Potential use of new Colombian sources of betalains. Colorimetric study of red prickly pear (Opuntia dillenii) extracts under different technological conditions

Cejudo-Bastante, Maria Jesús Y Hurtado, Nelson Y Heredia, Francisco (2015) Potential use of new Colombian sources of betalains. Colorimetric study of red prickly pear (Opuntia dillenii) extracts under different technological conditions. Food Research International, 71. pp. 91-99. ISSN 0963-9969

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Resumen

A new source of betalains to be used as natural colorant (Opuntia dillenii) has been studied. The stability of O. dillenii extracts in different pHs and temperatures over time has been scrutinized. Our attention was focused on differential tristimulus colorimetry and betalain content related to the color, not previously conducted in conjunction in that raw material. On the basis of the results, cold storage conditions (4 °C) were optimal to maintain as possible the initial red color (hab), lightness (L*) and betalain content of the O. dillenii extracts, regardless of pH. Highly-acidic extracts (pH 4) manifested a significantly (p < 0.05) lower colorant intensity (C*ab) and betalain concentration (around 25% and 35%, respectively), with a clearer tendency toward yellowish tonalities (values of hab from 45° to 90°) over time. Furthermore, visually perceptible color changes (ΔE*ab > 3) were induced among very acid (pH 4) and low-acidic (pH 5 and 6) extracts at each temperature.

Tipo de Elemento: Artículo
Palabras Clave: Opuntia dillenii; Differential tristimulus colorimetry; Betalains; Stability
Asunto: Q Ciencias > QD Chemistry
Division: Facultad de Ciencias Exactas y Naturales > Programa de Química > Productividad
Depósito de Usuario: PhD NELSON HUMBERTO HURTADO GUTIERREZ
Fecha Deposito: 30 Jan 2017 22:40
Ultima Modificación: 30 Jan 2017 22:40
URI: http://sired.udenar.edu.co/id/eprint/3594

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