Journal
TALANTA
Volume 122, Issue -, Pages 91-96Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.01.049
Keywords
Metal-organic frameworks; Graphite oxide; Solid-phase extraction; Luteolin
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Funding
- National Natural Science Foundation of China [21205103, 21275124]
- Jiangsu Provincial Nature Foundation of China [BK2012258]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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A novel solid-phase extraction sorbent, metal-organic frameworks and graphite oxide hybrid composite, was prepared by a solvothermal technique. The morphology and properties of the resultant material were examined by Fourier transform infrared spectroscopy, X-ray diffraction and field emission scanning electron microscopy. To evaluate the extraction performance of the resultant sorbent, luteolin was chosen as a model analyte. The extraction conditions were optimized. Based on these, a convenient and efficient solid-phase extraction procedure for the determination of luteolin was established and the subsequent quantification step was performed by square wave anodic stripping voltammetry. Under the optimal conditions, the oxidation current increased linearly with increasing the concentration of luteolin in the range of 5.0 x 10(-9)-5.0 x 10(-7) mol L-1 with a correlation coefficient of 0.9983 and a detection limit of 7.9 x 10(-10) mol L-1. The relative standard deviation of seven successive scans was 4.20% for 5.0 x 10(-8) mol L-1 luteolin. This work not only proposes a useful method for sample pretreatment, but also reveals the great potential of metal-organic frameworks based hybrid materials as an excellent sorbent in solid-phase extraction. (c) 2014 Elsevier B.V. All rights reserved.
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