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<p>A method for Hg determination in edible oils based on reversed-phase dispersive liquid–liquid microextraction and cold vapor generation coupled to inductively coupled plasma mass spectrometry was developed. The&#xa0;operational parameters were 5&#xa0;g of edible oil, 0.5&#xa0;mL of <i>n</i>-propanol, and 0.5&#xa0;mL of 6&#xa0;mol L<sup>−1</sup> HCl used as dispersant and extractant solvents, respectively, heating (10&#xa0;min at 80&#xa0;°C), stirring (60&#xa0;s), and centrifugation (5&#xa0;min). No statistical difference (<i>t</i>-test, 95%&#xa0;confidence level) was observed for the accuracy assessment using a certified reference material. Moreover, recovery experiments were performed by addition of 0.5, 1.0, and 1.5&#xa0;µg&#xa0;g<sup>−1</sup> of Hg, and recoveries were close to 100%. A low limit of quantification (0.35&#xa0;ng&#xa0;g<sup>−1</sup>) and relative standard deviation (7%) were obtained. Finally, the proposed method presented several&#xa0;advantages, including&#xa0;high throughput, easy-to-use instrumentation for sample preparation, high pre-concentration factor, low consumption of reagents, and low waste generation.</p> Graphical Abstract <p></p>

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Mercury Determination in Edible Oils—A Combination of Reversed-Phase Dispersive Liquid–Liquid Microextraction and CVG-ICP-MS

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • Cristian R. Andriolli,
  • Alessandra S. Henn,
  • Erico M. M. Flores,
  • Eder L. M. Flores,
  • Rochele S. Picoloto

摘要

A method for Hg determination in edible oils based on reversed-phase dispersive liquid–liquid microextraction and cold vapor generation coupled to inductively coupled plasma mass spectrometry was developed. The operational parameters were 5 g of edible oil, 0.5 mL of n-propanol, and 0.5 mL of 6 mol L−1 HCl used as dispersant and extractant solvents, respectively, heating (10 min at 80 °C), stirring (60 s), and centrifugation (5 min). No statistical difference (t-test, 95% confidence level) was observed for the accuracy assessment using a certified reference material. Moreover, recovery experiments were performed by addition of 0.5, 1.0, and 1.5 µg g−1 of Hg, and recoveries were close to 100%. A low limit of quantification (0.35 ng g−1) and relative standard deviation (7%) were obtained. Finally, the proposed method presented several advantages, including high throughput, easy-to-use instrumentation for sample preparation, high pre-concentration factor, low consumption of reagents, and low waste generation.

Graphical Abstract