Overview of the approaches for estimating measurement uncertainty

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Video by: UTTV 13.08.2013 48120 views Chemistry and Material Science


Measurement uncertainty by the modelling approach: Determination of NH4+ in water 
Ivo Leito

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Step 1 - measurand definition 
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Step 2 - Measurement model
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Step 3 - Uncertainty sources: one by one 
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Step 4 - Finding values of input quantities 
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Step 5 - Standard uncertainties of input quantities 
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Step 6 - Calculating the value of the output quantity 
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Step 7 - Calculating the combined standard uncertainty 
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Step 8 - Finding the expanded uncertainty 
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Step 9 - Analysis of the uncertainty sources 
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Uncertainty by modelling approach,
Conclusion 1
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Uncertainty by modelling approach,
Conclusion 2
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Other distribution functions: the Student distribution
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Course introduction
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Why is measument uncertainty important?
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Principles of measurement uncertainty estimation: 4. Treatment of random and systematic effects
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Estimating the bias component of uncertainty
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The main equation of the Nordtest approach
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Overview of the practical implementation of the Nordtest approach
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Estimating the within-lab reproducibility component of uncertainty
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Roadmap of uncertainty estimation using the Nodrtest approach
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Example of uncertainty estimation using the Nordtest approach
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Finding the effective number of degrees of freedom
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Comparison of measurement uncertainty estimation approaches
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Uncertainty by modelling approach,
Conclusion 3
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A and B Type uncertainty estimates
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Pooled standard deviation
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