Extracting times,ethonal volume,pH and extracting time were screened and L_9(3~4) orthogonal test were applied.

• 本文通过对金不换甲醇提取、无水乙醇提取、氨性氯仿提取和酸性乙醇提取等提取方法的比较与筛选；确定溶剂用量、提取次数、pH值和提取时间为影响因素；并以L9(34)正交设计表安排试验.