How to analyzed the Astaxanthin content in haematococcus pluvialis microcapsules powder?

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Chinaza Godswill Awuchi

There are two general methods for analyzing the astaxanthin content of a product: spectrophotometric analysis and high-performance liquid chromatography (HPLC) analysis. In both methods, astaxanthin is extracted from a product into a suitable solvent such as acetone or hexane.

https://www.nutritionaloutlook.com/analytical-methods-measuring-astaxanthin

Analysis and Identification of Astaxanthin and its Carotenoid ...

... an HPLC method for simultaneous analysis of astaxanthin and its carotenoid precursors from Xanthophyllomyces ...

https://www.researchgate.net/publication/45950201_Analysis_and_Identification_of_Astaxanthin_and_its_Carotenoid_Precursors_from_Xanthophyllomyces_dendrorhous_by_High-Performance_Liquid_Chromatography

Four Different Methods Comparison for Extraction of Astaxanthin from ...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3916103/