Evaluation of uncertainty in the determination of Al2O3 in coal ash composition
The sources of uncertainty in the determination of Al2O3 in coal ash using fluoride salt instead of EDTA complexometric titration were analyzed,and the standard uncertainty components of each source were evaluated.Based on this,the standard uncertainty was synthesized,and the extended uncertainty was finally determined before reporting the determination results.The evaluated result of Al2O3 in the coal ash composition according to the method in the text is:w Al2O3=(29.53±0.44)％,k=2.
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