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HomeThe certification of the mass fraction of the total content and the aqua regia extractable content (ISO 12914 and ISO 11466) of As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn in sewage sludge, ERM®- CC144
Certification report
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This report describes the preparation and certification of ERM®-CC144, a sewage sludge material certified for total and aqua regia extractable content (ISO 12914 and ISO 11466) of As, Cd, Cr, Co, Cu, Fe, Hg, Mn, Ni, Pb and Zn. The material was produced by following ISO Guide 34: 2009. The whole certification process included checking of between unit-heterogeneity, stability during dispatch and best storage conditions which were assessed in accordance with ISO Guide 35:2006. Within-unit heterogeneity was also quantified to determine the minimum sample intake. The certified values were calculated through an inter-laboratory comparison study among laboratories of demonstrated competence and adhering to ISO/IEC 17025. Uncertainties of the certified values were calculated in compliance with the Guide to the Expression of Uncertainty in Measurement (GUM), by including uncertainties related to possible heterogeneity, instability and characterisation. ERM-CC144 is available in glass bottles containing ca. 30 g of dried sewage sludge powder. The minimum amount of sample to be used is 300 mg for total content of As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn and 30 mg for total content of Hg. The minimum amount of sample to be used for aqua regia extractable content is 500 mg if using ISO 12914:2012 and 3 g if using ISO 11466:1995 for all the certified elements. This material is intended for the quality control and assessment of method performance. As any reference material, it can also be used for control charts or validation studies. ERM-CC144 was accepted as European Reference Material (ERM®) after peer evaluation by the partners of the European Reference Materials consortium.
- Published:
- Corporate author(s): Institute for Reference Materials and Measurements (Joint Research Centre)
- Personal author(s): Held, Andrea ; Perez, Andres ; Venelinov, Toni ; Santoro, Anna ; Oostra, Albert
- Themes: Research policy and organisation
- Subject: analytical chemistry , chemical product , Community certification , organic chemical , research report , research results , sewage sludge , wastewater , water treatment
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| ISSN 1831-9424 | ISBN 978-92-79-59857-9 | DOI 10.2787/264881 | Catalogue number LA-NA-28012-EN-N |
- Released on EU publications website:
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