Solubility of Capsaicin and Β-Carotene in Supercritical Carbon Dioxide and in Halocarbons
B N. Hansen, Allan H. Harvey, J P. Coelho, M F. Palavra, Thomas J. Bruno
We measured the solubilities of Β-carotene and capsaicin in supercritical carbon dioxide, and also in difluoromethane (R-32) and 1,1,1,2-tetrafluoroethane (R-134a) in the liquid phase at temperatures near and somewhat below their critical points. Β-carotene solubility was also measured in 1,1,1-trifluoroethane (R-143a). The temperatures of the measurements ranged from 35 C to 55 C for capsaicin (up to 85 C in R-32) and from 40 C to 70 C for Β-carotene. The solubilities were determined using an HPLC system for capsaicin and a static high pressure cell for Β-carotene, and the amounts of products extracted were measured spectroscopically. At similar temperatures and densities, the solubility of capsaicin in the alternative refrigerants was higher than that in carbon dioxide; there was not such a clear trend for Β-cartene. Where the data covered a sufficient density range, they (along with literature data for the solutes in carbon dioxide) where analyzed according to the semiempirical density-based model of Mendez-Santiago and Teja.
, Harvey, A.
, Coelho, J.
, Palavra, M.
and Bruno, T.
Solubility of Capsaicin and Β-Carotene in Supercritical Carbon Dioxide and in Halocarbons, Journal of Chemical and Engineering Data, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=831766
(Accessed September 21, 2023)