Method for extracting black pigment from black waxy corn complete cobs
A technology of black waxy corn and melanin, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of chemical toxicity, synthetic pigment without nutrition, etc., and achieve easy preparation, short production cycle and high quality of pigment Effect
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[0017] Through the following specific implementation examples, the present invention can be further understood, but the following examples are not limitations of the present invention.
[0018] The process for extracting melanin from the whole ear of black waxy corn involved in the present invention comprises the steps of:
[0019] 1. Using the whole ear of mature black waxy corn as raw material, drying until the water content is lower than 14%, and crushing;
[0020] 2. Degrease the pulverized raw materials with petroleum ether (60°C-90°C), and dry them;
[0021] 3. Extract twice with 12 times 0.05mol / HCL solution, 12 hours each time, collect the extract, and concentrate under reduced pressure;
[0022] 4. Dissolve the concentrated solution in a small amount of water, and after purification with D101 macroporous resin, first elute with distilled water until it becomes colorless, then use 50% ethanol solution as the eluent for eluting;
[0023] 5. Collect the eluent, recover...
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