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对第一终点ｐＨ小于３．７的两种一元弱酸混合酸溶液进行了半中和点法的可行性实验．结果表明，离解常数之比（Ｋａ２／Ｋａ１）大于２０倍时，参照半中和点法可以测量各组分酸含量，获得了较满意的结果．
The feasibility of the semi-neutral point method for two kinds of monobasic weak acid mixed acid solution with the first endpoint pH less than 3.7 was tested. The results show that when the ratio of dissociation constants (Ka2 / Ka1) is more than 20 times, the acid content of each component can be measured with reference to the semi-neutral point method, and the satisfactory results are obtained.