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Simple and Sensitive Determination of Aromatic Acids in Coconut Water by g-C3N4@SiO2 Based Solid-phase Extraction and HPLC-UV Analysis

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Abstract

In this study, graphitic carbon nitride deposited silica(g-C3N4@SiO2) was prepared by simple pyrolysis of melamine on silica and then used as a solid-phase extraction(SPE) sorbent for the extraction of four representative aromatic acids including benzoic acid(BA), salicylic acid(SA), indolyl-3-butyricacid(IBA) and naphthalene acetic acid(NAA) in coconut water(CW) samples. g-C3N4@SiO2 exhibited an excellent adsorption capacity for the four aromatic acids, which are in the concentration range of 500–558.8 μg/g. The four aromatic acids could be directly captured by g-C3N4@SiO2 from CW samples within 5 min. Thus, a rapid, simple and effective method for the analysis of four aromatic acids in CW samples was developed by coupling g-C3N4@SiO2-based SPE with high performance liquid chromatography-ultraviolet(HPLC-UV) detection. The linearity of the developed method was in the range of 20–1000 ng/mL and its limit of detection was in the range of 1.9–5.7 ng/mL, which were significantly lower than those of the reported similar methods. The intraday and interday precisions(based on the relative standard deviation, n=3) of the four aromatic acids were under 9.5% and 10.4%, respectively. The developed method was applied to determining the four aromatic acids in real CW samples and the spiked recoveries varied from 81.1% to 121.8%.

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Authors and Affiliations

  1. Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China

    Gezhen Qiangba, Qiongwei Yu & Yuqi Feng

  2. Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan, 430075, P. R. China

    Gangtian Zhu

Authors
  1. Gezhen Qiangba
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  2. Gangtian Zhu
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  3. Qiongwei Yu
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  4. Yuqi Feng
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Corresponding authors

Correspondence to Qiongwei Yu or Yuqi Feng.

Additional information

Supported by the National Natural Science Foundation of China(Nos.31671929, 21475098) and the Fundamental Research Funds for the Central Universities of China.

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Qiangba, G., Zhu, G., Yu, Q. et al. Simple and Sensitive Determination of Aromatic Acids in Coconut Water by g-C3N4@SiO2 Based Solid-phase Extraction and HPLC-UV Analysis. Chem. Res. Chin. Univ. 34, 528–535 (2018). https://doi.org/10.1007/s40242-018-8041-1

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  • DOI: https://doi.org/10.1007/s40242-018-8041-1

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