樱桃红色素的提取及性质研究（Extraction and characterization of cherry red pigment）.docVIP

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2017-09-23 发布于河南
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樱桃红色素的提取及性质研究（Extraction and characterization of cherry red pigment）.doc

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樱桃红色素的提取及性质研究（Extraction and characterization of cherry red pigment）

樱桃红色素的提取及性质研究（Extraction and characterization of cherry red pigment） But the influence of the main problems is the application of supercritical extraction equipment investment cost is high, but due to the low polarity of CO2 makes this method of polar substances (such as sepu) separation is not ideal. (four) ultrasonic extraction Currently this method in extraction of Chinese herbal medicine in chemical composition is widely used, it is with cavitation, crushing, stirring and other special effects by ultrasonic, destruction of plant cells, the solvent penetration into the plant cells, so that in plants, dissolved in the solvent, through separation and purification, chemical the ingredients needed. Compared with the conventional extraction method, ultrasonic extraction has the advantages of simple experimental equipment, easy operation, short extraction time, high yield and no heating. Stabilization technology of natural pigment 1.3.3.1 add stabilizer Stabilizers mainly slow down the fading speed of pigments in the process of processing and storage. For example, semi skin acid can improve the thermal and light resistance of Xiantao red pigment, and the combination of anthocyanins with specific phenolic compounds can obviously improve the photostability of anthocyanins. 1.3.3.2 added antioxidants The main antioxidants studied are flavonoids, tannins, polyphenols and Vc, VE and other natural antioxidants. For example, carotenoids with Vc and VE can greatly improve the stability of light; ascorbic acid and tea polyphenols can increase the stability of amaranth red pigment to light, pH and temperature [19]. Japans SYC Chemical Corporation developed the three grain of wheat antioxidant against carotenoids, Anthocyanin, quinone pigments have significant stabilization of [17] 1.3.3.3 joins metal ion chelating agent It is mainly used to chelate metal ions and eliminate the influence of metal ions on pigments. For example, EDTA-Na2 can chelate gardenia yellow pigment in trace