Limitations, Pitfalls and Uncertainties

Which methods for analyzing variability and uncertainty are appropriate under what circumstances Which methods are appropriate when data are limited What are the strengths and weaknesses of different methods What are their main principles and pitfalls ... 

The naive prehistoric (in the traceability sense) method devised long ago is quite appropriate for providing reliable quantitative results and should be selected as a suitable candidate for any certification exercise where it is applicable, on condition that the analytical chemists applying it realise the inherent limitations and pitfalls and make an adequate uncertainty budget. 

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