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采用气相色谱法，选择萘为内标物，测定桂林西瓜霜中冰片及薄荷脑的含量，可作为该制剂质量控制指标之一。
Using gas chromatography, naphthalene was selected as the internal standard, and the content of borneol and menthol in Guilin watermelon cream was determined. It can be used as one of the quality control indicators of the preparation.