火龙果果皮色素是从火龙果果品加工副产物果皮中提取的天然色素,具有“天然、营养、多功能”等多重优点,故作为添加剂在食品加工业、化妆品制造业等中都具有很好的应用前景.本实验拟实现火龙果的综合利用,提高火龙果的附加值,拓展其应用范围,研究了从火龙果果皮中提取红色素的工艺条件.选用火龙果果皮为原料,对火龙果果皮内红色素采用溶剂浸提法进行提取,研究材料的储存方法、浸提液种类、液料比、浸提时间、浸提温度以及pH对色素提取的影响,确定最适的工艺条件:对火龙果果皮进行冷冻储存；浸提液为去离子水；液料比为5∶1；浸提时间30min;浸提温度50℃；浸提液pH6时,可以得到高产率、高色值、安全的火龙果果皮红色素.%Pitaya (Hylocereus undutusL) peel pigment, a natural pigment extracted from pitaya peel, is a by -product during the processing of pitaya. The pigment has multiple advantages such as natural, nutritional, muld -functional. It has a good application in food industry, cosmetics manufacturing and m any other fields as additives. This experiment discussed the comprehensive utilization, the additional value and potential application of the pigment. The extracting condition of red pigment from the pitaya peel was studied. Pitaya peel was used as raw materials and pigment was extracted by solvent extraction. The influence factors such as storage of raw material, the type of the extract solvents and its ratio, the extraction time and the temperature , the pH on yield of pigment were studied. The optimum technological conditions were; refrigerator storage of pitaya peel, deionized water extraction at ratio of 5:1, extraction 30 min, 50 ℃, pH 6.
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