Research on the Technology for Extraction and Nature of Red Pigments From Purple Eggplant peel

[Objective]The study aimed to research the extraetive tcchhique and property on red pigment of purple eggplant peal.[Method]Take the purple skin tomato as raw material,ultrasohic assisted sdvent was used to extract the red pigment of purple eggplant peel.[Result]The results showed that when the ultrasonic powere mas 150 W,the best extraction solvent was 4.5% citric acid,the best extraction temperature was 60 ℃,optimum extraction time was 40 min the best material to liquid ration of 1∶200.The red pigment of purple eggplant peel was a water soluble pigment and its stability was poor for light,high temperature,Al3+ and Fe3+.pH,oxidizing ogents,reducing agent,sodium benzoate and sucrose had different effects on the stability of pigment.[Condusion]It provided theoretical basis for the development and application of the red pigment of purple eggplant peed.