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http://dx.doi.org/10.12925/jkocs.2018.35.1.292

Studies on the Stability of Natural Pigment Extracted from Ascidian shell  

Park, Sin-Ho (Mokwon University, College of Sciences & Technology, Division of Biomedicinal & Cosmetics)
Yang, Jae-Chan (Mokwon University, College of Sciences & Technology, Division of Biomedicinal & Cosmetics)
Publication Information
Journal of the Korean Applied Science and Technology / v.35, no.1, 2018 , pp. 292-298 More about this Journal
Abstract
In this study, Ascidian shell pigment was extracted, first using a 100.0 % ethanol solvent, proceeding with the dilution of it with DMSO (Dimethyl sulfoxide). The extracted pigment was evaluated to verify the stability. The absorbance of light have been evaluated according to pH levels and using the color-difference meter. As a result, it could be seen that absorbance and chromaticity ${\pm}a$ values were most stable at a pH level of 7.0 By keeping the sample at a pH level of 3.0, it could be observed that the absorbance and the chromaticity ${\pm}a$ values were decreased. Based on this observation, it can be deduced that the discoloration of the pigment can be prevented if kept at a neutral pH level. When antioxidants were added, the absorbance of the pigment increased, and the best effects could be seen in the ${\alpha}-tocopherol$ and glutathione samples.
Keywords
stability; Ascidian shell; Natural color; antioxidants; carotenoid;
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