对化学需氧量两种测量方法不确定度评定报告的探讨

An Approach to Uncertainty Evaluation Reports of Two Methods for Determination of Chemical Oxygen Demand

应用美国国家环保局方法和传统的重铬酸钾法测定同一化学需氧量标准样品，并分别编写了测量不确定度评定报告。通过对两份不确定度报告的研究，讨论了由于测量方法的不同，造成不确定度评定报告的区别。

COD level of a standard sample was measured by using the U.S. EPA method and the conventional dichromate method respectively. Their uncertainty evaluation reports were prepared. Through studying those reports of two different methods, the distinction in between was discussed.