Facile synthesis of amine-functional reduced graphene oxides as modified quick, easy, cheap, effective, rugged and safe adsorbent for multi-pesticide residues analysis of tea

文献类型: 外文期刊

第一作者: Ma, Guicen

作者: Ma, Guicen;Zhang, Minglu;Zhu, Li;Chen, Hongping;Liu, Xin;Lu, Chengyin;Ma, Guicen;Zhang, Minglu;Zhu, Li;Chen, Hongping;Liu, Xin;Lu, Chengyin;Ma, Guicen;Zhang, Minglu;Zhu, Li;Chen, Hongping;Liu, Xin;Lu, Chengyin

作者机构:

关键词: Amine-functional reduced graphene oxide;QuEChERS;Multi-pesticide residues;Tea;UPLC-MS/MS;GC-MS/MS

期刊名称:JOURNAL OF CHROMATOGRAPHY A ( 影响因子:4.759; 五年影响因子:4.302 )

ISSN: 0021-9673

年卷期: 2018 年 1531 卷

页码:

收录情况: SCI

摘要: Amine-functional reduced graphene oxide (amine-rGO) with different carbon chain length amino groups were successfully synthesized. The graphene oxides (GO) reduction as well as amino grafting were achieved simultaneously in one step via a facile solvothermal synthetic strategy. The obtained materials were characterized by X-ray diffraction, Raman spectroscopy, Fourier-transform infrared spectrometry and X-ray photoelectron spectroscopy to confirm the modification of GO with different amino groups. The adsorption performance of catechins and caffeine from tea acetonitrile extracts on different amine functional rGO samples were evaluated. It was found that tributylamine-functional rGO (tri-BuA-rGO) exhibited the highest adsorption ability for catechins and caffeine compared to GO and other amino group functional rGO samples. It was worth to note that the adsorption capacity of catechins on tri-BuA-rGO was 11 times higher than that of GO (203.7 mg g(-1) vs 18.7 mg g(-1)). Electrostatic interaction, pi-pi interaction and surface hydrophilic-hydrophobic properties of tri-BuA-rGO played important roles in the adsorption of catechins as well as caffeine. The gravimetric analysis confirmed that the tri-BuA-rGO achieved the highest efficient cleanup preformance compared with traditional dispersive solid phase extraction (dSPE) adsorbents like primary-secondary amine (PSA), graphitized carbon black (GCB) or C18. A multi pesticides analysis method based on tri-BuA-rGO is validated on 33 representative pesticides in tea using gas chromatography coupled to tandem mass spectrometry or high-performance liquid chromatography coupled with tandem mass spectrometry. The analysis method gave a high coefficient of determination (r(2) > 0.99) for each pesticide and satisfactory recoveries in a range of 72.1-120.5%. Our study demonstrated that amine functional rGO as a new type of QuEChERS adsorbent is expected to be widely applied for analysis of pesticides at trace levels. (C) 2017 Elsevier B.V. All rights reserved.

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