清半夏饮片中白矾的残留量测定

Determination of Alum Residual Amount in Rhizoma Pinelliae Preparata

目的测定清半夏饮片中白矾的残留量,考察不同饮片企业生产的清半夏饮片中白矾残留量差异,为清半夏质量控制提供科学依据。方法采用Na2EDTA滴定法测定。结果不同饮片生产企业生产的清半夏饮片中白矾残留量差异显著,其中最高为10.59%,最低为6.26%。结论所建立的测定方法操作简单,重复性好,结果准确可靠,可用于清半夏饮片中白矾的限量控制。

Objective To establish a method for the determination of alum residual amount in Rhizoma Pinelliae Preparata from different companies, and to provide a scientific evidence for quality evaluation of Rhizoma Pinelliae Preparata. Methods Na2EDTA titration method was applied for the quantitative analysis. Results There were obvious differences m residual quantity of alum in Rhizoma PineIliae Preparata from different companies. Conclusion The method is simple, reproducrble and accurate, it can be used for the determination of alum residual amount in Rhizoma Pinelliae Preparata.