Application of tristimulus colorimetry to evaluate colour changes during the ripening of Colombian guava (Psidium guajava L.) varieties with different carotenoid pattern |
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Authors: | Ivonne Alejandra González Coralia Osorio Antonio Jesús Meléndez‐Martínez Maria Lourdes González‐Miret Francisco José Heredia |
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Affiliation: | 1. Departamento de Química, Universidad Nacional de Colombia, AA 14490, Bogotá, Colombia;2. Laboratory of Food Colour and Quality, Department of Nutrition & Food Science. Facultad de Farmacia. Universidad de Sevilla, 41012‐Sevilla, Spain |
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Abstract: | The pigment composition of three Colombian guava varieties, Regional roja, Regional blanca, and Palmira ICA‐1, in unripe, turning and full ripe maturity stages was studied. Lycopene was identified as the major carotenoid of Regional roja and Palmira ICA‐1 (18.25 and 28.07 mg kg?1 fruit, respectively in full ripe fruits) although a small amount of lutein was also found in the two varieties. β‐Carotene was only found in Palmira ICA‐1, whilst no detectable levels of carotenoids were found in the white‐fleshed guava (Regional blanca). A good correlation between the total carotenoid content and the colour parameters of guava peel was found, such that the Regional roja and Regional blanca varieties could be discerned by colour coordinates. The most remarkable differences were found when comparing the pulp colour. |
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Keywords: | Carotenoids colour changes guava Psidium guajava L. tristimulus colorimetry |
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