左旋多巴(Laevodopa)为一种弱碱性的氨基酸类药物,目前国内外均采用非水滴定法测定其含量。作者认为该法虽为一种较成熟的容量分析法,但至今仍存在一些问题。根据有关pH指示剂吸收度比值法的文献,我们对左旋多巴进行了测试。实验证明,结果良好。 Laevodopa is a weakly basic amino acid drug. At present, non-aqueous titration is used to determine its content. The author believes that although the law is a more mature capacity analysis, there are still some problems so far. According to the literature on the ratio of pH indicator absorbance, we tested levodopa. Experiments show that the result is good.