Shipin gongye ke-ji (Jan 2023)

Determination of Inorganic Arsenic in Mineral Water and Tea Beverages by Pipette-tip Solid Phase Extraction Combined with Hydride Generation-Atomic Fluorescence Spectroscopy

  • Dayu YANG,
  • Deyi ZHAO,
  • Rui HUANG,
  • Ting ZOU,
  • Xinxian DAI,
  • Si LI,
  • Zhiming YAN

DOI
https://doi.org/10.13386/j.issn1002-0306.2022030137
Journal volume & issue
Vol. 44, no. 1
pp. 292 – 298

Abstract

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Objective: Establishing a simple and convenient method for the analysis of inorganic arsenic in mineral water and tea beverages. Methods: Amino-functioned polyacrylonitrile nanofibers (NH2-PAN nanofibers) was fabricated and used as adsorbent for pipette-tip solid-phase extraction (PT-SPE) of inorganic arsenic in mineral water and tea beverages followed by hydride generation-atomic fluorescence spectrometry (HG-AFS) analysis. Results: The optimal extraction conditions of pipette-tip solid phase extraction were that the pH of the sample solution was 8, the adsorbent was 12 mg NH2-PAN nanofibers, and the elution solution was 5 mL HCl with a concentration of 0.01 mol/L. Under the optimum conditions, the established method showed good linearity in the range of 0.0235~60 μg/L with correlation coefficient greater than 0.994 and a precision of less than 6%. The spiked recoveries of inorganic arsenic were above 85% for both mineral water and tea beverages at two levels of spiked concentrations. Conclusion: The established NH2-PAN nanofibers based PT-SPE/HG-AFS method is simple, accurate and expected to provide a prospective solution for the detection of inorganic arsenic.

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