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Study on Technology of Extracting Pectin from Cactus

Zhao Hua Chen Xiao-yuan Tianjin Scientific & Technical University(Tianjin 300222)  
The process of extracting pectin from the cactus through acid-hydrolysis method was studied in this paper.The optimal process conditions were gained by orthogonal tests as follows:the ratio of material and extraction solvent is 1:12;pH 2.0 with sulphuric acid,extracting 2h under 95℃.Adding 1% granular active carbon into extract to decolorize for 40min under 60℃.The pectin with 70% purity was obtained through adding alcohol to 80% in concentrated liquid with vacuum.The extracting yield of the pectin is 17.8%(dry basis)
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