标准摘要
[中文适用范围]： GB/T 20432的本部分规定了照相级化学品碱度或酸度测定的通用试验方法。 [外文原描述]： The method is based on weighing the test portion, dissolution in carbon-dioxide-free water, adding phenolphthalein indicator, and observing the colour of the test solution: if the test solution turns pink, determination of the alkalinity, if it remains colourless, determination of the acidity.
英文名称Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity