常用于提取强心苷的溶剂是A:水B:乙醇C:氯仿D:丙酮E:70%~80%乙醇

作者: rantiku 人气: - 评论: 0
问题 常用于提取强心苷的溶剂是
选项 A:水 B:乙醇 C:氯仿 D:丙酮 E:70%~80%乙醇
答案 E
解析 强心苷多为低聚糖苷,少数为双糖或单糖苷,又因为有去氧糖的存在,使得强心苷有亲水性、弱亲脂性和亲脂性之分,但均能溶于甲醇、乙醇中,用70%~80%乙醇作溶剂,提取效率高,且能使酶失活。

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