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复混肥料中总氮含量的测定 ,应用 GB/T 85 72蒸馏后滴定法 ,过程复杂费时。笔者在多年的分析实验中 ,对以酰胺态氮、铵态氮存在的复混肥料 ,总结出 1套省时、准确度高的分析方法 ,现介绍于下 :1 方法原理试样和过量硫酸共同加热 ,生成硫酸铵并放出二氧化碳。CO( NH2 ) 2 +H2 S
Determination of total nitrogen in compound fertilizers, the application of GB / T 85 72 distillation titration, the process is complex and time-consuming. In many years of analytical experiments, the author summed up a set of time-saving and high-accuracy analytical methods for the compound fertilizers containing amido and ammonium nitrogen. The method is described in the following: 1 Principle and excessive amount of sulfuric acid Together heating, generate ammonium sulfate and emit carbon dioxide. CO (NH2) 2 + H2S