一、绪言硝酸态氮素定量分析,普通多使用还原法与比色法两种。但有机质肥料如厩肥、堆肥含大量有色体、尿素、氯化物等杂质,以上两种方法,都不适用。动物粪便中,每含有大量铵盐及易于分解的各程氮的化合物。无论在酸性或 I. Introduction Nitrate nitrogen quantitative analysis, the general use of reduction and colorimetric two. However, organic fertilizers such as manure, compost with a large number of color bodies, urea, chloride and other impurities, the above two methods are not applicable. Animal manure, each containing a large number of ammonium salts and easy to decompose the nitrogen compounds. Whether in acid or