重铬酸钾法测定化学需氧量的不确定度评估

重铬酸钾法测定化学需氧量的不确定度评估
白晓琳沈阳工业大学石油化工学院,辽宁辽阳111003摘　要:重铬酸钾法测定化学需氧量是常用的测定化学需氧量的方法,也是国家标准GB11914-89中规定的方法,但对该方法的不确定度的计算尚未见报道.为此,用不确定度这一概念对重铬酸钾法测定化学需氧量中不确定度的来源进行了鉴别和分析,并针对一次测定结果对不确定度的大小进行了定量.[著者文摘]

关键词:重铬酸钾法 测定 化学需氧量 不确定度 评估
分类号:　X830.3[免标]文献标识码：A文章编号：1672-4410（2006）02-0120-04栏目信息：
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Evaluation of uncertainty in determination of chemical oxygen demand-dichromate methodBAI Xiao-lin School of Petrochemical Engineering, Shenyang University of Technology, Shcnyang 111003, ChinaAbstract:Dichromate method is a common method to determine chemical oxyen demand, which is also the stipulated method in state standard GB11914-89,but the calculation of its uncertainty was never reported. Thereforce, the concept of uncertainty was used to identify and analyze the sources of uncertainty in dichromate method of determining chemical oxyen demand. Aimed at one determination result, the uncertainty scale was quantified.[著者文摘]

Key words:dichromate method ; determination ; COD; uncertainty ; evaluation