Abstract
A nanocomposite (designated as PAG) possessing amphiphilic properties was prepared by a single-step method from graphene oxide and phytic acid, in which phytic acid acts as both an inducer and cross-linking agent. The morphology and microstructure of PAG were characterized by nitrogen adsorption, scanning electron microscopy and transmission electron microscopy. The PAG possess a 3 dimensional network structure with interpenetrated nano- and micropores and represent a viable adsorbent for solid-phase extraction of carbamate pesticides prior to their quantitation by high performance liquid chromatography. Under optimum conditions, the calibration plot is linear in the 0.5 to 80 ng g−1 concentration range in case of apple samples, and in the 1.0 to 80 ng mL−1 range for juice samples. The respective limits of detection (for S/N = 3) are between 0.05 and 0.1 ng g−1, and between 0.2 and 0.3 ng mL−1. The PAG has a high adsorption capability, and in our preception it may become a useful adsorbent for the preconcentration of other organic pollutants.
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Acknowledgments
Financial supports from the National Natural Science Foundation of China (31471643, 31571925, 31671930), the Natural Science Foundation of Hebei Province (B2016204136, B2016204146, B2017204025), the Scientific and Technological Research Foundation of the Department of Education of Hebei Province (ZD2016085), the Natural Science Foundation of Agricultural University of Hebei (LG201607) are gratefully acknowledged.
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Wu, J., Liang, X., Hao, L. et al. Graphene oxide cross-linked with phytic acid: an efficient adsorbent for the extraction of carbamates. Microchim Acta 184, 3773–3779 (2017). https://doi.org/10.1007/s00604-017-2413-y
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DOI: https://doi.org/10.1007/s00604-017-2413-y