Extraction of Peel Pigments of Hylocereus undatus ‘Hong Xian Mi'
Pitaya pigment is a natural pigment with healthy function.In this paper,pitaya peel powder was pretreated by water extraction.The results of single-factor and orthogonal experiments showed that the degree of the factors which significantly influenced the yield of pitaya pigment was in order of extraction temperature,extraction solvent concentration,pH,extraction time.The optimal parameters for this method were as follows:powder was extracted by ultrasonic density of 40% at 30 ℃ for 45 min.