脱痂软膏中氧化锌和龙脑的含量测定

Pharmaceutical Care and Research(2018)

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Abstract
目的:建立脱痂软膏中氧化锌和龙脑的含量测定方法.方法:采用配位滴定法测定氧化锌含量,通过考察水浴温度和时间、稀盐酸和磷酸氢二钠试液用量优化测定条件.采用气相色谱法测定龙脑含量.气相色谱条件:DB-5ms毛细管色谱柱(30 m×0.25 mm,0.25 μm);氢火焰离子化检测器(FID);载气:氦气,流速1.0 ml/min;进样口温度:180 ℃C;柱温:85℃C;检测器温度:200℃;分流比为10∶1.结果:氧化锌的平均回收率为(94.77±0.14)%(n=6).龙脑在0.053 7~0.214 8 mg/ml范围内线性关系良好(r=0.999 5),平均加样回收率为(96.34±0.74)%(n=6).结论:所建立的方法能够快速、准确地定量检测处方中的氧化锌和龙脑,可用于脱痂软膏的质量控制.
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Key words
Tuojia ointment,zinc oxide,borneol,content determination,chromatography,gas,coordination titration
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