Abstract
We describe the preparation of nanoporous carbon using a metal-organic framework (MOF) as a template and furfuryl alcohol as the source for carbon. The MOF consists of a zeolitic framework (ZIF-8) that was obtained from 2-methylimidazole and Zn(II) ions. ZIF-8 was soaked with furfuryl alcohol which then was carbonized at 900 °C. The resulting nanoporous carbon (MOF-C) exhibits a high specific surface area and a large pore volume. It was used as a dispersive solid-phase adsorbent for the preconcentration of the benzoylurea insecticides diflubenzuron, triflumuron, hexaflumuron and teflubenzuron from water and tangerine samples. Under optimized conditions, the methods exhibits excellent extraction performance. The insecticides can be quantified via HPLC with UV detection in the 0.5 to 100 ng mL−1 concentration range in case of spiked tap water, and in the 2.0 to 200 ng g−1 concentration range in case of tangerines. The limits of detection range from 0.10 to 0.23 ng mL−1 in case of water samples, and from 0.34 to 0.71 ng g−1 for tangerine sample (at an S/N ratio of 3). Mean recoveries range from 91.7 to 107.9 %, with relative standard deviations of <7.1 %. The results indicate that the method was efficient for the preconcentration of trace levels of benzoylurea insecticides from water and tangerine samples. Conceivably, this new adsorbent has a large potential with respect to the enrichment of other organic pollutants from various kinds of samples.
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Acknowledgments
Financial supports from the National Natural Science Foundation of China (No. 31171698, 31471643), the Innovation Research Program of the Department of Education of Hebei for Hebei Provincial Universities (LJRC009), the Scientific and Technological Research Foundation of Department of Education of Hebei Province (No. ZD20131033), and the Natural Science Foundations of Hebei (No. B2012204028) are gratefully acknowledged.
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Liu, X., Wang, C., Wang, Z. et al. Nanoporous carbon derived from a metal organic framework as a new kind of adsorbent for dispersive solid phase extraction of benzoylurea insecticides. Microchim Acta 182, 1903–1910 (2015). https://doi.org/10.1007/s00604-015-1530-8
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DOI: https://doi.org/10.1007/s00604-015-1530-8