标准摘要
[中文适用范围]： 指定了两种滴定方法，具体取决于终点是目视检测还是电测检测。 目视法仅适用于无色溶液，但在没有静电测量仪器的情况下也可使用。 电化学方法，无论是直接滴定还是反滴定，都是更准确的方法，因此推荐使用。 该测试的原理在于测试部分中存在的任何水与吡啶/甲醇混合物（卡尔费休试剂）中的碘和二氧化硫溶液的反应，事先通过用确切已知质量的水进行滴定来标准化。 [外文原描述]： Two methods of titration depending on whether the end point is detected visually or electrometrically are specified. The visual method is only applicable to colourless solutions but can be used when no electrometric apparatus is available. The electrometric method, whether by direct titration or back-titration, is the more accurate one and for this reason recommended. The principle of the test consists in reaction of any water present in a test portion with a solution of iodine and sulphur dioxide in a pyridine/methanol mixture (Karl Fischer reagent), previously standardized by titration with an exactly known mass of water.
英文名称Determination of water — Karl Fischer method (General method)