中文摘要：

目的：优选干大枣叶中叶绿素的提取工艺。方法：以大枣叶为原料,采用单因素试验及L9（34）正交试验方法,通过紫外分光光度法检测出叶绿素含量。结果：优选出最佳提取工艺为采用14倍量60%乙醇提取2次,每次0.5h。结论：所得工艺稳定可行,能够指导工业化生产。

英文摘要：

Objective ： The objective of this study was to optimize the decoction process of chlorophyll in dried jujube leaves. Methods ： Jujube leaf as raw material, the content of chlorophyll was determined by ultraviolet spectrophotometry, single factor experiment and L9（34） orthogonal test. Results： The optimum extracting condition was .. extraction 0.5 hour, extraction twice, and the ratio of 60% ethanol volume to the leaves weight was 14. Conclusion.. The extraction process is stable and feasible, and can be used for industrial production.