当前位置: 首页 > 文章 > 火焰原子吸收法测定黄豆酱中钠的不确定度评定 安徽农业科学 2014,42 (4) 1175-1177+1180
Position: Home > Articles > Evaluation on Uncertainty in Measurement of Sodium in Soybean Paste by Flame Atomic Absorption Spectrometry Method Journal of Anhui Agricultural Sciences 2014,42 (4) 1175-1177+1180

火焰原子吸收法测定黄豆酱中钠的不确定度评定

作  者:
樊振江;陶颜娟;周昆
单  位:
宁波华标检测技术服务有限公司;漯河食品职业学院;宁波市鄞州区质量技术监督检测中心(鄞州区食品安全检测中心)
关键词:
火焰原子吸收;黄豆酱;钠;不确定度;营养标签
摘  要:
[目的]更科学合理地表示微波消解-空气-乙炔火焰原子吸收法测定食品中钠含量的测量结果。[方法]根据JJF 1059.1-2012《测量不确定度评定与表示》规范要求,以火焰原子吸收法测定黄豆酱中钠为例对测量不确定度进行评定。[结果]分析表明,影响测量结果的主要因素依次为试剂空白、标准物质和仪器测量时标准曲线的拟合;消解液的定容以及稀释引入的不确定度次之。用该法测得黄豆酱中钠含量为17 627 mg/kg,扩展不确定度为1 128 mg/kg(95%,k=2)。[结论]该评价方法及结果对营养标签中钠的准确标示有一定的指导意义。
译  名:
Evaluation on Uncertainty in Measurement of Sodium in Soybean Paste by Flame Atomic Absorption Spectrometry Method
作  者:
FAN Zhen-jiang;Luohe Vocational College of Food;
关键词:
Flame atomic absorption spectrometry;;Soybean paste;;Sodium;;Uncertainty;;Nutrition label
摘  要:
[Objective] In order to express the measurement results for sodium content in food by microwave digestion-air-acetylene flame atomic absorption spectrometry method more reasonably and scientifically.[Method] The uncertainty in measurement of sodium in soybean paste was evaluated according to Evaluation and Expression of Uncertainly in Measurement(JJF 1059.1- 2012).[Result]The results showed that the key factors of uncertainty were the blank of method,the standard solution and the fitting of calibration curve secondly.Constant volume and dilution were less important factors of uncertainty.The concentration of sodium was 17 627 mg / kg and the expanded uncertainty was 1 128 mg / kg(95%,k = 2).[Conclusion]The evaluation methods and results were important to label sodium content of nutrition label accuracy.

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