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  • The certification of two reference materials for the mass fraction of Solvent Yellow 124 in gas oil (Euromarker), Certified Reference Materials, ERM-EF317 and ERM-EF318, Certification Report

Abstract

Solutions of Solvent Yellow 124 (SY124) with mass fractions of 0.14 mg/kg (ERM-EF317) and 7.0 mg/kg (ERM-EF318) were prepared gravimetrically at IRMM. A total of 1401 ampoules of ERM-EF317 and 1298 units of ERM-EF318 were prepared. The two materials were tested for homogeneity and heterogeneity was found negligible. Dispatch conditions were tested in a short-term stability study and neither freezing nor exposure to 60 Degrees Celsius for four weeks were found to alter the materials, thus making dispatch at ambient temperature possible. Stability during storage was evaluated using data from a test batch and uncertainties of stability for storage of 24 months were found 6 % (ERM-EF317) and 2 % (ERM-EF318), respectively. Purity of the SY124 used to prepare the solutions was determined using nuclear magnetic resonance, thermogravimetric analysis, Karl Fischer titration, gas-chromatography coupled to flame ionisation and mass spectrometric detectors as well as high performance liquid chromatography, and was found to be 97.1 ± 0.8 %.
Based on these results, the following certified values were assigned: ERM-EF317: 0.141 ± 0.018 mg/kg ERM-EF318: 7.0 ± 0.4 mg/kg These values correspond to (indicative) mass concentrations of 0.117 ± 0.015 and 5.84 ± 0.28 mg/L.

Additional information

Authors: LINSINGER T, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);EMTEBORG H, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);ROEBBEN G, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);KRAMER G, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);LAMBERTY A, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);KOOMEN G, Dutch Customs Laboratory, Amsterdam (NL)
Bibliographic Reference: EUR 21566 EN (2005), 23 pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: jrc-publications-office@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
ISBN: ISBN: 92-894-6734-7
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