Study on the Stability of Litchi Pericarp Anthocyanins
This study aimed to investigate the stability of litchi anthocyanins.'Nuomici'pericarp was collected and used as the experimental materials for lychee anthocyanins separation and purification,the main anthocyanins were identified by HPLC-MS combined technology,and the effects of temperatures,phenols,aldehydes,organic acids,metal ions and antioxidants on the stability of lychee anthocyanins were studied.The results showed that the main anthocyanin in'Nuomici'lychee pericarp was cyanidin-3-rutinoside,which was unstable at high temperatures,while beneficial for preservation at low temperatures.The gallic acid,vanillin,oxalic acid,3,5-dinitrosalicylic acid,and ferulic acid all presented synergistic effects as co-pigment on lychee anthocyanins,and the effects were stronger with increasing concentrations within a certain range.Furthermore,Al3+ions demonstrated significant color enhancement and stabilization properties for the anthocyanins.In contrast,the antioxidant 2,6-di-tert-butyl-4-methylphenol showed obvious color enhancement on lychee anthocyanins but negatively impacted the stability maintenance.The research results could provide theoretical basis for the post-harvest color control of lychee peri-carp.
万方数据
维普
