Objective: to study the influence of Vc on purple and red syrup pigments of mulberry fruit red pigment,mulberry juice,plum (San Hua Prun) juice,dragon fruit juice and flos hibisci juice.

• 目的:研究外源维生素C对桑椹红色素、桑椹原汁、三华李原汁、火龙果原汁、玫瑰茄花萼提取液等5种紫红色果汁色素的影响。