期刊
MICROCHIMICA ACTA
卷 182, 期 13-14, 页码 2299-2306出版社
SPRINGER WIEN
DOI: 10.1007/s00604-015-1575-8
关键词
Graphene oxide-Fe3O4; Nanocomposite; Magnetic solid phase extraction; Vibrating sample magnetometer; Flavonoids; High performance liquid chromatography; HPLC
资金
- National Natural Science Foundation of China [81402899]
- Open Project of Key Laboratory of Modern Toxicology of the Ministry of Education [NMUMT201404]
- National Basic Science Personal Training Fund [J0630858]
- Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University
We describe a single-step solvothermal method for the preparation of nanocomposites consisting of graphene oxide and Fe3O4 nanoparticles (GO/Fe3O4). This material is shown to be useful as a magnetic sorbent for the extraction of flavonoids from green tea, red wine, and urine samples. The nanocomposite is taking advantage of the high surface area of GO and the magnetic phase separation feature of the magnetic sorbent. The nanocomposite is recyclable and was applied to the extraction of flavonoids prior to their determination by HPLC. The effects of amount of surfactant, pH value of the sample solution, extraction time, and desorption condition on the extraction efficiency, and the regeneration conditions were optimized. The limits of detection for luteolin, quercetin and kaempferol range from 0.2 to 0.5 nga (TM) mL(-1) in urine, from 3.0 to 6.0 nga (TM) mL(-1) in green tea, and from 1.0 to 2.5 nga (TM) mL(-1) in red wine. The recoveries are between 82.0 and 101.4 %, with relative standard deviations of < 9.3 %.
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