测量不确定度是评定测量水平的指标,是判定测量结果质量的依据。一切测量结果都不可避免地具有不确定度,不确定度是由于测量误差的存在而导致被测量值不能肯定的程度,一切测量结果都不可避免地具有不确定度,大肠菌群的检测也不例外。根据国家标准和测量不确定度的评定方法以及国际通用的普松理论,评定牛乳中大肠菌群检测结果的不确定度。通过分析影响牛乳中大肠菌群平板计数法检测结果的不确定度来源,从而建立一种简单适用的大肠菌群平板计数不确定度评定方法。

Measurement uncertainty is the index to evaluate the measurement level and the basis to determine the quality of measurement results.All measurement results inevitably have uncertainty.Uncertainty is the uncertainty of the measured value due to the existence of measurement error,and the detection of coliform is no exception. According to the national standard,the evaluation method of measurement uncertainty and the international common Poisson theory,the uncertainty of detection results of coliform bacteria in milk was evaluated.By analyzing the sources of uncertainty affecting the detection results of plate counting method of coliform bacteria in milk,a simple and applicable evaluation method of plate counting uncertainty of coliform bacteria was established.