重铬酸钾法测定水中化学需氧量的不确定度评定

Uncertainty Assessment of Chemical Oxygen Demand in Water by Potassium Dichromate Method

文章立足实际,对重铬酸钾法测定水中化学需氧量的不确定度评定方法进行研究。阐述化学需氧量检测方法原理,而后分别从数学模型、不确定度的来源、输入量的标准不确定度评定方面,详细解析了不确定度的评定方式。

Based on the reality, the uncertainty assessment method of determining the chemical oxygen demand in water by potassium dichromate method is studied. The principle of chemical oxygen demand detection method is expounded, and then, the evaluation method of uncertainty is analyzed in detail from the aspects of mathematical model, the source of uncertainty and the standard uncertainty evaluation of input quantity.