標(biāo)準(zhǔn)號(hào)：BS EN ISO 3188-1994
中文標(biāo)準(zhǔn)名稱：淀粉及其制品.用克耶達(dá)(Kjeldahl)法測定含氮量.滴定法
英文標(biāo)準(zhǔn)名稱：Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
標(biāo)準(zhǔn)類型：X11
發(fā)布日期：1994/11/15 12:00:00
實(shí)施日期：1994/11/15 12:00:00
中國標(biāo)準(zhǔn)分類號(hào)：X11
國際標(biāo)準(zhǔn)分類號(hào)：67.180.20
適用范圍：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.