Czech J. Food Sci., 2024, 42(3):207-215 | DOI: 10.17221/164/2023-CJFS

Influence of calcium fortification on the stability of anthocyanins in strawberry pureeOriginal Paper

Eugene Okraku Asare ORCID..., Novel Kishor Bhujel ORCID..., Adam Tobolka ORCID..., Tereza ©korpilová ORCID..., Helena Èí¾ková ORCID..., Ale¹ Rajchl ORCID...
Department of Food Preservation, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czech Republic

Anthocyanins have received an increased attention not only because of its antioxidant activity; but because fortification of food products by minerals is important due to the lack of some minerals in population. The addition of these minerals can affect the sensorial and nutritional composition of food. The influence of calcium fortification on anthocyanins and colour changes in strawberry puree were assessed by accelerated storage test. The quantification of anthocyanins was performed by high-performance liquid chromatography with diode-array detection (HPLC-DAD) and colour changes were measured spectrophotometrically (CIE L* – lightness, a* – redness, b* – yellowness). The kinetical parameters (velocity constants and activation energies) were calculated. The activation energies of degradation of anthocyanins were calculated as pelargonidin-3-glucoside (26.24 ± 0.57, 21.18 ± 1.07, and 24.53 ± 1.33 kJ·mol–1), cyanidin-3-glucoside (16.10 ± 0.96, 11.61 ± 0.74, and 13.34 ± 1.72 kJ·mol–1), and pelargonidin-3-rutinoside (8.91 ± 0.17, 7.39 ± 0.98, and 8.23 ± 1.72 kJ·mol–1) of the control sample, calcium carbonate and calcium citrate respectively. The results showed that the addition of calcium salt had a statistically significant (P ≤ 0.05) effect on the degradation of anthocyanins.

Keywords: calcium carbonate; calcium citrate; degradation; pelargonidin-3-glucoside; pelargonidin-3-rutinoside; cyanidin-3-glucoside

Received: October 5, 2023; Revised: June 6, 2024; Accepted: June 7, 2024; Prepublished online: June 26, 2024; Published: June 27, 2024  Show citation

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Asare EO, Bhujel NK, Tobolka A, ©korpilová T, Èí¾ková H, Rajchl A. Influence of calcium fortification on the stability of anthocyanins in strawberry puree. Czech J. Food Sci. 2024;42(3):207-215. doi: 10.17221/164/2023-CJFS.
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