Detection of selected heavy metals and micronutrients in edible insect and their dependency on the feed using XRF spectrometry

Authors

  • Jiří­ Mlček Tomas Bata University in Zlin, Faculty of Technology, Department of Food Analysis and Chemistry, Vavreckova 275, 760 01 Zlin
  • Martin Adamek Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Microelectronics, Technická 3058/10, 616 00 Brno
  • Anna Adámková Tomas Bata University in Zlin, Faculty of Technology, Department of Food Analysis and Chemistry, Vavreckova 275, 760 01 Zlin
  • Marie Borkovcová Mendel University in Brno, Faculty of Agronomy, Department of Zoology, Fisheries, Hydrobiology and Agriculture, Zemědělská 1, 613 00 Brno
  • Martina Bednářová Mendel University in Brno, Department of Information Technology, Zemědělská 1, 613 00 Brno
  • Josef Skácel Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Microelectronics, Technická 3058/10, 616 00 Brno

DOI:

https://doi.org/10.5219/850

Keywords:

edible insect, mealworm, superworm, X-ray fluorescence spectrometry, heavy metal

Abstract

Edible insect can be a valuable source of nutrients, but also a potential source of heavy metals. Quick detection of over-limit heavy metals concentration could be a key to processing and quick distribution of edible insect products. The aim of this work was to evaluate the feed-dependent content of heavy metals in the mealworm and superworm using the X-ray fluorescence spectrometry as an easy, cheap and a timeless screening method for evaluating the content of heavy metals and microelements. Using a handheld analyser the content of Cd, Pb, Cu and Zn were detected. Both analysed species proved dependency of metal content on a feed. Detected level of Cu in mealworm was between 571 mg.kg-1 and 1768 mg.kg-1 and in superworm from 571 mg.kg-1 to 1768 mg.kg-1 based on the feed. The content of Zn was similar, between 725 mg.kg-1 and 1437 mg.kg-1 in mealworm and 555-1482 mg.kg-1 in superworm. The level of Pb was below the detection limit in all samples, thus from this point of view this food seems to be safe. On the contrary, the content of Cd in the dry matter samples was above the food limit - 147 mg.kg-1 to 230 mg.kg-1. From this point of view, the samples were evaluated as unsuitable for consuming.

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References

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Published

2017-12-12

How to Cite

Mlček, J. ., Adamek, M. ., Adámková, A. ., Borkovcová, M. ., Bednářová, M. ., & Skácel, J. . (2017). Detection of selected heavy metals and micronutrients in edible insect and their dependency on the feed using XRF spectrometry. Potravinarstvo Slovak Journal of Food Sciences, 11(1), 725–730. https://doi.org/10.5219/850

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