应用经典容量分析方法测定多组份混合酸,往往因为各组份之间PK相差太小,在各等当点处无明显突跃而发生困难。应用电位滴定若干点V-[H~+]数据直接求算分析结果,是克服此困难的一个有效方法。前人提出的直线法可由V-[H~+]数据得出二组份混合酸分析结果。但由于该法通过作平面 Determination of multi-component mixed acid using classical capacity analysis method, often because of the difference between the components of PK is too small, there is no obvious sudden jump at each equivalent point and difficult. It is an effective way to overcome the difficulty to calculate the analysis result directly by using the data of V- [H ~ +] titration. The straight line method proposed by predecessors can be obtained from the V- [H ~ +] two-component mixed acid analysis. However, due to the adoption of the law as a plane