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Research on the Ultrasonic Extraction Technology of Pigments from Orange Peel

JIANG Shao-juan et al (Department of Biological and Chemical Engineering,Panzhihua University,Panzhihua,Sichuan 617000)  
[Objective] The aim was to discuss the optimum condition of extracting pigments from orange peel by ultrasonic.[Method] The technology of extracting pigments from orange peel by ultrasonic was studied through single factor experiment,the optimum extraction technology was ascertained through orthogonal experiment and it was compared with the traditional thermal reflux method.[Result] 95% ethanol was selected as extractant.As the extraction temperature ascended,the extraction time extended,the ratio of material to liquid and the extraction times increased,the extraction amount of pigments from orange peel showed increasing trend.The optimum extraction technology was extractant of 95% ethanol,ratio of material to liquid of 1∶6,extraction temperature of 50 ℃,extraction for 3 times and 15 min once.Under this condition,the absorbance of the extracted pigments from orange peel was significantly bigger than that by thermal flux method.[Conclusion] The research provided reference foundation for further comprehensive utilization of orange peel.
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