Determination and Extraction Study on Chlorogenic Acid in Eucommia Ulmoides Leaves of Shangluo

Alcohol-water mixture was used to extract chlorogenic acid from eucommia ulmoides leaves of Shangluo City. The optimum technological conditions were as follows: alcohol concentration was 60 percent, extraction temperature was 80℃, extration time was 2.5 h, and solid to liquid ratio was 1:20. Extration ratio of chlorogenic acid was 2.114% under the optimum conditions.The extration method was simple and the result was accurate. It is valuable for chlorogenic acid extraction from eucommia ulmoides leaves in quantity.