：
影响因子：
6.1
通讯作者：
Lee, Hian Kee
中科院分区：
文献类型：
--
作者：
Tang, Sheng;Sun, Jun;Lee, Hian Kee
石墨烯气凝胶（GAs）作为吸附剂材料已经显示出巨大的前景。然而，本质上疏水的GAs不适合用于高水溶性分析物的提取。此外，缺乏可压缩性限制了GA的可回收性。在这项工作中，一个有趣的类型的水诱导的自恢复的两亲性GA的合成和采用作为吸附剂提取9个优先酚类，列为优先污染物由美国环境保护署，从水溶液样品。水诱导的自恢复性赋予GA海绵的特性，提供高可回收性和长寿命。将气凝胶放入2 mL微量注射器中，用于注射器内萃取酚类。GA表现出两亲性，由于交联的聚乙烯醇。同时，它对水溶性酚类化合物具有选择性。用乙腈从GA中洗脱提取的酚类，并通过高效液相色谱-紫外检测器（HPLC-UV）分析最终提取物。结果表明，该方法的检出限低（0.089-0.015 μ g/L），线性关系良好（r（2）>= 0.9956），相对标准偏差小（
Graphene aerogels (GAs) have demonstrated great promise as sorbent materials. However, the intrinsically hydrophobic GAs are unsuitable for extraction of highly water-soluble analytes. Moreover, lack of compressibility limits the recyclability of GAs. In this work, an interesting type of water-induced self-recoverable amphiphilic GA was synthesized and employed as sorbent to extract nine priority phenols, listed as priority pollutants by the United States Environmental Protection Agency, from aqueous samples. The water-induced self-recoverability gives the GA the characteristic of a sponge, providing high recyclability and long-life. The aerogel was placed in a 2-mL microsyringe for in-syringe extraction of the phenols. The GA exhibits amphiphilicity due to the cross-linking by polyvinyl alcohol. At the same time, it exhibited selectivity to the water-soluble phenols. The extracted phenols were eluted with acetonitrile from the GA and the final extract was analyzed by high-performance liquid chromatography with ultraviolet detection (HPLC-UV). The results showed that this method provided low limits of detection for the phenols (0.089-0.015 mu g/L), good linearity (r(2) >= 0.9956) and low relative standard deviations (