کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5136626 | 1494012 | 2017 | 7 صفحه PDF | دانلود رایگان |
- HPMIPs template with CMA was first synthesized and characterized.
- HPMIPs showed high binding capacity (14.84Â mg/g) and fast binding kinetics (40Â min) for CMA.
- HPMIPs was used as sorbent to extract CMA from apple and orange juices.
- HPMIPs exhibited good selectivity (K'Â >Â 1) and sensitivity (LOD, 0.006Â mg/L) for CMA in complex matrices.
Rapid and selective extraction of target compounds from complex matrices was significantly important for their quantification. Here, hollow porous molecular imprinted polymers (HPMIPs) were prepared using cinnamic acid (CMA) as template, 4-vinylpyridine (4-VP) as functional monomer, and MCM-48 as sacrificial support. Hollow porous structure with large surface area (534.1Â m2/g) made most recognition sites locate on the surface of HPMIPs, resulting in high binding capacity (14.84Â mg/g) and fast kinetic binding (40Â min). In comparison, binding capacity and binding equilibrium time for solid MIPs were 4.01Â mg/g and 16Â h. Equilibrium data fitted well to Freundlich equation, and adsorption process with multi-diffusion mechanisms could be described by pseudo-second order model. In addition, HPMIPs exhibited favorable selectivity. Finally, HPMIPs were successfully used as a molecular sorbent to efficiently and selectively extract CMA from apple and orange juices. Coupling with high-performance liquid chromatography and UV detection (HPLC-UV), the limit of detection for CMA was 0.006Â mg/L, and the recoveries (89.3-103.5%) with RSD values ranged from 4.3% to 8.0% were relatively satisfactory. Results indicated the superiority of HPMIPs in the selective extraction field.
Journal: Journal of Chromatography B - Volumes 1049â1050, 1 April 2017, Pages 1-7