Eucommiae Folium (duzhongye) is a widely used herbal remedy in Traditional Chinese Medicine, and the quality of the leaves used to make a variety of finished products is often evaluated via HPLC analysis. Following the Chinese Pharmacopoeia (2020 Edition) assay and using a 爱游戏平台注册登录 LC 300 and Epic C18 column, this Application Brief provides a robust solution for labs performing, or looking to offer, this test.