可食雀梅藤果实色素的提取及理化性质研究

采用0.1% HCl - 70%乙醇(体积分数)水溶液从可食的雀梅藤果实中提取食用色素,并对该色素的理化性质和稳定性进行了研究.结果表明:色素得率为8.2%,色素易溶于水、甲醇、乙醇等极性溶剂,其颜色随pH值变化而变化,pH值≤3时,其最大吸收波长为530nm,有较好的耐热、耐光性,但耐碱、耐氧化还原性能差,葡萄糖、蔗糖、柠檬酸、食盐、苯甲酸、Mg~(2 +)、Zn~(2 +)、K +、Ca~(2 +)、Na +均使其色微减, Al~(3 +)、Fe~(3 +)、Cu~(2 +)使其变色;初步急性毒性实验中小白鼠无异常表现.

Study on Extraction and Properties of Edible Pigment from the Fruit of Sageretia thea(Osbeck) Johnst

The pigment was extracted from the edible fruit of Sageretia theezans Brongn by using 0.1% HCl - 70% EtOH(volume fraction)water solution, and its stability, physicochemical properties were studied. The results showed that the yield of the pigment was 8.2%. The pigment has good solublility in polar solvents such as water, methanol and ethanol, and its colour changes with pH value.When pH value≤3, its λ_max was 530nm, with considerable heat and light stabilities, but its alkaline resistance and redox resistance were poor. Its color can be slightly weakened by glucose, sucrose, citric acid, table salt, phenylformic acid, Mg~(2 +), Zn~(2 +), K +, Ca~(2 +), Na +, and the colour can be changed by Al~(3 +), Fe~(3 +), Cu~(2 +). The white mouse hadn't showed any unusual behaviour in the preliminary acute toxicity test.