| 气相色谱法测定乳粉中1-油酸-2-棕榈酸-3-亚油酸甘油三酯含量的不确定度评定 |
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| 引用本文： | 刘春霞,段国霞,刘丽君,李翠枝,吕志勇,陈静,宫慧丽,武伦玮.气相色谱法测定乳粉中1-油酸-2-棕榈酸-3-亚油酸甘油三酯含量的不确定度评定[J].乳业科学与技术,2022,45(6):33-36. |
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| 作者姓名： | 刘春霞 段国霞 刘丽君 李翠枝 吕志勇 陈静 宫慧丽 武伦玮 |
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| 作者单位： | （内蒙古伊利实业集团股份有限公司, 内蒙古 呼和浩特 010110） |
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| 摘 要： | 评定气相色谱法测定乳粉中1-油酸-2-棕榈酸-3-亚油酸甘油三酯（1-oleic-2-palmitic-3-linoleic acid triglyceride，OPL）含量的不确定度。根据JJF 1059.1—2012《测量不确定度评定与表示》和CNAS-GL 006：2019《化学分析中不确定度的评估指南》等标准，建立不确定度模型，分析气相色谱法测定乳粉中OPL的不确定度来源，对主要影响不确定度的要素进行评定。结果表明：6?份试样OPL测量结果的平均值为1.172?g/100?g，OPL含量测量结果的相对扩展不确定度urel为0.023 6，提供约95%的包含概率；试样溶解并定容后的溶液质量浓度引入的标准不确定度是主要不确定度来源。
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| 关 键 词： | 气相色谱法 1-油酸-2-棕榈酸-3-亚油酸甘油三酯 不确定度 相对合成标准不确定度 扩展标准不确定度 |
Uncertainty Evaluation for the Determination of 1-Oleic Acid-2-Palmitic Acid-3-Linoleic Acid Triglyceride Content in Milk Powder by Gas Chromatography |
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| LIU Chunxia,DUAN Guoxia,LIU Lijun,LI Cuizhi,Lü Zhiyong,CHEN Jing,GONG Huili,WU Lunwei.Uncertainty Evaluation for the Determination of 1-Oleic Acid-2-Palmitic Acid-3-Linoleic Acid Triglyceride Content in Milk Powder by Gas Chromatography[J].JOURNAL OF DAIRY SCIENCE AND TECHNOLOGY,2022,45(6):33-36. |
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| Authors: | LIU Chunxia DUAN Guoxia LIU Lijun LI Cuizhi LÜ Zhiyong CHEN Jing GONG Huili WU Lunwei |
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| Institution: | (Inner Mongolia Yili Industrial Group Co. Ltd., Hohhot 010110, China) |
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| Abstract: | The measurement uncertainty was estimated for the determination of 1-oleic-2-palmitic-3-linoleic acid triglyceride (OPL) content in milk powder by gas chromatography (GC). According to the Measurement and Expression of Uncertainty in Measurement (JJF 1059.1—2012) and the Guidance on Quantifying Uncertainty in Chemical Analysis (CNAS-GL 006: 2019), a mathematical model was established to analyze the sources of measurement uncertainty. The major factors affecting the measurement uncertainty were evaluated. Results showed that the average OPL content of six milk powder samples was measured to be 1.172 g/100 g. The relative expanded uncertainty (urel) was 0.023 6 with a coverage probability of approximately 95%. The standard uncertainty arising from sample preparation was the main source of uncertainty. |
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| Keywords: | gas chromatography 1-oleic acid-2-palmitic acid-3-linoleic acid triglyceride uncertainty relative synthetic standard uncertainty expanded standard uncertainty |
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