【摘要】 研究了用凯氏定氮仪测定氨氮的分析方法 ,与国标方法进行了显著性差异检验 ,结果无显著性差异 ,对环境标准样品测定结果满足要求 ,不同浓度样品加标回收率范围为 90 .7%～ 10 8.0 % ,RSD范围为 0 .2 2～ 3.1,检出限为 0 .0 80mg/L。更多还原

【Abstract】 Having studied the detemination of ammonia-nitrogen in water samples by the BCHI Kjeldahl line instrument and carried out different test of marked character with nation standard method, the writer gets the conclusions that the result of two ways are not markedly different.The result of determination of environmental standard sample meets need.The recovery rate range of dissimilar concentration sample is 90.7%～108.0%.RSD range is 0.22%～3.1%.The limit value of detection is 0.080 mg/L。更多还原