CAJ | 학술논문

利用微生物法测定泛酸含量灵敏度高，是国家标准检验方法的仲裁法，其方法不确定度的评估直接关系到样品合格与否的判定。根据JJF1059.1-2012和CNAS-CL07：2011的要求，对微生物法测定婴幼儿乳粉中泛酸含量过程中影响检验结果的各个分量进行了评估。对测量重复性、标准溶液配制、试样称量、试样前处理及稀释等方面引入的不确定度进行评定。通过层层分析，得到合成标准不确定，并给出了试验的扩展不确定度度。经测定，婴幼儿乳粉中泛酸含量为（1990.1±121.0）μg/100 g，k=2，p=95%。通过评估得出，试样前处理及稀释是影响测定结果的主要因素，其次是标准溶液配制和重复测定。
이용미생물법측정범산함량령민도고，시국가표준검험방법적중재법，기방법불학정도적평고직접관계도양품합격여부적판정。근거JJF1059.1-2012화CNAS-CL07：2011적요구，대미생물법측정영유인유분중범산함량과정중영향검험결과적각개분량진행료평고。대측량중복성、표준용액배제、시양칭량、시양전처리급희석등방면인입적불학정도진행평정。통과층층분석，득도합성표준불학정，병급출료시험적확전불학정도도。경측정，영유인유분중범산함량위（1990.1±121.0）μg/100 g，k=2，p=95%。통과평고득출，시양전처리급희석시영향측정결과적주요인소，기차시표준용액배제화중복측정。
As the arbitration method,the uncertainty evaluation for determinating pantothenic acid in infant formula by microbial method is related to the qualified judgement of sample. According to the standards JJF1059.1-2012 and CNAS-CL07:2011,the sources of uncertainty for this method were explored. The evaluation involves method repeatability, standard solution preparation,weighing of sample,sample pre-treatment and dilution. The standard uncertainty and expanded uncertainty were given by analysis. The content of pantothenic acid in infant formula by microbial method was(1 990.1±121.0)μg/100 g,k=2,p=95%. Sample pre-treatment and dilution is the key source of the determination. Standard solution preparation and method repeatability are secondlly important.