Analysis and evaluation of main nutritional ingredients in residual of lotus root from different areas

To make comprehensive utilization of residual of lotus root,saccharides,amino acids,nucleosides and proteins in residual of lotus root and eight origins,were analyzed and evaluated. The results showed that there were plenty of nutritional ingredients in the residual of lotus root,including fructose(0.777%~2.982%),glucose(0.652%~1.798%),sucrose(2.473%~14.776%),raffinose(0.487%~1.602%),lupeose(0.355%~1.924%),total polysaccharide(5.110%~10.110%);adenosine(0~0.103 μg·g^-1),inosine(0~0.030 μg·g^-1)and protein(1.012%~4.122%). Moreover,20 kinds of amino acids were determined,including 9 essential amino acids. Nutritional ingredients in in residual of lotus root from different areas were evaluated by principal component analysis. The comprehensive score of samples from Suqian of Jiangsu was higher than the other origins. Results also indicated the nodes of lotus rhizome from Jinhua of Zhejiang and Anqing of Anhui were better than the lotus rhizome,which could be further developed for medicine or health care products to enhancing resource value.