Purple sweet potato colorant is a natural anthocyanin pigment derived from purple sweet potato storage roots.
紫色甘薯色素是从紫色甘薯块根中浸提出来的一种天然食用花青素类色素。
The pigment of purple sweet potato(PPSP)is water-soluble natural pigment.
紫心番薯色素（PPSP）为水溶性天然色素。
The functional ingredients of pigment, soluble dietary fiber (SDF) and glycoprotein from sweet potato have been studied in this paper.
以红心萝卜为原料提取了红心萝卜紫色素，并对其理化性质和稳定性进行了研究。
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