HJ505-2009法测定生化需氧量[BOD_5]不确定度评定

测量不确定度（uncertainty of measurement）是表征合理地赋予被测量之值的分散性,与测量结果相联系的参数。不确定度一词指可疑程度,广义而言,测量不确定度是对测量结果正确性的可疑程度。如何对测量结果的不确定度进行合理评定,一直是困扰检测实验室的一个难题。依据HJ505—2009标准的方法,测定了水样的生化需氧量BOD5,估算了测试过程中的随机效应和系统效应所产生的不确定度分量,最终评定了生化需氧量浓度的测量不确定度。

Evaluation of Uncertainty in Determination of by HJ505-2009

Uncertainty of measurement signifies for the dispersive of the value measured rationally,with measuring the parameter and interrelated result.The mean of uncertainty is suspicious intensity,Uncertainty of measurement fruit suspicious intensity of exactness measuring in broad sense.How to rationally assess the uncertainty of measure results disturb the laboratories all the time,The paper aims to determine the BOD5 in water sample in accordance with HJ505—2009.The uncertainty produced by random effect and system effect is estimated and the uncertainty of the determination of BOD5 is evaluated.