本文推导了单元酸标准加入法的线性公式。在被测酸溶液中,等量加入同种酸的标准溶液多次,并记录pH值,代入线性公式计算后即可得一直线,该直线在纵轴上的截距为被测酸浓度,斜率为该酸的条件稳定常数。本文还对单元酸及其共轭碱的标准加入法同时测定进行了研究。 In this paper, the linear formula for the standard addition of monobasic acids is deduced. In the test acid solution, the same amount of standard solution of the same acid was added several times, and the pH value was recorded, substituted into the linear formula can be obtained after a straight line, the linear intercept on the vertical axis of the measured acid concentration, The slope is the conditional stability constant of the acid. In this paper, the simultaneous determination of monosodium acid and its conjugate base by standard addition method was also studied.