复方紫荆皮水杨酸溶液质量分析与评价

摘要

目的：建立客观评价复方紫荆皮水杨酸溶液质量分析的方法，为其质量控制提供参考。方法采用紫外分光光度法测定该品中水杨酸含量，检测波长530 nm，采用酸碱滴定法检测该品中苯甲酸含量。结果水杨酸线性方程为 Y ＝0．0118X －0．0004，r ＝0．9999，在18．08～54．24 mg·L －1的浓度范围内，其浓度与吸收度呈良好的线性关系，回收率在98．5％～101．0％之间，RSD 均小于1．0％，样品在24 h 内稳定；苯甲酸回收率在98．5％～101．5％之间，RSD 均小于2．0％。结论该方法简便、快速，测定结果准确可靠，重现性好，可用于复方紫荆皮水杨酸溶液的质量控制。%Objective To establish an objective evaluation method for the quality analysis of compound redbud bark and salicylic acid solution,and to provide a reference for the quality control.Methods UV analysis was used for the determination of salicylic acid in this product.The detection wavelength was at 530 nm.The acid-base titration method was used for the determination of benzoic acid in this product.Results The linear response range was 18.08 ~54.24 mg·L -1 (r =0.999 9)of salicylic acid.The recovery rate was 98.5% ~101.0%.RSD was less than 1.0%.The sample was stable within 24h.The recovery rate was 98.5% ~101.5% of benzoic acid.RSD was less than 2.0%.Conclusions This method is simple,rapid,accurate and reliable,which can be used for the quality control of compound redbud bark and salicylic acid solution.