on extraction of red pigment and found that the amount of
pigment extracted increases with the polarity of the solvent. And
ethanol gave the highest amount of oleoresin with 82% of capsaicinoids
and 74% of carotenoids. Enzyme-assistant extraction
(EAE) was also investigated for selective extraction of capsaicinoids
and carotenoids with different concentration of
aqueous ethanol , but the oleoresin
obtained was actually a mixture of capsaicinoids and red
pigment. Supercritical carbon dioxide extraction (SCDE) was reported
with a high yield of carotenoids without any remain of
organic solvent . However, SCDE is so expensive that it is not realistic
in industrial production of pepper colorants. And more importantly,
dry red peppers (DRPs) as materials were still used by the
above-mentioned methods.