Storage quality of amylose-lycopene complexes and the establishment of a shelf life prediction model.

Abstract

To study the changes in the storage quality of amylose-lycopene complexes (ALCs), the color, antioxidant activity, lycopene content, and configuration changes of ALCs during different storage periods were analyzed. A shelf life prediction model was established to reveal the stability changes of the complexes. The results showed that the cis-isomer percentage of lycopene in ALCs increased significantly from 11.82% to 13.76%. The lycopene isomers were in the order of 5-Z > All-E > 9-Z > 13-Z. Correlation analysis indicated that the content of lycopene was a key factor affecting the quality of ALCs. ALCs followed zero-order and first-order degradation kinetics at 5°C-25°C and 35°C-45°C, respectively. The degradation degree of lycopene was negatively correlated with temperature, with half-lives and one-tenth decay periods of 32.37 days and 6.48 days (5°C) significantly higher than 10.78 days and 1.63 days (45°C). The activation energy required for the reaction of ALCs was as high as 106.29 kJ/mol, indicating greater stability. On this basis, an ALCs shelf life prediction model was established, with a relative error of 0.06%-5.03% between the predicted and actual values. The results indicated that ALCs had good color, antioxidant activity, lycopene content, and configuration stability, and that higher temperatures had a greater impact on lycopene. The study provides theoretical reference for the quality safety of ALCs.