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Deep eutectic solvent-based ligandless ultrasound-assisted liquid-phase microextraction for extraction of cobalt ions from food samples prior to spectrophotometric determination

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Abstract

An innovative environmentally friendly deep eutectic solvent-based ligandless ultrasound-assisted liquid-phase microextraction was introduced for spectrophotometric determination of trace amount of cobalt. n-phenyliminodiacetic acid: choline chloride (2:1 mol ratio) as a novel DES was prepared for extraction of cobalt ions which is both as chelating agent and extraction solvent. The pivotal factors affecting the proposed method including pH, time, temperature, extraction solvent volume, ionic strength, and sample volume were investigated. At optimum conditions, limit of detection and limit of quantification of 5.23 µg L−1 and 17.67 µg L−1 were achieved respectively. The linear range of 20–200 µg L−1 and precision (relative standard deviation %) of 3.4 for 100 µg L−1 Co+2 solution were gained. The proposed method was successfully applied in water samples, tomato sauce, black and green tea, and dark chocolate with high recovery values (%) of 94–105.

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Research data have been provided in the manuscript.

Abbreviations

DES-LL-USA-LPME:

Deep eutectic solvent-based ligandless ultrasound-assisted liquid-phase microextraction

LOD:

Limit of detection

LOQ:

Limit of quantification

SPE:

Solid phase extraction

HBD:

Hydrogen bond donor

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Acknowledgments

The authors gratefully appreciate Shahrekord University and University of Jiroft for the valuable supporting of this research study.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Shahrekord University, P.O. Box 115, Shahrekord, Iran

    Akram Torabi & Abolfazl Semnani

  2. Department of Chemistry, Faculty of Science, University of Jiroft, P. O. Box 7867161167, Jiroft, Iran

    Mahboube Shirani & Ali Akbari

Authors
  1. Akram Torabi
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  2. Mahboube Shirani
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  3. Abolfazl Semnani
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  4. Ali Akbari
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Contributions

AT carried out the experimental analysis and data collection as Master student. MS and AS designed the project, handled writing the manuscript and data analysis. AA synthetized and prepared the DES.

Corresponding authors

Correspondence to Mahboube Shirani or Abolfazl Semnani.

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The authors declare that they have no competing interests.

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Torabi, A., Shirani, M., Semnani, A. et al. Deep eutectic solvent-based ligandless ultrasound-assisted liquid-phase microextraction for extraction of cobalt ions from food samples prior to spectrophotometric determination. J IRAN CHEM SOC 18, 893–902 (2021). https://doi.org/10.1007/s13738-020-02079-7

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  • DOI: https://doi.org/10.1007/s13738-020-02079-7

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