Journal
TALANTA
Volume 132, Issue -, Pages 713-718Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.10.038
Keywords
Metal-organic framework (MOFs); Benzophenone; 2,4-Dihydroxybenzophenone; 2-Hydroxy-4-methoxy-benzophenone; Dispersive solid-phase extraction (DSPE); Toner samples
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Funding
- Natural Science Fund for Creative Research Groups of Hubei Province of China [2011CDA111]
- Education Commission of Hubei Province of China [T201101, D20120106]
- National Nature Science Foundation of China [20975030, 20835004, 21003034]
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Metal-organic frameworks (MOFs) have been paid widespread attention in the field of adsorption and separation materials due to its porosity, large specific surface area, unsaturated metal-ligand sites and structural diversity. In this study, the green powder MIL-101 was synthesized and used for the extraction of benzophenone, 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxy-benzophenone from toner samples for the first time. The synthesized MIL-101 was characterized by X-ray diffraction, scanning electron microscopy, thermogravimetry and nitrogen adsorption porosimetry. The MIL-101 was applied as the dispersive solid phase extraction (DSPE) adsorbent for the extraction and preconcentration of benzophenone, 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxy-benzophenone from toner samples. The extraction conditions were investigated. Under the optimized conditions, a DSPE-HPLC method for the determination of benzophenone, 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxy-benzophenone was developed. The method yielded a linear calibration curve in the concentration ranges from 4.0 to 3500 mu g L-1 for the three analytes in toner samples with regression coefficients (r(2)) of 0.9992, 0.9999 and 0.9990, respectively. Limits of detection were 1.2, 1.2 and 0.9 mu g L-1, respectively. Both the intra-day and inter-day precisions (RSDs) were <10%. (C) 2014 Elsevier B.V. All rights reserved.
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