Uncertainty evaluation of Ge content in coal determined by AFS
The analysis of the measurement process and mathematical model for determining germanium content in coal using the hydride generation atomic fluorescence spectrometry(HG-AFS)method involves an examination of the sources of uncertainty for each component.The results indicate that the major sources of uncertainty in the measurement of germanium in coal by AFS are primarily attributed to the following aspects:fitting of the working curve,method recovery rate,and repeated sample measurements.Among these,the fitting of the working curve contributes the largest portion of uncertainty.When the germanium content in coal is 10.28 μg/g,the combined standard uncertainty is calculated to be 0.302 6 μg/g,with an expanded uncertainty of 0.605 2 μg/g(k=2).
atomic fluorescence spectrometrygermanium in coaluncertainty
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