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Thermal degradation kinetics of anthocyanin and visual colour of plum puree

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Abstract

Thermal degradation kinetics of anthocyanin and visual colour (tristimulus L, a and b values) of plum puree were studied at selected temperatures (50–90 °C) for a residence time of 20 min. Results indicated that the thermal degradation of anthocyanin, tristimulus colour a value (representing redness) and L×a×b value (representing total colour) followed first-order reaction kinetics. The activation energy values for anthocyanin, red colour and total colour were 37.48, 25.86 and 30.68 kJ/mol respectively. Higher activation energy signified higher thermal sensitivity of anthocyanin during heat processing of plum puree. A linear relationship described well the variation of total visual colour (L×a×b) with anthocyanin content of plum puree during thermal processing.

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Ahmed, J., Shivhare, U.S. & Raghavan, G.S.V. Thermal degradation kinetics of anthocyanin and visual colour of plum puree. Eur Food Res Technol 218, 525–528 (2004). https://doi.org/10.1007/s00217-004-0906-5

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  • DOI: https://doi.org/10.1007/s00217-004-0906-5

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