对甲苯磺酸含量检测方法的研究

Research on Detection Methods of p-Toluene Sulfonic Acid Content

为了检测对甲苯磺酸的含量，分别采用了EDTA返滴定法、紫外分光光度法、玫瑰红酸钠-BaCl2容量法对样品进行测定，并对实验误差及引起误差的原因进行了详尽的分析和探讨，同时得到了3种实验方法的回收率。实验结果表明：用EDTA返滴定法测定结果的相对标准偏差（RSD）为0．91％，加标回收率（R）为98．23％。99．54％；紫外分光光度计法测定结果的相对标准偏差（RSD）为4．87％，加标回收率（R）为104．77％。118．05％；玫瑰红酸钠-BaCl2法测定结果的相对标准偏差（RSD）为0．29％，加标回收率（R）为99．58％～100．08％。

In order to detect content of p-toluene sulfonic acid, EDTA back titration,ultraviolet spectrophotometry and rosy acid sodium-BaC12 volumetric method were respectively used to detect the sample. The experiment deviation and reasons to result in the deviation were analyzed particularly. The recovery rates ＆three experiment methods were obtained at the same time. The result shows that the relative standard deviation of EDTA back titration is 0.91%, the recovery is in the range of 98.23% to 99.54%; the relative standard deviation of ultraviolet spectrophotometry is 4.87% and the recovery is in the range of 104.77% to 118.05%; the relative standard deviation of rosy acid sodium-BaC12 volumetric method is 0.29% and the recovery is in the range of 99.58% to100.08%.