ISO 760-1978 - 中外标准 - - 1978/12 - 现行
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.
连接化合物电解分析法卡·弗歇尔试剂化学分析化学分析和试验量电分析含量测定容量分析水Chemical analysis and testingConnectionsDetermination of contentElectro-analytical methodsKarl Fischer reagentVolumetric analysisWater
CNS 4446-2009 - 中外标准 - - 1978/7 - 现行