ISO 3332-1975 工业用硫酸铵 氨态氮含量的测定 蒸馏后滴定法

标准号：ISO 3332-1975
中文标准名称：工业用硫酸铵 氨态氮含量的测定 蒸馏后滴定法
英文标准名称：Ammonium sulphate for industrial use; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
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：71.060.50
适用范围：Based on dissolution of a test sample in water, distillation of the ammonia after displacement by an alkali solution. Absorption in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.