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Feasibility study for the preparation of certified reference materials part I – mineral oil contaminated soils
Authors:Pirjo Sainio  Irma Mäkinen  Jaap-Willem Hutter  Theo den Ouden  Mikael Krysell
Institution:(1) Finnish Environmental Institute (SYKE) Laboratory, Hakuninmaantie 6, 00430 Helsinki, Finland;(2) ALcontrol Specials, Steenhouwerstraat 15, 3194 AG Hoogvliet, The Netherlands;(3) EUROFINS A/S, Strandesplanaden 110, 2665 Vallensbæk Strand, Denmark
Abstract:The international joint project HYCREF (Contract No. G6RD-CT-2002-00854), funded by the European Commission in the 5th Framework programme, aimed to develop methods to prepare homogeneous and stable reference materials of water, soil, and waste contaminated with mineral oil hydrocarbons and to certify the mineral oil content by gas chromatographic methods. The results of a feasibility study for the preparation of three soil reference materials are discussed in this paper, and for the preparation of three waste reference materials in the second part (Koch et al., Accred Qual Assur submitted for publication). The soil materials were selected to represent different soil types and contamination levels. The project plan set three requirements for these reference materials: uncertainty in the mineral oil content resulting from the certification exercise <5%, a sample inhomogeneity of <3% and a minimum long-term stability of 5 years. For the most part, these requirements were met within this project.
Keywords:Mineral oil hydrocarbons  Soil  Gas chromatography  Certified reference materials
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