桂皮来源于樟科植物肉桂Cinamomum cassia Presl的树皮,由本所生药室鉴定,含桂皮醛、桂皮酸等[袁阿兴等.药学通报1981;16(10):5]。根据制剂的需要,为提高桂皮提取液中桂皮酸的含量在提取工艺方面进行研究的基础上,我们又对该制剂的杂质处理方面进行了摸索。通过醇沉法,高速离心法和超滤法这三种方法的实验比较,超滤法制剂含 The cinnamon bark was derived from the bark of the cinnamon family Cinamomum cassia Presl. It was identified by the Institute’s biopharmaceuticals and contained cinnamon aldehyde and cinnamic acid [Yuan Axing et al. Pharmacy Bulletin 1981;16(10):5]. According to the needs of the preparation, in order to improve the content of cinnamic acid in the cinnamon extract based on the research of the extraction process, we also explored the impurity treatment of the preparation. Compared with the three methods of alcohol precipitation, high-speed centrifugation and ultrafiltration, ultrafiltration formulations contain