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现行 ISO 7408:1983
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Fertilizers — Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide — Titrimetric method 肥料和灰分;在使用氢氧化钠处理时释放氨的其他物质存在的情况下测定氨氮含量——滴定法
发布日期: 1983-12-01
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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归口单位: ISO/TC 134
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