纳氏试剂分光光度法测定水中氨氮的不确定度分析  

Nessler's Reagent Spectrophotometry Uncertainty Analysis of Ammonia Nitrogen in Water

作　　者：戴丽 

机构地区：[1]深圳市华保科技有限公司,广东深圳518104

出　　处：《广东化工》2017年第16期237-239,共3页Guangdong Chemical Industry

摘　　要：本文采用纳氏试剂紫外可见分光光度法测定水中氨氮,结合实例分析氨氮测试过程中不确定度产生的来源及主要影响因素,对各不确定度分量进行评定及合成,并计算出合成不确定度和扩展不确定度。结果表明,水样氨氮测量结果为:1.30 mg/L;扩展不确定度:u=0.08 mg/L,k=2;校准曲线拟合对不确定度的影响较大,是氨氮测定不确定度的主要影响因素。This paper adopts Nessler＇s reagent ultraviolet visible spectrophotometric determination of ammonia nitrogen in water, based on the analysis of uncertainty sources of ammonia production and the main influence in the process of determination, to assess the uncertainty of the component, and to calculate the combined uncertainty and expanded uncertainty. The results show that the water ammonia nitrogen determination results for 1.30 mg/L; uncertainty： u=0.08 mg/L, k= 2; calibration curve fitting is larger, the influence of the uncertainty is a major influence of uncertainty of determination of ammonia nitrogen.

关 键 词：不确定度 氨氮 紫外可见分光光度法 

分 类 号：O65[理学—分析化学]