Paprika extraction conditions

In this case both density and temperature were varied to investigate qualitatively the conditions at which the various compounds would be extracted from the paprika. Table II indicates the extraction conditions used for the paprika sample. 

Tumbas Saponjac, V., Cetojevic-Simin, D., Cetkovic, G., Canadanovic-Brunet, J., Djilas, S., Mandic, A., Tepic, A. (2014) Effect of extraction conditions of paprika oleoresins on their free radical scavenging and anticancer activity. Central European Journal of Chemistry, 12 (3), 377-385. 

Paprika can be extracted to recover carotenoids, not only with CO2 but also with other gases. For example, by using ethane or ethylene, better results were obtained for the yield, extraction time, and quality of product. The solubilities of carotenoids are better in these gases, which is why the consumption of solvent and the extraction time were reduced. Practically water-free dye-concentrate was recovered by supercritical fluid ethane (under the conditions extraction 250 bar, 45°C separation 46 bar, 45 °C). The separation of pungent substances (capsaicinoids, free fatty acids) from the pigments can be carried out effectively in a continuous, counter-current extraction column with a large number of theoretical plates. 

Fig. 3 Thin-layer chromatograms and visible absorption spectra of hydrolyzed paprika colors extracted from commercial foods under TLC/scanning densitometric conditions. (A) Hydrolyzed paprika color standard. (B) Hydrolyzed extract of rice-cracker. (C) Capsanthin. Plate RP-18 (E. Merck). Solvent system acetonitrile-acetone-n-hexane (11 7 2). Other conditions see Fig. 1.

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