Reseach on Uncertainty Evaluation of Water and Total Ash Content in Wheat Flour
According to Evaluation of Uncertainty in Chemical Analysis Measurement(JJF 1059.1-2012)and Guidance on Evaluating the Uncertainty in Chemical Analysis(CNAS-GL006:2019),the mathematical model of uncertainty in determination of water and total ash in wheat flour was established.Each uncertainty component was analyzed and the uncertainty of measurement was evaluated.The results showed that the expanded uncertainty was 0.069 g/100 g(k=2)when the total ash was 9.98 g/100 g,and 0.029 g/100 g(k=2)when water content was 0.58 g/100 g.
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