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The mulberry fruits contain the fire, the amount of anthocyanin pigments, blood, Lee Yun brain, liver, diuretic, Run it and antioxidant role. Mulberry anthocyanins because of its attractive color, non-toxic, and has a variety of pharmacological dry ¨ health effects attracted the attention of scholars at home and abroad. Therefore, mulberry anthocyanins as a natural pigment in food, cosmetics and pharmaceutical industries will have broad application prospects. Subject to the dried fruit of mulberry raw materials, the system solvent extraction, ultrasonic assisted solvent extraction, the optimum microwave-assisted solvent extraction method; adsorption resin purification process for purification of mulberry pigment manhole; studied mulberry The stability of the pigment. The main results are as follows: (1) mulberry pigment extraction process optimization results: a solvent extraction of mulberry pigment: 0.01% HCl-70% ethanol as the extraction solvent, solid to liquid ratio of l: 15 ( w / v), extraction temperature 70 C , the extraction time was 90min. Under these conditions, the absorbance Abs extract 0.710; mulberry pigment b, microwave-assisted extraction best bar even: microwave-assisted extraction conditions, 0.01% HCl-70% ethanol as extraction solvent, the feed solution ratio of l: 10 (w / v), the microwave power is 300W, the microwave treatment time is 120s. Under this condition, the extract absorbance ABS O 833; c ultrasonic assisted extraction mulberry pigment optimal conditions are: the extraction solvent is 0.01% HCl-70% ethanol solution, the extraction power of 140W, the extraction time was 45min, solid-liquid ratio of 1:10 (w / v), under these conditions, the absorbance of the extract Abs: 0.766; comprehensive comparison of the three methods of extraction conditions to optimize the results of microwave-assisted method can significantly improve The effect of mulberry pigment extraction, followed by ultrasonic assisted Finally, the solvent extraction of mulberry pigment. (2) the macroporous resin purification mulberry pigment process conditions results: a comprehensive comparison of three resin AB-8, the HPD 400A, the HPD-100 mulberry pigment adsorption Lee desorption performance, AB-8 resin adsorption performance is good, the The desorption amount most people, is better for mulberry pigment purified a macroporous resin; b static adsorption the results of the test conditions, resin AB-8 mulberry pigment purified optimum adsorption conditions : adsorption l.5h, and adsorption temperature 30 ℃, solid to liquid at pH 2: c static the desorption test conditions results display. Resin AB. 8 mulberry pigment purified desorption optimum conditions were: desorption l 2. 5h, the desorption solution concentration of 70% ethanol, the pH of the desorption solution is 2. (3) the stability of the findings of the mulberry pigment: a mulberry pigment affected by the pH of the solvent. The color of the solution in a different pH environment, there are significant changes. Wherein, at a pH of 2 the color is dark purple, and in pH 2.6 ~ 3.6, the color is pink. Mouth H4.6 ~ 6.6, the color mauve to dark purple-red on the ground. PH7.6 ~ 8, the color is light blue: b, mulberry pigment shadow by temperature relatively large. Heating not only has damaging effects on mulberry pigment and continued heating accelerate the damaging effects; c, Vc mulberry pigment. vc good protective effect of mulberry pigment and certain hyperchromic role: d metal ions have significant impact mulberry pigment. Mg 2 , Mn 2 , Zn 2 , cu 2 ions can significantly increase mulberry pigment absorbance pigment the color q-certain synergies. Fe 2 have a certain impact on the mulberry pigment. Na, Al 2 , K mulberry pigment is not significant; e frozen environment of mulberry pigment significant impact; f, light mulberry pigment significant impact. Light stability of mulberry pigment destruction.
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