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 test the content of p-toluenesulfonic acid, the methods of EDTA back titration, UV spectrophotometry and sodium rhodinate-BaCl2 volumetric method were used to determine the samples. The experimental errors and the causes of the errors were analyzed in detail. Explore, at the same time get the recovery of three experimental methods. The experimental results showed that the relative standard deviations (RSDs) were 0.91% and the spiked recoveries (R) were 98.23% ~ 99.54%. The relative standard deviations (RSDs) were determined by UV spectrophotometer. (RSD) was 4.87%, and the spiked recoveries (R) were 104.77% ~ 118.05%. The relative standard deviations (RSDs) were 0.29% and the spiked recoveries were 99.58% ~ 100.08 %.