Thermal and light degradation kinetics of anthocyanin extracts from mangosteen peel (Garcinia mangostana L.)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)P>The stability and half-life time of anthocyanin extracts from mangosteen peel were studied under controlled oxygen supply, undergoing the influence of light source (fluorescent, incandescent, infrared and ultraviolet) and storage temperature (5, 28, 40 and 50 degrees C). The kinetic parameters for anthocyanin degradation, under different illumination conditions fit the first-order reaction model, and the exposition under fluorescent light resulted in a higher half-life time (597 h), followed by incandescent (306 h), ultraviolet (177 h) and infrared (100 h). The kinetic behaviour for the storage in different temperatures also fit the first order, and at 5 degrees C the highest half-life time (4006 h) was found, followed by 28 degrees C (370 h), 40 degrees C (125 h) and 50 degrees C (93 h). The activation energy was 14.7 Kcal.mol-1, and Q(10) values showed that at 5 degrees C the anthocyanin extracts were more sensitive to storage temperature changes compared to the other tested temperatures.45919021908Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq