Title: IMEP-18 Sulphur in Diesel Fuel (Gasoil) - Report to Participants
Publication Year: 2005
JRC N°: JRC30716
Other Identifiers: EUR 21765 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC30716
Type: EUR - Scientific and Technical Research Reports
Abstract: The International Measurement Evaluation Programme (IMEP®) is an Interlaboratory Comparison scheme in support of EU policies (e.g. Consumer Protection and Public Health, Single Market, Environment, Research and Technology, External Trade and Economic Policy). It is founded, owned and co-ordinated by the IRMM, the European Commission¿s Joint Research Centre for Reference Materials and Measurements. The aim of this interlaboratory comparison programme is to picture objectively the degree of equivalence and the quality of chemical measurements. Contrary to most other external quality assessment schemes, participating laboratories in IMEP® can compare their measurement results and uncertainty statements with external certified reference values, obtained completely independent from the participants¿ result. These reference values are required to demonstrate traceability and they should have a demonstrated and adequately small uncertainty, as evaluated according to international guidelines. Participants in IMEP® use their routine analytical procedures to measure the IMEP-certified test sample (CTS). Therefore they can assess the quality of their results on an international forum by comparing their values to the IMEP-reference values. In order to meet the new EU air quality standards, car manufacturers are developing a new generation of engines. However S in fuels can impair the effectiveness of existing and emerging automotive technology (S acts as a catalyst poison). The recent published Directive 2003/17/EC intends to reduce the sulphur levels in fuels and states that in 2005 fuels with maximum sulphur amount contents of 50 and 10 mg¿kg-1 need to be available on the market in the Member States. This report describes the interlaboratory comparison IMEP-18 that allows laboratories to measure a diesel material with a S certified amount content of 42.2 (1.3) mg¿kg-1. The reference value was established by Isotope Dilution Mass Spectrometry and is the result of the BIPM/CCQM key comparison K-35 co-ordinated by NIST to which 4 national metrology institutes participated. In this way, national metrology measurement capability supports measurement capabilities of field laboratories. Measurement results were reported by 141 of the 154 registered laboratories. Customs laboratories were contacted via DG TAXUD and nominated accredited laboratories resulted from the IRMM-European Accreditation collaboration. Besides laboratories from Member States also laboratories from Acceding and Western Balkan countries participated (IRMM¿s CARDS support). This report presents in a graphical form the results of all participants together with the reference value. The results are graphed and sorted according to different criteria based on the replies from the questionnaire.
JRC Directorate:Health, Consumers and Reference Materials

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