Evaluation of the Measurement Uncertainty for the Determination of Arsenic in Soil by Hydride Generation-Atomic Fluorescence Spectrometry

This paper introduced the evaluating method of uncertainty for determining the content of arsenic in soil by hydride generation-atomic fluorescence spectrometry.The method analyzed and distinguished the source of uncertainty in analysis process.The authors concluded the key factors of uncertainty of arsenic content measurement and important source of indefinite component are digestion sample.The evaluation indicated the uncertainty of standard curve was the second source of uncertainty.The uncertainty from standard stock solution adjusted and diluted and the repeated determination are subordinate factors.