| 分光光度法测定苹果中硝酸盐含量的不确定度评定 |
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| 引用本文： | 郝晓莉,赵瑛博,陈芳芳.分光光度法测定苹果中硝酸盐含量的不确定度评定[J].安徽农业科学,2013,41(5):2269-2271. |
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| 作者姓名： | 郝晓莉 赵瑛博 陈芳芳 |
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| 作者单位： | 1. 辽宁省农业科学院开放实验室,辽宁沈阳,110161
2. 沈阳农业大学分析测试中心,辽宁沈阳,110866 |
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| 基金项目： | 辽宁省农产品质量安全检测与控制技术研究项目 |
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| 摘 要： | 目的]建立分光光度法测定水果中硝酸盐的不确定度评定方法。方法]通过对分光光度法测定苹果中硝酸盐含量的过程的研究,确定了测定结果的不确定度,建立了不确定度的数学模型,对各不确定度分量进行了合成和扩展,最终建立了苹果中硝酸盐含量的不确定度评定方法。结果]影响苹果中硝酸盐含量测量结果的不确定因素主要包括:称量不确定度、体积不确定度、曲线拟合不确定度、测量重复性引起的不确定度。苹果中硝酸盐含量不确定度报告为:(70.72±7.07)mg/kg,包含因子k=2。结论]研究可为准确测定水果中硝酸盐含量提供科学依据和理论支撑。
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| 关 键 词： | 硝酸盐 不确定度 分光光度法 |
Evaluation of Uncertainty in Spectrophotometry Determination of Nitrite in Apple |
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| Institution: | HAO Xiao-li et al(Opening Laboratory of Liaoning Academy of Agricultural Sciences,Shenyang,Liaoning 110161) |
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| Abstract: | Objective] To establish an evaluation method for uncertainty in spectrophotometry determination of nitrite in fruit.Method] The source of uncertainty in the spectrophotometry determination of nitrite in apple were investigated by analyzing the whole determination procedure,each uncertainty component was modeled,synthesized and expanded to develop a method for the evaluation of uncertainty in spectrophotometry determination of nitrite in apple.Result] The main uncertainties which affect the result include: measurement repeatability,nitrite mass determined by standard curve,sample dilution and sample weighting.The uncertainty report was that the nitrite content in apple was determined to be(70.72±7.07) mg/kg,k=2.Conclusion] The study can provide scientific basis and theoretical support for accuracy determination nitrite in fruit. |
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| Keywords: | Nitrite Uncertainty Spectrophotometry |
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