粮油加工(电子版)
糧油加工(電子版)
량유가공(전자판)
Cereals and Oils Processing(Electronic Version)
2014年
4期
53-55,59
,共4页
谷物及制品%钙%不确定度%评定
穀物及製品%鈣%不確定度%評定
곡물급제품%개%불학정도%평정
Cereals and derived products%Calcium%Uncertainty%Evaluation
根据JJF 1059-1999《测量不确定度评定与表示》技术规范要求,建立了谷物及制品中钙测定不确定度的数学模型,分析了不确定度的主要来源,对该方法所得结果的已识别来源的不确定度影响进行评价。结果表明:该测试方法的不确定度主要来源于重复性产生的不确定度,其他因素如称样量、标准溶液浓度和标准溶液滴定体积产生的不确定度相对比较小。用该法谷物及制品中钙含量是20.04mg/g,扩展不确定度为0.0530mg/g (95%, k=2)。
根據JJF 1059-1999《測量不確定度評定與錶示》技術規範要求,建立瞭穀物及製品中鈣測定不確定度的數學模型,分析瞭不確定度的主要來源,對該方法所得結果的已識彆來源的不確定度影響進行評價。結果錶明:該測試方法的不確定度主要來源于重複性產生的不確定度,其他因素如稱樣量、標準溶液濃度和標準溶液滴定體積產生的不確定度相對比較小。用該法穀物及製品中鈣含量是20.04mg/g,擴展不確定度為0.0530mg/g (95%, k=2)。
근거JJF 1059-1999《측량불학정도평정여표시》기술규범요구,건립료곡물급제품중개측정불학정도적수학모형,분석료불학정도적주요래원,대해방법소득결과적이식별래원적불학정도영향진행평개。결과표명:해측시방법적불학정도주요래원우중복성산생적불학정도,기타인소여칭양량、표준용액농도화표준용액적정체적산생적불학정도상대비교소。용해법곡물급제품중개함량시20.04mg/g,확전불학정도위0.0530mg/g (95%, k=2)。
According to demand of technical standard JJF 1059-1999 ‘Evaluation and Expression of Uncertainty in Measurement’ , mathematical model of measurement uncertainty on calcium residue in cereals and derived products was established. Main sources of uncertainty were analyzed and uncertainty effect results of identified source obtained by this method was evaluated. Results showed that uncertainty of test method mainly came from uncertainty generated from repeatability, whereas uncertainty generated from other factors were small, such as sample weight, standard solution concentration and titration volume of standard solution. Calcium content and expand uncertainty in cereals and derived products measured by this method were 20.04 mg/g and 0.0530 mg/g (95%, k=2), respectively.