期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 146, 期 -, 页码 343-352出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.12.259
关键词
Chitosan; Graphene oxide; Alkaloids; Magnetic solid phase extraction
资金
- Technology Research and Application Demonstration of Food Safety Social Co-governance Information [2017YFC1602001]
- Science and technology project of General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China [2016IK296]
- Youth science and technology talents fund project of Chongqing Municipal Science and Technology Commission of the People's Republic of China [cstc2014kjrc-qnrc00002]
- Food and agriculture research fund project [cstc2013yykfB0165]
Chitosan functionalized magnetic graphene oxide nanocomposite (Fe3O4@SiO2@CS/GO) was successfully fabricated via a facile amide reaction between chitosan and graphene oxide. A novel extraction method using Fe3O4@SiO2@CS/GO as nanoadsorbent was developed and applied to the efficient extraction and determination of multiple alkaloids from the complex matrix. The composition and structure of the nanoadsorbent was systematically characterized by various techniques. The nanoadsorbent possesses performances of high efficiency, easy operation, superparamagnetism, environment friendly and economic feasibility. The adsorption mechanism for alkaloids included pi-pi electron-donor-acceptor interaction, cation-pi interaction and hydrogen bonding. The principal parameters influencing extraction procedure such as adsorbent dosage, pH, adsorption time, desorption conditions and regeneration cycles were investigated and optimized. Under the optimized conditions, the method exhibited good linear dynamic range with correlation coefficient (r(2)) higher than 0.997 and the limit of detection (LOD) was among 0.016-0.092 mu g kg(-1). Infra- and inter-day relative standard deviations (RSDs) were <10%. These results indicated that the developed method was successfully applied for simultaneous detection of alkaloids in hotpot. This study provided valuable guidance and effective method for the analysis of alkaloids in intricate interference system. (C) 2020 Elsevier B.V. All rights reserved.
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