期刊
E-POLYMERS
卷 22, 期 1, 页码 488-504出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/epoly-2022-0034
关键词
core-shell; magnetic molecularly imprinted polymers; 4-methylmethcathinone; extraction; separation
资金
- Shanghai Scientific and Technological Innovation Project [20DZ1200100, 19DZ1201900, 19DZ1201904, 19DZ1200400]
- Program of Shanghai Academic/Technology Research Leader [19XD1432700]
- Shanghai Rising-Star Program [19QB1405200, 21QB1405800]
- Key Projects of Shanghai Science and Technology Commission [21DZ1200200]
- Natural Science Foundation of Shanghai [19ZR1449500, 19ZR1449400, 21ZR1481700]
In this study, a novel material of core-shell structured magnetic molecularly imprinted polymers was successfully prepared for the rapid and selective determination of 4-methylmethcathinone. The material showed significantly higher adsorption capacity and binding selectivity, as well as short equilibrium time and reusability. It has good prospects in the extraction and separation of synthetic cathinones.
In this study, a novel material of core-shell structured magnetic molecularly imprinted polymers (Fe3O4@SiO2@Au (FSA)-MIPs) was successfully prepared for the rapid and selective determination of 4-methylmethcathinone (mephedrone, 4-MMC). The adsorption capacity of FSA-MIPs is 34.7 mg center dot g(-1) at 308 K, which is significantly higher than magnetic non-imprinted polymers profiting from the imprinting effect. The FSA-MIPs have a short equilibrium (20 min) and could be reused more than six times. Moreover, the selectivity coefficients of FSA-MIPs for 4-MMC, 3,4-dimethylmethcathinone, butylone, 4-ethylmethcathinone, acetylfentanyl, and methylene blue are 4.01, 5.65, 7.62, 12.30, and 20.87 respectively, further indicating the markedly enhanced binding selectivity of FSA-MIPs. As an adsorbent, the FSA-MIPs were successfully applied for effective extraction of 4-MMC in three human urine samples with the recovery rates ranging from 85.5-92.6%. The results confirmed that the FSA-MIPs have good prospects in the extraction and separation of synthetic cathinones, which is suitable for further application in the criminal sciences field.
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