试题与答案

代表挥发油中酯类成分含量的指标是( ) A．酸值 B．酯值 C．pH值 D．

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题型：单项选择题

题目：

代表挥发油中酯类成分含量的指标是( )

A．酸值
B．酯值
C．pH值
D．皂化值
E．折光率

答案：

参考答案：B

解析： 挥发油的化学常数是指示挥发油质量的重要手段，化学常数的测定包括酸值、酯值和皂化值的测定。酯值是代表挥发油中酯类成分含量的指标。用水解1g挥发油中所含酯所需要的KOH毫克数表示。

考点：药学职称考试中药士基础知识初级中药士
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