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Supramolecular deep eutectic solvent: a powerful tool for pre-concentration of trace metals in edible oil

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Abstract

The utilization of supramolecular deep eutectic solvent eddy-assisted liquid–liquid microextraction utilizing 2-hydroxypropyl β-cyclodextrin (SUPRADES) has been identified as a successful method for pre-enriching Cu, Zn, and Mn in vegetable oil samples. Determination of each element was conducted by inductively coupled plasma optical emission spectrometry (ICP-OES) after digestion of metal-enriched phases. Various parameters were examined, including the composition of SUPRADES species [2HP-β-CD: DL-lactic acid], a cyclodextrin mass ratio of 20 wt%, a water bath temperature of 75 °C, an extractor volume of 800 μL, a dispersant volume of 50 μL, and an eddy current time of 5 min. Optimal conditions resulted in extraction rates of 99.6% for Cu, 105.2% for Zn, and 101.5% for Mn. The method exhibits a broad linear range spanning from 10 to 20,000 μg L−1, with determination coefficients exceeding 0.99 for all analytes. Enrichment coefficients of 24, 21, and 35 were observed. Limits of detection ranged from 0.89 to 1.30 μg L−1, while limits of quantification ranged from 3.23 to 4.29 μg L−1. The unique structural characteristics of the method enable the successful determination of trace elements in a variety of edible vegetable oils.

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Acknowledgements

The authors also appreciate the facilities rendered by the National Coarse Cereals Engineering Research Center and Agricultural Products and Processed Products Supervision and Testing Center, Ministry of Agriculture, for the facilities rendered We thank Home for Researchers (www.home-for-researchers.com) for its linguistic assistance during the preparation of this manuscript.

Funding

This work was supported by the School Cultivation Subject (No.PTJH201905).

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Authors and Affiliations

  1. College of Food Science, Heilongjiang Bayi Agricultural University, No. 5, Xinfeng Road, Daqing, 163319, China

    Peng Sun, Chao Wang & Nan Li

  2. Agricultural Products and Processed Products Supervision and Testing Center, Ministry of Agriculture, Daqing, 163319, China

    Peng Sun, Shuo Li & Yuling Gao

  3. National Coarse Cereals Engineering Research Center, Daqing, 163319, China

    Peng Sun, Chao Wang, Shuo Li, Nan Li & Yuling Gao

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  1. Peng Sun
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Contributions

Chao Wang: Conceptualization, Methodology, Validation, Writing—Original Draft. Shuo Li: Data curation. Peng Sun: Supervision. Yvling Gao: Writing—Review and Editing. Zhao Yv: Software, Validation.

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Correspondence to Peng Sun.

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Sun, P., Wang, C., Li, S. et al. Supramolecular deep eutectic solvent: a powerful tool for pre-concentration of trace metals in edible oil. Anal Bioanal Chem (2024). https://doi.org/10.1007/s00216-024-05304-x

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