超高压制备黑茶多糖铁的化学组成与结构特性

Chemical Composition and Structural Characteristics of Dark Tea Polysaccharide-iron Prepared by Ultra-high Pressure

以黑茶为原料提取多糖,对比研究传统加热法和常温超高压法制备黑茶多糖铁复合物的化学组成和结构特性差异。结果表明,超高压法制备的多糖铁复合物(DTPIC-HP)和加热法制备多糖铁复合物(DTPIC-HW)中铁含量分别为16.73%和12.77%;与黑茶多糖(DTP)相比,三者的单糖组成相同,但单糖比例发生不同变化,其中DTPIC-HP的中性糖与糖醛酸比例为2.15,显著小于DTPIC-HW的8.40。DTPIC-HP具有更好的化学组成和结构特性,潜在的应用潜力更佳。

Dark tea was used as the raw material for extracting polysaccharide.The chemical composition and structural characteristics of the polysaccharide-iron complexes prepared by traditional heating and ultra-high pressure were investigated.The results showed that the iron content of the polysaccharide-iron complex(DTPIC-HP)generated by ultra-high pressure and the DTPIC-HW prepared by the heating method was 16.73%and 12.77%,respectively.Compared with dark tea polysaccharide(DTP),the monosaccharide composition of the three samples was the same,but the monosaccharide proportion was different.The ratio of neutral sugar to uronic acid in the DTPIC-HP was 2.15,significantly lower than 8.40 in the DTPIC-HW.Therefore,the DTPIC-HP had a better chemical composition and structural characteristics and potential applications.