磁性β-环糊精分子印迹聚合物用于从水中选择性萃取全氟辛酸。

Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water.

作者信息

Malatji Nompumelelo, Mpupa Anele, Mizaikoff Boris, Nomngongo Philiswa Nosizo

机构信息

Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, PO Box 17011, 2028 Doornfontein, South Africa.

Department of Science and Innovation-National Research Foundation South African Research Chair Initiative (DSI-NRF SARChI) in Nanotechnology for Water, University of Johannesburg, 2028 Doornfontein, South Africa.

出版信息

iScience. 2025 Jul 24;28(8):113205. doi: 10.1016/j.isci.2025.113205. eCollection 2025 Aug 15.

The association of PFOA with low concentrations and complex water matrices has made its direct quantification using sensitive analytical methods such as UHPLC-ESI-MS/MS challenging. This study used a magnetic beta-cyclodextrin-based molecularly imprinted polymer (TWAC-FeO@β-CD-MIP) prepared via surface imprinting on magnetic tea waste activated carbon (TWAC-FeO). Under optimal conditions, the method exhibited a linear range (17-5000 ng/L, R = 0.9990) in real water, with LOD and LOQ of 8.6 ng/L and 29 ng/L, respectively. Precision was high, with intraday and interday %RSD of 2.1% and 3.7%. The adsorbent was reusable for three cycles while maintaining over 60% recovery. Spike recoveries in water samples ranged from 102 to 106% with %RSD <5%, confirming the method's accuracy. The imprinting factor was 5.57, and adsorption followed the Sips isotherm model. This study explored MIPs for PFOA determination in water.

全氟辛酸（PFOA）与低浓度及复杂水基质的关联使得采用超高效液相色谱-电喷雾串联质谱（UHPLC-ESI-MS/MS）等灵敏分析方法对其进行直接定量具有挑战性。本研究使用了一种基于磁性β-环糊精的分子印迹聚合物（TWAC-FeO@β-CD-MIP），该聚合物通过在磁性茶叶废料活性炭（TWAC-FeO）上进行表面印迹制备而成。在最佳条件下，该方法在实际水样中呈现出线性范围（17 - 5000 ng/L，R = 0.9990），检测限（LOD）和定量限（LOQ）分别为8.6 ng/L和29 ng/L。精密度较高，日内和日间相对标准偏差（%RSD）分别为2.1%和3.7%。该吸附剂可重复使用三个循环，同时回收率保持在60%以上。水样中的加标回收率在102%至106%之间，%RSD <5%，证实了该方法的准确性。印迹因子为5.57，吸附遵循Sips等温线模型。本研究探索了用于测定水中PFOA的分子印迹聚合物。