Facile preparation of nano-g-C3N4/UiO-66-NH2 composite as sorbent for high-efficient extraction and preconcentration of food colorants prior to HPLC analysis

Xiaowan Zhang, Yixin Yang, Peige Qin, Lizhen Han, Wenli Zhu, Shaofeng Duan, Minghua Lu*, Zongwei Cai

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

36 Citations (Scopus)

Abstract

In this work, the nano-g-C3N4/UiO-66-NH2 composite was prepared by one-step solvothermal method. The as-prepared composite was characterized by scanning electron microscopy, Brunner-Emmet-Teller measurement, energy dispersive spectrometer, X-ray diffraction, and Fourier transform infrared spectroscopy. By using nano-g-C3N4/UiO-66-NH2 composite as sorbent, a dispersive solid-phase extraction coupled with high-performance liquid chromatography was developed to sensitive analysis of food colorants including tartrazine, amaranth, carmine, sunset yellow, allura red and bright blue. The experiment parameters including the amount of sorbent, adsorption time, the pH of adsorption solution, desorption time, desorption solvent, the pH of desorption solution as well as the proportion between desorption solvent and buffer solvent were investigated. Under the optimized conditions, the limits of detection (S/N = 3) and limits of quantitation (S/N = 10) were determined in the ranges of 0.08–0.8 and 0.2–2.0 ng/mL, respectively. With the developed sample pretreatment method, carmine and brilliant blue were determined from blueberry juice by HPLC-DAD. The contents were calculated as 1.53 µg/mL and 0.17 µg/mL, respectively.

Original languageEnglish
Pages (from-to)903-906
Number of pages4
JournalChinese Chemical Letters
Volume33
Issue number2
Early online date8 Jul 2021
DOIs
Publication statusPublished - Feb 2022

Scopus Subject Areas

  • Chemistry(all)

User-Defined Keywords

  • Dispersive solid-phase extraction
  • Food additives
  • Food colorants
  • High-performance liquid chromatography
  • Metal-organic frameworks
  • Nano-g-CN/UiO-66-NH composite
  • Sample pretreatment

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