| Physical and Chemical Properties | Chemical properties red oily liquid, no spicy or peculiar smell. The maximum absorption wavelength in acetone is 449nm. Soluble in vegetable oil, insoluble in water. The color tone is stable in the range of pH 3~12, and the light resistance and heat resistance are good. The oral LD50 of mice is> 17g/kg, which is highly safe because it is extracted from red pepper. |
| Use | Use as food colorants, China's provisions can be used for candy, cold drinks, biscuits, cooked meat products, artificial crab meat, sauce and cakes on the color, according to the production needs of the appropriate amount of use. Edible orange pigment. |
production method
1. it is obtained by extracting the dried peel of solanaceae pepper with n-hexane as solvent.
2. generally, chili oleoresin is extracted from chili powder first, then capsaicin, a spicy substance, is removed, capsaicin is refined to obtain capsicum pigment, and capsicum orange pigment can be obtained by separating capsicum pigment.
Extraction of Capsicum oleoresin
reflux extraction with n-hexane twice as much as chili powder at 50~55 ℃ for 1h. after suction filtration, the filter residue is repeatedly reflux extraction with hexane twice. the filtrate is distilled to remove the solvent to obtain chili oleoresin. 5kg of chili powder can also be soaked in 20kg of acetone for 3 days at room temperature, and solvent and O.5 fu chili oleoresin will flow out after filtration.
lipase-solvent extraction of capsicum pigment
add 200g of capsicum oleoresin and lipase MY with 100,000 color value in 200g of water, then add 200g of n-hexane, stir at room temperature for 4h, add 600g of n-hexane after reaction, dissolve, stand for stratification, take the upper layer (hexane layer), and wash with 600g of 95% methanol. The methanol layer containing fatty acid, tannin and odor-like substances is separated, and the hexane layer is treated with 80% methanol twice. After distillation, 60g of thick pigment with 300,000 color value and no peculiar smell is obtained.
Separation of Capsicum Pigment
P> Capsicum pigment can be separated into black, red, yellow and orange by column chromatography. In a glass column containing 250g of silica gel, 48g of the above thick pigment was added, and then 800mI was used. Hexane elution, 2.5g of melanin can be obtained by distilling hexane in eluent, then 1.4L5% isopropyl ether-95% hexane elution, 15.3g of yellow pigment is obtained by distilling solvent in eluent, 1.7L of 25% isopropyl ether 75% hexane elution, and 14.4g of red pigment is obtained by distilling solvent in eluent. Finally, 1.7L acetone was eluted.