从黑稻秆中提取黑米色素

Extract Red Rice Red from the Black Rice Straw

在pH =2的条件下 ,用乙醇 -水作溶剂从黑稻秆中萃取黑米色素 .研究了萃取溶剂、温度、萃取时间对黑米色素的萃取效率的影响 ,并对萃取产物进行了表征 .实验结果表明 ,在温度为 70℃ ,用 6 0 %的乙醇水溶液萃取 6 0min的萃取效果最好 ,萃取率为 3 5 9% .这种萃取黑米色素的工艺简单 ,无毒害 ,无污染 .

The black(purpl) colour extracted from natural black rice by alcohol solution at pH=2.The pigment of black rice straw has been examined in relation to the extractant,temperature,time and the product were characterized.It was shown that the extraction process was practicable and the yield was 3 59% in the 60% alcohol solution,reaction temperature was 70℃ and reaction time was 60 min.