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<p>A rapid hydrophilic covalent organic frameworks coated steel substrate (HCOFCS) was developed for the simultaneous determination of 9 mycotoxins in ready-to-eat corn using ambient mass spectrometry (AMS). The HCOFCS platform efficiently combines solid-phase extraction with electrospray ionization mass spectrometry. The established HCOFCS-ESI–MS method was employed to detect a variety of mycotoxins in ready-to-eat corn, including aflatoxin B<sub>1</sub> (AFB<sub>1</sub>), aflatoxin B<sub>2</sub> (AFB<sub>2</sub>), aflatoxin G<sub>1</sub> (AFG<sub>1</sub>), aflatoxin G<sub>2</sub> (AFG<sub>2</sub>), Zearalenone (ZEN), Zearalanone (ZAN), Zearalenol (ZEL), Zearalanol (ZAL) and ochratoxin A (OTA). After the extraction process, HCOFCS was subjected to high voltage for ESI–MS, with a detection time of approximately 1&#xa0;min. The method demonstrated a coefficient of determination (<i>R</i><sup>2</sup>) exceeding 0.99 over a concentration range 0.1–100&#xa0;μg/L. Limits of detection (LODs) and limits of quantitation (LOQs) ranged from 0.01–0.12&#xa0;µg/kg to 0.1–0.7&#xa0;μg/kg, respectively. The results indicated that the developed HCOFCS-ESI–MS method enables rapid and sensitive detection of multiple mycotoxins in ready-to-eat corn samples. Recoveries for the mycotoxins ranged from 83.62% to 96.97%, with relative standard deviations (RSDs) below 11.53%. Moreover, HCOFCS exhibited excellent inter-day and intra-day RSDs ranges, and the&#xa0;material&#xa0;could be reused at least six times without significant loss of adsorption efficiency.</p> Graphical Abstract <p></p>

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Ion source component development for ambient mass spectrometry-based mycotoxin detection in ready-to-eat corn

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Hui-Chao Wang,
  • Xiu-Li Xu,
  • Xiu-Juan Wang,
  • Jie Lian,
  • Feng Zhang

摘要

A rapid hydrophilic covalent organic frameworks coated steel substrate (HCOFCS) was developed for the simultaneous determination of 9 mycotoxins in ready-to-eat corn using ambient mass spectrometry (AMS). The HCOFCS platform efficiently combines solid-phase extraction with electrospray ionization mass spectrometry. The established HCOFCS-ESI–MS method was employed to detect a variety of mycotoxins in ready-to-eat corn, including aflatoxin B1 (AFB1), aflatoxin B2 (AFB2), aflatoxin G1 (AFG1), aflatoxin G2 (AFG2), Zearalenone (ZEN), Zearalanone (ZAN), Zearalenol (ZEL), Zearalanol (ZAL) and ochratoxin A (OTA). After the extraction process, HCOFCS was subjected to high voltage for ESI–MS, with a detection time of approximately 1 min. The method demonstrated a coefficient of determination (R2) exceeding 0.99 over a concentration range 0.1–100 μg/L. Limits of detection (LODs) and limits of quantitation (LOQs) ranged from 0.01–0.12 µg/kg to 0.1–0.7 μg/kg, respectively. The results indicated that the developed HCOFCS-ESI–MS method enables rapid and sensitive detection of multiple mycotoxins in ready-to-eat corn samples. Recoveries for the mycotoxins ranged from 83.62% to 96.97%, with relative standard deviations (RSDs) below 11.53%. Moreover, HCOFCS exhibited excellent inter-day and intra-day RSDs ranges, and the material could be reused at least six times without significant loss of adsorption efficiency.

Graphical Abstract