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Inquiry: Would it be possible to know the purity of the product?
Asked on Jun 23 2017
Purity Color value:100
Capsanthin is a dark red oil. The material is measured in color value, which is an absorbance test to determine the quantity of product present. Because the product is an oil, traditional analysis methods such as HPLC do not work.
The concentration of this product is given in 'Color Value' rather than in molarity. The extractable color of a given lot is evaluated and that lot is then classified into a color grade. These standardized color grades are set by the ASTA- American Spice Trade Association. Here is a link to the website which explains the process:
This is a very interesting chemical that has some unique properties but these properties also make it very difficult to test by other ordinary assays such as HPLC. The fact that it is a solution of capsanthin in oil also makes testing by NMR very difficult; you won't know the concentration of capsanthin in the NMR solution, so it may be too dilute to observe a strong signal, and there are erroneous peaks produced by the oil. Therefore, this product is analyzed for the ASTA color value.
Answered on Jun 23 2017