气相分子吸收光谱法测定水中亚硝酸盐氮浓度不确定度评定  

Evaluation of Uncertainty Measurement of Nitrite-Nitrogen in the Solution by the Gas-phase Molecular Absorption Spectrometry

作　　者：余海霞[1] 叶旭红[1] 郑桂芳[1] 王黎佳[1] 

机构地区：[1]杭州市环境监测中心站,杭州310007

出　　处：《工业安全与环保》2013年第10期20-22,共3页Industrial Safety and Environmental Protection

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07527-003)科研成果

摘　　要：采用气相分子吸收光谱仪法测定水样中亚硝酸盐氮的浓度,对其不确定度来源进行分析、评估。结果表明,当水样质量浓度为1.02 mg/L时,考虑测定过程的标准溶液的配制、曲线拟合、仪器测量重复性等因素对测定结果造成影响,测得亚硝酸盐氮的相对合成标准不确定度为0.03 mg/L,其中最主要的分量是由亚硝酸盐氮标准溶液引起的测量不确定度。The nitrite-nitrogen concentration in the water is measured by the gas-phase molecular absorption spectrometry, and the impacts of major sources of uncertainty measurement are researched. The result shows that when nitrite-nitrogen concentration in the solution is 1. 02 mg/ L, considering the effects of preparation of standard solution, curve coupling and the repeatable instrument measurement on the measured results, the expanded standard uncertainty is 0. 03 mg/ L and the standard nitrite-nitrogen solution is the main source of uncertainty among these factors.

关 键 词：亚硝酸盐氮 测量不确定度 气相分子吸收光谱仪 

分 类 号：O661.1[理学—分析化学]