原子荧光法测定化探样品中砷和锑的不确定度评定

运用不确定度的理论,通过实验研究,确定原子荧光法测定化探样品中砷、锑的不确定度主要来源于标准储备液、标准溶液配制过程、曲线拟合、样品制备过程和重复性测量5个方面,并对各个不确定度分量进行了评估和量化计算,建立了原子荧光法测定化探样品中砷、锑的不确定度的评定和计算方法,得出标准不确定度和扩展不确定度。当砷的含量为11.2×10-6时,其扩展不确定度U=0.8×10-(6k=2);当锑的含量为1.72×10-6时,其扩展不确定度U=0.11×10-(6k=2);并以不确定度的形式给出测试结果,为结果的测量准确度分析研究提供了理论和数据支持。

Uncertainty Evaluation of Arsenic and Antimony in Chemical Prospecting Sample by Atomic Fluorescence Spectrometry

Using the uncertainty the theory,by experiment and research,we ascertain that the uncertainty evaluation of arsenic and antimony in prospecting sample by Atomic Fluorescence Spectromety are standard stock solution,the preparing process of standard stock solution,curve fitting,the process of sample preparation and repetitive test.Each partial uncertainty of measurement was analyzed and calculated.The method of evaluated and calculated the uncertainty of arsenic and antimony in sample by atomic fluorescence spectrometry was developed.The standard and spread uncertainty was gained.When the concentration of As is 11.2×10^-6,the expanded uncertainty is 0.8×10^-6（k=2）,concentration of Sb is 1.72×10^-6,the expanded uncertainty is 0.11×10^-6（k=2）,and the measuring result should be demonstrated with uncertainty form,provided the theory and the data support for the result survey accuracy analysis research.