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槲皮素是杜仲叶中一种黄酮类化合物。近年来研究表明，杜仲叶中主要有效成分棚皮素具有抗自由基等作用。因此，测定杜仲叶中槲皮素的含量，可以评价原料的质量。本文建立了HPLC法测定杜仲叶中槲皮素含量的测定方法。1仪器与试药1．1仪器：Varian高效液相色谱仪；2510泵；2550可
Quercetin is a flavonoid in Eucommia ulmoides leaves. In recent years, studies have shown that the main effective component of eucommia ulmoides leaves has anti-free radical effects. Therefore, the content of quercetin in the leaves of Eucommia ulmoides was measured to evaluate the quality of the raw materials. This article established a HPLC method for the determination of quercetin content in Eucommia leaves. 1 Instruments and reagents 1.1 Instruments: Varian HPLC; 2510 pump; 2550 available