菌落总数测定结果不确定度的评定

Evaluation of uncertainty in the results of aerobic plate count

中文关键词:  菌落总数  不确定度  评定

英文关键词:aerobic plate count  uncertainty  evaluation

中文摘要:

      目的 对质控样中菌落总数测定结果进行不确定度评定。方法 菌落总数测定依据GB 4789.2-2016《食品安全国家标准食品微生物学检验 菌落总数测定》进行测定和结果判断, 再根据JJF 1059.1-2012《测量不确定度评定与表示》的规定, 对测定过程中引入的不确定度分量进行评定, 然后采用合成的方法来计算和评定菌落总数的不确定度。结果 扩展不确定度为0.08, 结果对数值取值区间为(3.85±0.08), 取反对数取值区间则为(5900, 8500)。结论 本方法可有效评定菌落总数的不确定度。

英文摘要:

      Objective To evaluate the uncertainty of the total number of colonies in the quality control sample. Methods The aerobic plate count was determinated and judged according to GB 4789.2-2016 “National Food Safety Standard for Microbiological Inspection of Food”. The uncertainty components introduced in the determination process were evaluated according to JJF 1059.1-2012 “Evaluation and Representation of Uncertainty in Measurement”. Then, the uncertainty of aerobic plate count was calculated and evaluated by a synthetic method. Results The extended uncertainty was 0.08, and the value range of the corresponding value was (3.85±0.08), and the value range of the opposite value was (5900, 8500). Conclusion This method is effective to evaluate the uncertainty of aerobic plate count.