OBJECTIVE: To determine the critical relative humidity (CRH) of Compound Pyrola capsules.

目的：测定复方鹿衔草胶囊临界相对湿度(CRH)。

CONCLUSION The results showed that this method is sensitive, simple, specific and accurate for the determination of homoarbutin in Pyrola of different species and the control of quality of Pyrola .

结论本法灵敏、简便、准确，可用于鹿衔草的含量测定和质量控制。