碱滴定法测定紫菀中二氧化硫的残留  

Determination of Sulfur Dioxide Residue in Aster by Base-titration

作　　者：张盈盈[1] 苏胄豪 何月云[1] 梁华伦[1] 徐万帮[2] 

机构地区：[1]广东省中医院,广东广州510180 [2]广东省药品检验所,广东广州510180

出　　处：《中国民族民间医药》2016年第12期33-34,36,共3页Chinese Journal of Ethnomedicine and Ethnopharmacy

摘　　要：目的：建立碱滴定法在紫菀二氧化硫残留量测定并考察方法学。方法：采用碱滴定法测定紫菀二氧化硫残留量,通过重复性、线性等因素的考察建立符合紫菀二氧化硫残留量测定的方法。结果：采用碱滴定法测定紫菀中二氧化硫残留量的线性关系良好,其中Y=1.4055X＋0.0221,R^2=0.9998,回收率在92.16%-102.36%之间,重现性良好（RSD=2.8%,n=6）,检测限为12.5mg/kg。结论：该法操作简单,准确度高。Objective To establish a method for determination the residues of sulfur dioxide.in Aster by base titration.Methods The method was applied to determinate the residues of sulfur dioxide in aster,the repeatability,linearity,etc.Factors,which were in-vestigated.Results The linear relationship with the amount of good,y =1.4055x ＋0.0221,r2 =0.9998.Recovery rate between the 92.16% -102.36% and reproduce well （RSD =2.8%,n =6）,and the detection limit is 12.5mg/kg.Conclusion the method is simple and accurate.

关 键 词：紫菀 二氧化硫 滴定 

分 类 号：R284.1[医药卫生—中药学]