The reference-matrix concept applied to chemical testing of soils

Abstract We give examples of the application of the concepts and the philosophy of reference matrices, which were developed within the IUPAC Project on reference soils. These reference matrices are intended for assessing extrinsic properties of chemicals. We show how reference matrices, together with well-established reference substances, form a harmonized testing system. This allows laboratory findings to be extrapolated, via the use of appropriate models, to real processes defining the pathways and the fate of environmental chemicals. Well-defined reference matrices increase environmental realism in chemical-risk assessment. Given increasing globalization and implementation of new legislation, most notably in Europe [new chemical regulation (REACH), the Water Framework Directive and the newly established Soil Framework Directive], there is even greater need for well-defined reference matrices. There is also a parallel need to test the environmental fate and the effects of chemicals and of new materials (e.g., artificial nanoparticles). We therefore foresee that, apart from terrestrial reference matrices, guidance on additional reference matrices (e.g., sediment and even biological materials) is an issue for further research. We outline suitable guidelines for selecting such matrices. However, we note that agreement on the optimal application of reference matrices and the interpretation of the results obtained in tests using reference materials needs to be reached between scientists, risk assessors, reference laboratories and international standardization organizations.

[1]  S. Trapp Plant uptake and transport models for neutral and ionic chemicals , 2004, Environmental science and pollution research international.

[2]  H Muntau,et al.  EUROSOILS – A set of CRMs for comparability of soil-measurements , 2001, Fresenius' journal of analytical chemistry.

[3]  K Hund-Rinke,et al.  Underlying issues in bioaccessibility and bioavailability: experimental methods. , 2003, Ecotoxicology and environmental safety.

[4]  W. Peijnenburg,et al.  Monitoring approaches to assess bioaccessibility and bioavailability of metals: matrix issues. , 2003, Ecotoxicology and environmental safety.

[5]  W J Peijnenburg,et al.  A conceptual framework for implementation of bioavailability of metals for environmental management purposes. , 1997, Ecotoxicology and environmental safety.

[6]  H Muntau,et al.  Certification of the European reference soil set (IRMM-443--EUROSOILS). Part I. Adsorption coefficients for atrazine, 2,4-D and lindane. , 2003, The Science of the total environment.

[7]  H Muntau,et al.  Certification of the European Reference Soil Set (IRMM-443--EUROSOILS). Part II. Soil-pH in suspensions of water and CaCl2. , 2003, The Science of the total environment.

[8]  Joseph J Pignatello,et al.  Indices for bioavailability and biotransformation potential of contaminants in soils. , 2004, Environmental toxicology and chemistry.

[9]  Willie J.G.M. Peijnenburg,et al.  Metal-specific interactions at the interface of chemistry and biology , 2007 .