微生物法测定乳粉中VB_(6)含量的不确定度评定  

Evaluation of Measurement Uncertainty in Microbiological Determination of Vitamin B_(6) in Milk Powder

作　　者：刘璐 顾晟琳 夏亚文 LIU Lu;GU Shenglin;XIA Yawen(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 200233,China)

机构地区：[1]上海市质量监督检验技术研究院,上海200233

出　　处：《乳业科学与技术》2025年第2期30-34,共5页JOURNAL OF DAIRY SCIENCE AND TECHNOLOGY

摘　　要：为评定微生物法测定乳粉中VB_(6)含量的不确定度,依据GB 5009.154—2023《食品安全国家标准食品中维生素B6的测定》及JJF 1059.1—2012《测量不确定度评定与表示》对微生物法测定乳粉中VB_(6)含量过程中产生的各不确定度进行分析,计算合成标准不确定度、扩展不确定度。结果显示,乳粉中VB_(6)的含量为(9.34±1.23)mg/kg(取包含因子k=2,包含概率p=95%)。通过不确定度分量分析可知,测量重复性和标准溶液的制备对乳粉中VB_(6)含量测定影响较大。To evaluate the measurement uncertainty in the microbiological determination of the vitamin B_(6) content in milk powder,we estimated various uncertainty sources according to the National food safety standard for the determination of vitamin B_(6) in foods(GB 5009.154-2023) and the Evaluation and expression of uncertainty in measurement(JJF 1059.1-2012),and calculated combined standard and extended uncertainties.The results showed that the content of vitamin B_(6in) milk powder was(9.34 ± 1.23) mg/kg(k = 2,p = 95%).Through uncertainty component analysis,it was found that measurement repeatability and the preparation of standard solution had a significant impact on the determination of the vitamin B_(6) content in milk powder.

关 键 词：微生物法 乳粉 VB_(6) 不确定度 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程]