ISO 760-1978 水的测定 卡尔·费休法(通用方法)

标准号：ISO 760-1978
中文标准名称：水的测定 卡尔·费休法(通用方法)
英文标准名称：Determination of water; Karl Fischer method (General method)
标准类型：G04
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G04
国际标准分类号：71.040.40
适用范围：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.