磁性多孔分子印迹聚合物的有效合成及其用于从苹果汁中高效选择性萃取肉桂酸的研究
Effective synthesis of magnetic porous molecularly imprinted polymers for efficient and selective extraction of cinnamic acid from apple juices.
机构信息
College of Sciences, Central South University of Forestry and Technology, Changsha 410004, PR China; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
出版信息
Food Chem. 2017 Dec 15;237:198-204. doi: 10.1016/j.foodchem.2017.05.086. Epub 2017 May 17.
An effective strategy was proposed to prepare novel magnetic porous molecularly imprinted polymers (MPMIPs) for highly selective extraction of cinnamic acid (CMA) from complex matrices. Characterization and various parameters affecting adsorption and desorption behaviors were investigated. Results revealed adsorption behavior between CMA and MPMIPs followed Freundlich equation adsorption isotherm with a maximum adsorption capacity at 4.35mg/g and pseudo-second-order reaction kinetics with equilibrium time at 60min. Subsequently, MPMIPs were successfully used to selectively extract CMA from apple juice with a relatively satisfactory recovery (92.7-101.4%). Coupling with high-performance liquid chromatography and ultraviolet detection (HPLC-UV), the limit of detection (LOD) for CMA was 0.006µg/mL, and the linear range (0.02-10μg/mL) was wide with correlation coefficient at 0.9995. Finally, the contents of CMA in two kinds of apple juices were determined as 0.132 and 0.120μg/mL. Results indicated the superiority of MPMIPs in the selective extraction field.
提出了一种有效的策略，用于制备新型磁性多孔分子印迹聚合物（MPMIPs），以从复杂基质中高度选择性地提取肉桂酸（CMA）。对其进行了表征，并研究了各种影响吸附和解吸行为的参数。结果表明，CMA 与 MPMIPs 之间的吸附行为符合 Freundlich 方程吸附等温线，最大吸附容量为 4.35mg/g，准二级反应动力学的平衡时间为 60min。随后，MPMIPs 成功地用于从苹果汁中选择性提取 CMA，回收率相对较高（92.7-101.4%）。与高效液相色谱和紫外检测（HPLC-UV）相结合，CMA 的检测限（LOD）为 0.006µg/mL，线性范围（0.02-10µg/mL）较宽，相关系数为 0.9995。最后，测定了两种苹果汁中 CMA 的含量分别为 0.132 和 0.120µg/mL。结果表明，MPMIPs 在选择性提取领域具有优越性。
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