Characteristic of the Pigments Extracted by Alkali from Chestnut Shell

4th Annual International Workshop on Materials Science and Engineering

Chen, Sijia^1,2,3 ; Xu, Lingyi^1,2,3 ; Han, Mengmeng^1,2,3 ; Qi, Jinghua^1,2,3

Beijing Innovation Consortium of Swine Research System, Beijing

100102, China^1

College of Food Science and Engineering, Beijing Key Lab. of Detection and Contr. of Spoilage Organisms and Pesticide Residues in Agric. Prod., Beijing

102206, China^2

Food Chemistry Teaching Team, Beijing University of Agriculture, Beijing

102206, China^3

关键词: Absorbances;    Alkali solutions;    pH value;    Salt solution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012083/pdf
DOI  :  10.1088/1757-899X/381/1/012083

来源: IOP

【 摘 要 】

Sampled with the pigments extracted by alkali solution from chestnut shell, the characteristic was compared with caramel pigment. The spectrophotometer was used to measure the absorbance at different wavelengths. The chromaticness, red index and the stability of the pigments from the chestnut shell related. Compared with caramel pigments, lower chromacticness and higher red index of shell pigments were shown. Furthermore, the chromaticness and red index of samples were increased with the pH value. In addition, the stability of the pigments from chestnut shell was better when the pH value was between 3.5∼6.0. But its stability in salt solution was not as good as caramel pigments.