Quality assurance through laboratory reference materials (LRMs): dataset for non-certified elements (Al, Fe, Li, Mn and Pb) in estuarine sediment BCR-277R
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AuthorsGuitart, C. (Carlos); López-Galindo, C. (Cristina); Rejas, M. (Marta); Schultze, F. (Fernando); Gamaza, A. (Ana); Fernández-Turiel, J.L. (José Luis); Besada, V. (Victoria); Benedicto, J. (José)
material de referencia
analytical quality assurance
aseguramiento de la calidad analítica
Three specialized laboratories examined the determination of non-certified trace elements (Al, Fe, Li, Mn and Pb) in a commercial CRM and therefore, produced a so-called laboratory reference material (LRM). The dataset (total mass fractions and their associated uncertainties) were estimated both using parametric and non-parametric methods. The results provided a coherent assessment for all except for Pb, in agreement with the results found by the CRM producer. We discuss the feasibility of the implementation of small-sized specialized laboratory comparisons to produce LRMs (from CRMs) for non-certified chemicals and strongly discourage attempts by a single laboratory.
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