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The total uncertainty of environmental data has been a matter of concern since decades, but although most analysts recognise fully the existence of numerous error sources hidden in the analytical process (Equation 1), sampling included, nevertheless, collaborative studies on analytical uncertainty assessment are usually focussing on the analysis step only and ignore all uncertainties associated with the, sampling and the pre-analytical sample handling and treatment procedures.

Only in recent years, collaborative sampling error assessment studies are gaining some attention due to the growing awareness of the numerous problems associated with environmental sampling and the related error sources, such as the assessment of error sources by inter-laboratory field studies in sea water analysis for trace metals (Pb, Cd, Cu), which were found to vary up to a factor of 2500 according to sampler type employed. .

Additional information

Authors: MUNTAU H, JRC-Environment Institute, Ispra (IT);REHNERT A, JRC-Environment Institute, Ispra (IT);STELLA S, JRC-Environment Institute, Ispra (IT);SAHUQUILLO A, JRC-Environment Institute, Ispra (IT);BIANCHI M, JRC-Environment Institute, Ispra (IT)
Bibliographic Reference: EUR 19820 EN (2001), pp.159. Euro: Free of charge
Availability: Available free of charge by Liont Research Center (JRC)
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