关键词: 豆腐柴, 复合提取, 蛋白质, 果胶

Abstract: This paper extracted the protein and pectin from Premna Micropheua leaves by means of compound extraction.At first, the result indicated the content of base-soluble protein >water-soluble protein > alcohol-soluble protein >salt-soluble protein through the protein -extracting using different solution and establishment optimum condition and parameters of pectin- extracting form clear liquor and residue after protein-extracting.At the same time , by use of the single factor experiment of extraction liquid, pH, time, salt concentration in the salting-out of pectin, adding the orthogonal test of extraction temperature, pH, time the rate of solid to solution ,the author gained the optimum condition of compound extracting protein and pectin form Premna Microphylla: the ideal compound extractant is salt liquor. The optimum condition of extracting pectin: the extraction temperature 90℃, time 70minture the pH of liquor 2.5, the rate of solid to solution 1:45. In this condition, the ration of pectin gained 22%, at the same time it can gain 0.155% protein.

Key words: Premna Micropheua, compound extraction, protein, pectin