Determination of trace bisphenol A in environmental water by high-performance liquid chromatography using magnetic reduced graphene oxide based solid-phase extraction coupled with dispersive liquid–liquid microextraction

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• 作者：Danping Li ; Xiaoguo Ma ; Rui Wang ; Yumian Yu
• 关键词：Bisphenol A ; Magnetic reduced graphene oxide ; Solid ; phase extraction ; Dispersive liquid–liquid microextraction ; Gas chromatography–mass spectrometry ; Environmental water
• 刊名：Analytical and Bioanalytical Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：409
• 期：5
• 页码：1165-1172
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Analytical Chemistry; Biochemistry, general; Laboratory Medicine; Characterization and Evaluation of Materials; Food Science; Monitoring/Environmental Analysis;
• 出版者：Springer Berlin Heidelberg
• ISSN：1618-2650
• 卷排序：409

文摘

Bisphenol A (BPA), an endocrine-disrupting chemical, has received much attention from researchers and the general public. In this paper, a novel method of determining BPA at trace levels was developed, using magnetic reduced graphene oxide (rGO-Fe₃O₄)-based solid-phase extraction coupled with dispersive liquid–liquid microextraction (DLLME), followed by high-performance liquid chromatographic determination. The rGO-Fe₃O₄ was prepared and then characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometry. The greatest saturation magnetization of rGO-Fe₃O₄ was up to 43.8 emu g−1, which allowed rapid isolation of the rGO-Fe₃O₄ from solutions upon applying an appropriate magnetic field. The effects of solution pH, adsorbent amount, type and volume of eluent and extraction solvent, extraction time, and salt concentration on the extraction efficiency of BPA were examined and optimized. Under the optimum conditions, an enrichment factor of 5217 and an LOD of 0.01 μg L−1 for BPA were obtained. The reusability of rGO-Fe₃O₄ for at least 12 repeated cycles without any significant decrease in the extraction recovery of BPA was demonstrated. The proposed method was applied to the determination of BPA in different real water samples, with relative recoveries of 84.8–104.9 % and RSDs of 0.8–8.3 % in the spiked concentration range 1–10 μg L−1.