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研究了杜仲叶中氯原酸的提取分离条件。结果表明：以水为溶剂，将杜仲叶粉末于40℃下以1：6的料液比浸提4次，每次30min，氯原酸的浸出率为（94．11±0．53）％（n=3）。水提液经浓缩及分离纯化得氯原酸提取物，得率为（4．11±0．11）％（n=3），纯度为（23．73±0．55）％。
The extraction and separation conditions of chlorogenic acid from Eucommia ulmoides leaves were studied. The results showed that the leaching rate of chlorogenic acid was (94.11±0.53)% when water was used as the solvent to purify Eucommia ulmoides leaves powder at a ratio of 1:6 at 40°C for 4 times. (n=3). The aqueous extract was concentrated and separated to give a chlorogenic acid extract with a yield of (4.11±0.11)% (n=3) and a purity of (23.73±0.55)%.