半中和点法测定强酸与一元弱酸混合酸中各组分酸含量

Determination of each acid content in a mixture of strong and weakmonoacids by half neutralization point method

在强酸与一元弱酸混合酸的各组分酸含量测定中，为更简便，在理论上推导出结果的误差△Ｖｅ２／Ｙ２与△ｐＨ之间的关系式，从而求出ｐＨ大于３．７时第一终点的αＡ的允许最大值．由此提出混合酸标准溶液的半中和点为第一终点的各组分酸含量测定方法，方法简便、可靠．

The relative formula of the error value △Ve2/Vand △ pH was theoreticallydeduced in the determination of each acid content from a mixture of strong and weakmonoacids and the permited maximum aA -of the first terminal point was calculated whenthe pH is over 3.7. From that,the method of determinating each component acid contentof first terminal point was deduced by half neutralization point method of mixed acidstandard solution that was handy and reliable.