| 凯氏定氮法测定大米中蛋白质的不确定度分析 |
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| 引用本文： | 张晔,张欢.凯氏定氮法测定大米中蛋白质的不确定度分析[J].粮食储藏,2011,40(1):48-50. |
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| 作者姓名： | 张晔 张欢 |
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| 作者单位： | 1. 安徽理工大学,232001;淮南市产品质量监督检验所,232001
2. 黄石产品质量监督检验所,湖北,435000 |
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| 摘 要： | 采用GB/T5009.5-2003第一法,凯氏定氮法测定大米中蛋白质的含量,其测量不确定度来源于样品称量、消化、定容、移取消化液、蒸馏及滴定等过程。通过对各个不确定度分量的计算合成,找出影响测量不确定度的因素,并对各个不确定度分量进行评估,最终分析出样品大米中蛋白质的标准不确定度及扩展不确定度并描述了影响大米蛋白质测定结果各分量对其不确定度的相对贡献。
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| 关 键 词： | 大米 凯氏定氮法 蛋白质 不确定度 |
UNCERTAINTY ANALYSIS ON DETERMINATION OF PROTEIN IN RICE BY KJELDAHL METHOD |
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| Zhang Ye,Zhang Huan.UNCERTAINTY ANALYSIS ON DETERMINATION OF PROTEIN IN RICE BY KJELDAHL METHOD[J].Grain Storage,2011,40(1):48-50. |
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| Authors: | Zhang Ye Zhang Huan |
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| Institution: | Zhang Ye1,2 Zhang Huan3(1 Anhui University of Science and Technology 232001)(2 Huainan Institute of Products Quality Supervision and Inspection 232001)(3 Huangshi Institute of Products Quality Supervision and Inspection 435000) |
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| Abstract: | Protein content in rice was determined by Kjeldahl method,the first method of GB/T5009.5-2003,the measurement uncertainty was tracked from such experimental processes as sample weighing,digestion,volume,pipet digestion,distillation and titration etc..By calculation and synthesis of each component uncertainty,it figured out the factors affected the measurement uncertainty,and evaluated the uncertainty of each component,analyzed the standard uncertainty and expanded uncertainty of protein in rice samples,and ... |
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| Keywords: | rice kjeldahl method protein uncertainty |
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