Changes in Storage Stability and Degradation Kinetics of Starch-based Lycopene Complexes
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Abstract:
The storage stability and degradation kinetics of amylose-lycopene complexes (ALC) were studied by evaluating various indicators, such as color attributes, antioxidant efficacy, and lycopene retention rate. ALCs demonstrated excellent color stability, exhibiting no significant color changes in the initial seven-day pre-storage period. After 28 days of storage under anoxic conditions at ambient temperature and being shielded from light, the complexes exhibited a 26.51% color degradation rate. Moreover, ALCs had a high lycopene retention rate of 65.84% and an effective scavenging capacity for DPPH radicals of 23.54%, both significantly surpassing the amylose-lycopene physical blend of the control group, which showed a retention rate of 11.37% and a scavenging rate of 4.97% (P<0.01). ALC lycopene degradation over the storage duration adhered to a second-order kinetic model, with a half-life (T1/2) of 57.99 days and a one-tenth life (T9/10) of 8.78 days, substantially outperforming that of the control group at 8.70 and 1.32 days, respectively. The results underscore the superior storage stability of ALCs, which effectively preserve the color, content, and antioxidative properties of lycopene, thus providing a theoretical groundwork for stabilizing functional components of plant-derived lycopene.
