半中和点法测定强酸与多元酸混合酸中各组分酸含量的条件

Detective condition of each acid content in mixture of strong and polyasic acid by half neutralization point method

强酸与多元酸混合情况下，在第一终点ｐＨ小于３．７，并且多元酸的Ｋａ１／Ｋａ２值大于３０倍以上时，可以用半中和点法测定各组分酸含量，并且在大于７０％时，经校正可以得到较满意的结果。

When the Ka1/Ka2 of polybasic acid was more than 30 times and pH<3.7 at the first terminal point, the content of each acid in the mixture of the strong acid and polybasic acid could be determined by the half neutralization point method and the fairly satisfactory results could be got by correcting at the was more than 70%.