Mat Control: a new laboratory for the preparation of reference materials at the University of Barcelona, Spain

We evaluate the uncertainty in organic elemental analysis of C, H, N, and S. We use data from six proficiency tests (PTs), in which some 35 Spanish laboratories participated. The uncertainty of the technique is estimated from the relative within-laboratory and between-laboratory variances for pure substances and samples with complex matrices (soil, powdered milk, oil, ash, and petroleum coke). We also calculate the relative standard uncertainties for individual laboratories when analysing pure substances using historical data from the participation of each laboratory in different editions of PTs. The uncertainty values obtained for the individual laboratories are comparable with the uncertainty of the technique and correlate with the combined z-scores. The evolution over time of those laboratories participating in common editions of PTs is also evaluated.

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Uncertainty estimation in organic elemental analysis using information from proficiency tests

Companyó

Rubio

Sahuquillo

et al. 2008

Anal Bioanal Chem

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Pueyo

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et al. 2005

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Mat Control: a new laboratory for the preparation of reference materials at the University of Barcelona, Spain

Cited by 4 publications

References 6 publications

Uncertainty estimation in organic elemental analysis using information from proficiency tests

Uncertainty estimation in organic elemental analysis using information from proficiency tests

A new quality control material for marine environmental analysis

A new quality control soil material for monitoring trace metals in accidentally polluted areas

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