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  • The certification of the mass fractions of As, Br, Cd, Cl, Cr, Hg, Pb, S and Sb and the assignment of indicative values for Sn and Zn in two polyethylene reference materials

Abstract

Certified Reference Materials ERM-EC680k and ERM-EC681k
This report describes the preparation and certification of the polymer certified reference materials (CRM) ERM-EC680k and ERM-EC681k. They replace the exhausted predecessors, ERM-EC680 and ERM-EC681. The CRMs have been certified by the European Commission, Directorate General Joint Research Centre, Institute for Reference Materials and Measurements (IRMM), Geel, Belgium.
The CRM was prepared from a low-density polyethylene (LDPE) granulate spiked with inorganic pigments (As2O3, Green 36, ZnS/CdS, Green 7, Cr2O3, PbCrO4/PbSO4, HgS, Sb2O3, SnO2).
Certification of the CRM included testing of the homogeneity and stability of the material as well as the characterisation using an intercomparison approach.
The new CRMs have been certified for their content of As, Br, Cd, Cl, Cr, Hg, Pb, S, Sb and indicative values have been established for Sn and Zn. Additional information about acid digestible Cr is given.
These CRMs are intended for use in quality assurance of measurements of elements in polymers and related matrices.
The following values were assigned:
Certified and indicative values. Assigned uncertainties are expanded uncertainties estimated in accordance with the Guide to the Expression of Uncertainty in Measurement (GUM) with a coverage factor k = 2.78 for Cr and k = 2 for all other elements, corresponding to a level of confidence of about 95 %.

Additional information

Authors: LINSINGER T, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);LIEBICH A, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);PRZYK E, 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)
Bibliographic Reference: EUR 22784 EN (2007), 71 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-info@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
ISBN: ISBN: 978-92-79-06027-4
Record Number: 200719521 / Last updated on: 2007-10-29
Category: PUBLICATION
Original language: en
Available languages: en
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