Marine College, Shandong University, Weihai 264209, PR China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, PR China.
Mar Pollut Bull. 2021 Feb;163:111962. doi: 10.1016/j.marpolbul.2020.111962. Epub 2021 Jan 12.
A comprehensive strategy for manufacturing a novel sorbent based on magnetic molecularly imprinted polymers (MMIPs) is addressed for selective capture of oxytetracycline from seawater. The novel MMIPs were synthesized by nano-FeO as sacrificial matrix and adsorption properties of the polymers demonstrate rapid adsorption kinetics, high adsorption capacity, and specificity towards oxytetracycline provided by the core-shell composite structure. After screening the critical parameters by multivariate optimization, a magnetic imprinting solid phase extraction method combined with fluorescence spectrophotometry (MMIP-SPE-FL) was constructed for sensitive determination of oxytetracycline in seawater samples. The results show a good linear response dependence on the spiking concentration of 3-100 μg L, and a satisfactory limit of detection of 0.7 μg L after the MMIP-SPE preconcentration. Seven seawater samples from Jiaozhou bay were analyzed to give recoveries in the range of 89.75-107.65% with relative standard deviation values of less than 5.44% (n = 3).
一种基于磁性分子印迹聚合物（MMIPs）的新型吸附剂的综合制备策略，用于从海水中选择性捕获土霉素。新型 MMIPs 是通过纳米 FeO 作为牺牲基质合成的，聚合物的吸附性能表现出快速吸附动力学、高吸附容量和对核心-壳复合结构提供的土霉素的特异性。通过多元优化筛选关键参数后，构建了一种结合荧光分光光度法的磁性印迹固相萃取法（MMIP-SPE-FL），用于海水中土霉素的灵敏测定。结果表明，在 3-100 μg L 的加标浓度范围内具有良好的线性响应关系，经过 MMIP-SPE 预浓缩后，检测限为 0.7 μg L。对来自胶州湾的 7 个海水样品进行了分析，回收率在 89.75%-107.65%之间，相对标准偏差值小于 5.44%（n = 3）。
