Construction of a portable sample preparation device with a magnetic poly(methacrylic acid‐co‐ethylene dimethacrylate) monolith as the extraction medium and its application in the enrichment of UV filters in water samples |
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| Authors: | Jing Li Li Xu Qiong‐Wei Yu Zhi‐Guo Shi Ting Zhang Yan Liu |
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| Institution: | 1. Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, China;2. Key Laboratory of Analytical Chemistry for Biology and Medicine, Wuhan University, Wuhan, China;3. Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao, China |
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| Abstract: | A portable sample preparation device with a magnetic polymer monolith as the extraction medium was constructed. The monolith was synthesized by polymerizing methacrylic acid and ethylene dimethacrylate around a cylindrical magnet. In this way, the monolith with a magnetic core could be readily attached to the extraction device by magnetism. The constructed device was evaluated for the enrichment of UV filters in water samples, followed by high‐performance liquid chromatographic analysis. The extraction efficiency for the targets was satisfactory with no matrix interference. Good linearities were obtained for the UV filters with the correlation coefficients >0.9986. The limits of detection and quantification for the UV filters were 0.3–0.8 and 1.0–2.4 ng/mL, respectively. The recoveries of the UV filters from the spiked water samples at the concentration of 100 ng/mL were 95.3–101.7%, with relative standard deviations <10%. Accordingly, the proposed portable device was demonstrated to be suitable for on‐site simultaneous sampling, purification, and preconcentration within a single step. |
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| Keywords: | Magnetic polymer monoliths On‐site sample preparation Portable extraction devices |
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