BS EN ISO 3188-1994 淀粉及其制品.用克耶达(Kjeldahl)法测定含氮量.滴定法

标准号：BS EN ISO 3188-1994
中文标准名称：淀粉及其制品.用克耶达(Kjeldahl)法测定含氮量.滴定法
英文标准名称：Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
标准类型：X11
发布日期：1994/11/15 12:00:00
实施日期：1994/11/15 12:00:00
中国标准分类号：X11
国际标准分类号：67.180.20
适用范围：The found value only includes free amino acids, compounds producing amino acids on hydrolysis and ammonium compounds. The principle consists in destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, distillation of the liberated ammonia and collection in a boric acid solution, followed by titration with a standard volumetric sulphuric acid solution. The method applies to contents greater than 0,01 % (m/m). For products with contents less than 0,025 % (m/m), see ISO 5378.