期刊
MICROCHEMICAL JOURNAL
卷 143, 期 -, 页码 39-46出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.microc.2018.07.029
关键词
Flavonoids; High performance liquid chromatography; Ionic liquid calixarene modified Fe3O4; Magnetic solid phase extraction
资金
- National Natural Science Foundation of China [21605042, 21775140, 21601053]
- Provincial Universities Basic Scientific Research Fund of Henan University of Chinese medicine [2014KYYWF-QN05, 2014KYYWF-QN16]
- Innovation team on diagnosis and treatment of Henoch-Schonlein purpura nephritis in children by Integrated Chinese and Western medicine [18IRTSTHNO28]
A novel magnetic sorbent has been synthesized by co-polymerization of calixarene ionic liquid and mercaptan-modified Fe3O4 particles. This material was used as a sorbent for dispersive solid phase extraction of trace-level flavonoids in the samples of bottled fruit juice and green tea without other pre-treatments. The experimental parameters were investigated and optimized. Coupled with high performance liquid chromatography, an analytical method was established and successfully applied to the determination of flavonoids in these beverages. The proposed method showed good linearity for the analytes with a correlation coefficient (r) > 0.9982, and detection limits for the flavonoids ranged 0.15-0.75 ng mL(-1) were achieved. The proposed method has been used successfully to determine flavonoids in bottled fruit juice and green tea samples with satisfactory recoveries of 92.5-104.8% and relative standard deviations <= 5.2%. The results suggest that poly(calixarene ionic liquid) modified Fe3O4 nanoparticles can be used in the extraction of flavonoids in beverage samples.
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