蚕沙中果胶的分离提取及鉴定

用蛋白水解酶处理蚕沙，提取的果胶样品色质均达到食品标准。提取过果胶的蚕沙，仍可用于提取叶绿素。100g蚕沙，水抽提所得果胶量平均为0．7440g；草酸──草酸铵缓冲液抽提所得果股量为1．4618g；合并两次所得果胶样品总量为2．2058g，果胶回收率平均为2.21％。用本方法从1t蚕沙中平均可提取果胶约22．1kg。

Extraction and Identification of Pectin from Silkworm Excrement

The colour and the quality of the pectin extracted from the silkworm excrement trrated with protease can both reach the food standard. The silworm excrement from which the pectin has already been extracted can extract chlorophyll either. From 100 g silknorm excrement we can extract. 0.740 g pectin. The total amount of the sample of the pectin that we extract with oxalic acidoxalic ammonium buffer is 2. 2058 g. The average rate of pectin recovery is 2.21%. By means of this method we can extract about 22.1 kg pectin from one ton silkworm excrement.