炉甘石药材及饮片中氧化锌紫外-可见测定方法研究

Study on the Content of Zinc Oxide in Calamina Mineral Medicine and Pieces by Ultraviolet-visible Spectrophotometry

目的:建立炉甘石药材及饮片中氧化锌的紫外-可见测定方法。方法:应用紫外-可见分光光度法测定9批药材和13批饮片中氧化锌的含量,用锌试剂显色,以标准曲线法计算含量。结果:样品的平均回收率为99.72%,RSD 1.85%。结论:该方法准确、简便,可重复性好,适用于炉甘石药材及饮片的质量控制。

Objective： To establish the UV spectorphotometry for the determining zinc oxide content in crude drug and processed pieces of Calamina.Method： Chromogenic method of zinc reagent was used.The content of zinc oxide in 9 batches of crude drug and 13 batches of processed pieces were determined by UV spectorphotometry.Standard curve method was used in the calculation of the content.Result： The average recovery rate of sample was 99.72% with RSD 1.85%.Conclusion： This method is accurate,simple for the determination of zinc oxide.It is suitable for quality control of Calamina herbs and pieces.