Journal
MICROCHIMICA ACTA
Volume 182, Issue 3-4, Pages 737-744Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-014-1381-8
Keywords
g-C3N4; Fe3O4; Solid phase extraction; Phenolic acid
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Funding
- Program of Natural Science Research of Jiangsu Higher Education Institutions of China [2013103TSJ0089]
- National Natural Science Foundation of China [21447003, 21177061]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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We have developed a facile in-situ growth method for the deposition of magnetite (Fe3O4) particles on the surface of a graphitic carbon nitride (g-C3N4) nanosheet. The material was characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The high affinity of g-C3N4 for phenolic acids in combination with the magnetism of Fe3O4 provides an efficient means for magnetic solid phase extraction. The adsorption, desorption and recoveries were examined. Under optimized conditions, the method has limits of detection in the range from 17.5-42.6 ng mL(-1) (at an S/N of 3), and precisions from 2.8-3.8 % (for n = 5). The method was successfully applied to the determination of protocatechuic, caffeic, and ferulic acids in Salicornia herbacea L. plant extracts. Recoveries ranged from 92.4-99.5 %.
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