Introduction
Black Sesame Black Pigment exists only in the seed coat. It is an alkali-soluble pigment, soluble in polar solvents such as water and alcohol, but insoluble in solvents such as ether and petroleum. Its molecular structure has multiple OH groups and a benzene ring, and it is an organic compound containing N atoms that are readily soluble in alkali. There are carbon-oxygen double bonds, aromatic biphenyl rings, four-substituted benzene rings, and hydroxyl groups. It belongs to a catechol-type black pigment. It is an excellent natural antioxidant resource, which has the functions of anti-oxidation, lowering blood fat, removing free radicals in the body, and beautifying.
Extraction process and method
Black sesame-defatting-soaking extraction-suction filtration-vacuum concentration-freeze drying_finished product. Currently, commonly used extraction methods mainly include alcohol extraction and ultrasonic-assisted extraction.
Alcohol extraction method:
50% ethanol solution, extraction temperature 65 ℃, time 60 min, solid-liquid ratio 1:50 (g/mL), the extraction time is greatly reduced.
Ultrasonic Assisted Extraction:
Distilled water was used as the extraction agent, and the ratio of solid to liquid was 1:20 (g/mL). The ultrasonic power was 80 W, the time was 30 min, and the temperature was 50 °C. It has the characteristics of high efficiency, low energy consumption, and no pollution. And does not affect the nature of the pigment.
Application
Black sesame pigment has good water solubility, stability to light and heat, sugar and salt tolerance, safe and non-toxic. As a natural pigment, it has broad development prospects and high utilization value.
1 as a natural antioxidant
It has strong in vivo and external antioxidant capacity is a very potential natural melanin and is a good natural antioxidant resource.
2 as a food additive
As one of the natural food pigments, in the food industry, black sesame pigment has been widely used in black food
The coloring of products and the development of functional food and healthy food. Such as black cakes, biscuits, and instant noodles, and can also be used as black-bone chicken essence and black-bone chicken oral liquid.
3 Used as raw materials for daily chemical products
It is also well-used in the daily chemical industry. A combing agent prepared with it as a base material not only has the conventional combing effect, but also makes the hair bright and smooth, and has certain hair care and hair dyeing effects. In addition, high-end eyebrow pencils, lipsticks, soaps, etc. can also be produced.
