结论本方法快速、准确、稳定，适用于测定阿司匹林咀嚼片中游离水杨酸的含量。

Conclusion HPLC is quick and accurate of determining the content of free salicylic acid for chewing aspirin tablets.

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建立了高效液相色谱法（HPLC）同时测定注射用赖氨匹林中阿司匹林和游离水杨酸含量的方法。

The contents of aspirin and free salicylic acid in lysinipirine injection were determined by high performance liquid chromatography (HPLC).

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采用弱碱溶解蜂胶再酸化萃取的方法纯化样品，用返滴法测定，以水杨酸作为对照品检测样品中游离酸含量。

Propolis was dissolved in alkalescent condition and filtered. The filtrate was acidified and extracted after a degrease step. The purified sample was finally determined by back-titration.

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