ISO 5314:1981 肥料.氨型氮量的测定.蒸馏后滴定法

标准编号：ISO 5314:1981

中文名称：肥料.氨型氮量的测定.蒸馏后滴定法

英文名称：Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation

发布日期：1981-05

标准范围

该方法包括从碱性溶液中蒸馏氨，吸收过量的标准体积硫酸溶液，并用标准体积氢氧化钠溶液反滴定。它仅适用于不含尿素或其衍生物、氰胺和有机含氮化合物的情况。

The method consists in distilling of the ammonia from an alkaline solution, absorbing in an excess of standard volumetric sulphuric acid solution and back-titrating with standard volumetric sodium hydroxide solution. It is applicable only in the absence of urea or its derivatives, of cyanamide and of organic nitrogenous compounds.

标准预览图