Molecularly imprinted layer-coated silica nanoparticles for selective solid-phase extraction of bisphenol A from chemical cleansing and cosmetics samples.
Molecularly imprinted layer-coated silica nanoparticles for selective solid-phase extraction of bisphenol A from chemical cleansing and cosmetics samples.
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DOI：
10.1016/j.aca.2009.11.008
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发表时间：
2010-01
影响因子：
6.2
通讯作者：
Rong Zhu;Wenhui Zhao;M. Zhai;Fangdi Wei;Zheng Cai;Na Sheng;Qin Hu
中科院分区：
文献类型：
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作者：
Rong Zhu;Wenhui Zhao;M. Zhai;Fangdi Wei;Zheng Cai;Na Sheng;Qin Hu
采用溶胶-凝胶法在二氧化硅纳米粒子载体上制备了双酚A（BPA）分子印迹涂层。采用傅立叶变换红外光谱仪、透射电镜、动态吸附和静态吸附实验对BPA印迹二氧化硅纳米粒子进行了表征。平衡结合常数Ka和表观最大结合位点数Qmax分别为1.25× 105 mL μmol− 1和16.4μmolg−1。BPA分子印迹硅胶纳米粒子固相萃取柱对BPA的选择性高于商用C18-SPE柱。研究结果表明，所制备的双酚A分子印迹二氧化硅纳米粒子具有较高的吸附容量和选择性，并提供了一个快速的动力学重新结合双酚A。将该方法成功地应用于固相萃取中，对洗发水、沐浴露和化妆品中的双酚A进行了选择性富集和测定。
Highly selective molecularly imprinted layer-coated silica nanoparticles for bisphenol A (BPA) were synthesized by molecular imprinting technique with a sol–gel process on the supporter of silica nanoparticles. The BPA-imprinted silica nanoparticles were characterized by fourier transform infrared spectrometer, transmission electron microscope, dynamic adsorption and static adsorption tests. The equilibrium association constant, Ka, and the apparent maximum number of binding sites, Qmax, were estimated to be 1.25×105mLμmol−1and 16.4μmolg−1, respectively. The BPA-imprinted silica nanoparticles solid-phase extraction (SPE) column had higher selectivity for BPA than the commercial C18-SPE column. The results of the study indicated that the prepared BPA-imprinted silica nanoparticles exhibited high adsorption capacity and selectivity, and offered a fast kinetics for the rebinding of BPA. The BPA-imprinted silica nanoparticles were successfully used in SPE to selectively enrich and determine BPA from shampoo, bath lotion and cosmetic cream samples.