Title: The certification of the mass concentration of perfluoroalkyl substances (PFASs) in water: IRMM-428
Publisher: Publications Office of the European Union
Publication Year: 2015
JRC N°: JRC97503
ISBN: 978-92-79-51037-3
ISSN: 1831-9424
Other Identifiers: EUR 27430
OP LA-NA-27430-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC97503
DOI: 10.2787/736752
Type: EUR - Scientific and Technical Research Reports
Abstract: This report describes the production of IRMM-428, a water material certified for the mass fraction of perfluoroalkyl substances (PFASs). The material was produced following ISO Guide 34:2009. The starting material for the CRM is tap drinking water, collected in Nieuwegein, the Netherlands. The material was spiked with a mixture of PFASs, bottled and sterilised by gamma irradiation, before storage at -20 ºC . Between unit-homogeneity was quantified and stability during dispatch and storage were assessed in accordance with ISO Guide 35:2006. Within-unit homogeneity was quantified to determine the minimum sample intake. The material was characterised by an intercomparison among laboratories of demonstrated competence and in most cases adhering to ISO/IEC 17025. Technically invalid results were removed but no outlier was eliminated on statistical grounds only. Uncertainties of the certified values were calculated in compliance with the Guide to the Expression of Uncertainty in Measurement (GUM) and include uncertainties related to possible inhomogeneity, instability and characterisation. The 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. The CRM is available in high density polyethylene (HDPE) bottles containing 410 mL of water material. The minimum amount of sample to be used is 100 mL.
JRC Directorate:Health, Consumers and Reference Materials

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