ISO 7408:1983 肥料.用氢氧化钠处理时,有释放氨的其他物质存在的情况下氨型氮含量的测定.滴定法

标准编号:ISO 7408:1983

中文名称:肥料.用氢氧化钠处理时,有释放氨的其他物质存在的情况下氨型氮含量的测定.滴定法

英文名称:Fertilizers — Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide — Titrimetric method

发布日期:1983-12

标准范围

该方法包括在环境温度下,通过强气流将中等碱性试验混合物中的氨夹带到标准体积硫酸溶液中,并用标准体积氢氧化钠溶液反滴定多余的硫酸溶液。

The method consists in entraining, by means of a strong current of air, of the ammonia from a moderately alkaline test mixture at ambient temperature into standard volumetric sulfuric acid solution, and back-titrating of the excess sulfuric acid solution with standard volumetric sodium hydroxide solution.

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