Analysis and Evaluation of Uncertainty in Measurement of Arsenic Content in Coal by Hydride Generation Atomic Fluorescence Spectromitry
The uncertainty of detecting arsenic content in coal using hydride generation atomic fluorescence spectrometry is further explored to find the fundamental reasons for the uncertainty.The accuracy of the final result is influenced by many factors such as sample processing,detection reagents,and detection environment.A mathematical model was Innovatively designed,starting from multiple perspectives such as measurement repeatability,reagent solution concentration,and coal sample processing,to study and explore the fundamental factors of uncertainty.It was calculated that the combined standard uncertainty of arsenic in coal is 0.133 ug/g,and the sample arsenic content is(1.75±0.27)µg/g with coverage factor k=2.There are three core factors that affect uncertainty:the first,fitting the standard working curve;second,measurement repeat-ability;and third,coal sample processing.Therefore,during measurement,it is necessary to strengthen the control of factors such as sample processing,reagent solution,and measurement conditions.
万方数据
维普
