刘 荔,李天荣.膨化食品中菌落总数测定结果的不确定度评定[J].食品安全质量检测学报,2018,9(5):1158-1162
膨化食品中菌落总数测定结果的不确定度评定
Uncertainty evaluation of measurement of aerobic plate count in puffed food
投稿时间:2017-12-20  修订日期:2018-03-08
DOI:
中文关键词:  膨化食品  菌落总数  不确定度  评定
英文关键词:puffed food  aerobic plate count  uncertainty  evaluation
基金项目:
作者单位
刘 荔 兰州市食品药品检验所 
李天荣 兰州大学化学化工学院 
AuthorInstitution
LIU Li Lanzhou Institute for Food and Drug Control 
LI Tian-Rong College of Chemistry and Chemical Engineering, Lanzhou University 
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中文摘要:
      目的 对膨化食品中菌落总数检测结果进行不确定度评定, 确保检测结果的准确可靠。方法 根据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》、SN/T 4091-2015《食品微生物学 测量不确定度评估指南》和JJF1059.1-2012《测量不确定度评定与表示》, 对膨化食品中的菌落总数进行测定, 对产生不确定度的来源进行分析, 并对其不确定度进行评定。结果 对不确定度的分量进行量化和合成, 合成不确定度为0.0295, 扩展不确定度为0.0617。该批样品菌落总数的置信区间范围为1.1×104≤X≤1.4×104 CFU/g。结论 影响膨化食品中菌落总数不确定度的主要因素是样品重复测量引入的不确定度。
英文摘要:
      Objective To evaluate the uncertainty of the aerobic plate count in puffed food to ensure the accuracy and reliability of determination results. Methods According to GB 4789.2-2016 Microbiological examination in food of aerobic bacterial count, SN/T 4091-2015 Guidelines for the estimation of measurement uncertainty for quantitative detections, and JJF 1059.1-2012 Evaluation and expression of uncertainty in measurement, the aerobic plate count in puffed food was measured and the uncertainty assessment in the detection was analyzed. Results Each component of uncertainty was quantified for the calculation of the combined uncertainty, the combined uncertainty was 0.0295, and the expanded uncertainty was 0.0617. Confidence interval of the measurement result was 1.1×104≤X≤1.4×104 CFU/g. Conclusion The main factor affecting the uncertainty of aerobic plate count in puffed food is the uncertainty introduced by repeated sample detection.
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