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. Author manuscript; available in PMC: 2011 Dec 23.
Published in final edited form as: J Phys Chem B. 2010 Nov 29;114(50):16968–16977. doi: 10.1021/jp109039v

Figure 2.

Figure 2

ESI MS spectrum of astaxanthin in the presence of Ca(ClO4)2 in acetonitrile. The main peaks correspond to m/z = 318.2 [Ast+Ca]2+ and m/z = 597.4 [Ast+H]+. The complex was first prepared with carotenoid concentration of 0.1 mM with excess of the salt, and then was dissolved by a factor of 10 to obtain a good signal of the spectrum.