ISO 3704-1976 工业用硫磺 酸度的测定 滴定法

标准号：ISO 3704-1976
中文标准名称：工业用硫磺 酸度的测定 滴定法
英文标准名称：Sulphur for industrial use; Determination of acidity; Titrimetric method
标准类型：G10
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：G10
国际标准分类号：71.060.10
适用范围：Applicable to products having acidities, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Describes the extraction of acidic substances with a mixture of water and propan-2-ol (isopropyl alcohol). Titration of the extract with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as indicator. The preparation of the sample from the laboratory sample is carried out by grinding a sufficient quantity of the undried material until it passes through a sieve of nominal mesh of 250 m.