Correlation Analysis of Curcuminoids and Color Index L , a and b of Curcumae Longae Rhizoma Powder

• Published in: Zhong yao cai Vol. 39; no. 6; p. 1247
• Main Authors: Yin, Li-li, Xia, Qin, Cai, Xiao-yang, Li, Min
• Format: Journal Article
• Language: Chinese
• Published: China 01.06.2016
• Subjects: Color; Colorimetry; Curcuma; Curcumin - analogs & derivatives; Diarylheptanoids; Powders; Rhizome
• ISSN: 1001-4454

To study the relationship between the component content of curcuminoids in Curcumae Longae Rhizoma and powder color indeces L*, a* and b* those were measured by chromaticity instrument, in order to provide scientific basis for quality assessment of Curcuma longa medicinal materials. Detect the content of curcumin,demethoxycurcumin,bisdemethoxycurcumin,then detect the content of curcuminoids by the Chinese Pharmacopoeia method. Measure the color indeces L*, a* and b* of Curcumae Longae Rhizoma powder by colorimeter. Finally, the relationship between the content and the color was analyzed by using the Grey Relational Analysis, Pearson correlation coefficient and regression analysis. There was positive correlation between the content of curcuminoids and a*. But there was no definitely relation between the content of curcuminoids and b* or L*. The content of curcuminoids is closely related with the degree of the color red, the higher the content, the red is deeper. a* could be recognized as an important basis of