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目前,已有不少对食品中总砷含量测定的研究。但对食品中总砷含量测定结果的不确定度评定较少。本文以黄洋葱粉中总砷含量测定过程为例,通过相应的测量模型,对测量中各参数进行不确定度来源分析,计算测量结果的扩展不确定度,从而分析影响检测结果准确性的主要和次要因素,确保检测质量。一、设备、耗材与方法(一)设备、耗材1.主要设备:AFS-9700双道原子荧光光度计,北京海光仪器公司;FA224万分之一电子天平,上海舜宇
At present, there are many studies on the determination of total arsenic in food. However, the determination of total arsenic in food products, the uncertainty of the assessment of less. In this paper, the determination of total arsenic in yellow onion powder is taken as an example. According to the corresponding measurement model, the sources of uncertainty of each parameter in the measurement are analyzed and the extended uncertainty of the measurement results is calculated to analyze the main influencing factors And secondary factors, to ensure the quality of testing. First, the equipment, supplies and methods (A) equipment, supplies 1. Major equipment: AFS-9700 dual-channel atomic fluorescence photometer, Beijing Haiguang Instruments; FA224 ten thousandth electronic balance, Shanghai Sunny