首页|Unraveling the isomerization and extraction characteristics of ester-form astaxanthin originated from Haematococcus lacustris in supercritical CO 2 for practical applications of Z -isomer-rich astaxanthin production
Unraveling the isomerization and extraction characteristics of ester-form astaxanthin originated from Haematococcus lacustris in supercritical CO 2 for practical applications of Z -isomer-rich astaxanthin production
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Elsevier
In recent years, the superior bioavailability and biological activity of astaxanthin Z-isomers have become evident, with their application being highly anticipated. Currently, thermal treatment remains the most commonly used method for inducing Z-isomerization in astaxanthin. However, this approach often requires the use of toxic solvents and catalysts to achieve efficient thermal isomerization. Here, we developed environmentally friendly processes for Z-isomerization of ester-form astaxanthin originated from Haematococcus lacustris utilizing the supercritical CO2 (SC-CO2) extraction process. Astaxanthin esters with a high ratio of Z-isomers (similar to 60 %) were successfully prepared without using toxic chemicals through three strategies: Z-isomerization via (i) high-temperature extraction, (ii) heating the extracted liquid, and (iii) heating the raw material before extraction. Furthermore, this study revealed that high-temperature treatment (>140 degrees C) of astaxanthin esters in SC-CO2 enhances the production of the valuable 9Z-isomer while also demonstrating that the solubility of geometrical isomers of astaxanthin esters in SC-CO2 is almost identical.
NETL
NSTL
Elsevier
