Title: Evaluation of the Laboratory Comparison Exercise for SO2, CO, O3, NO and NO2, 19th-22nd of May 2014 Ispra
Publisher: Publications Office of the European Union
Publication Year: 2015
JRC N°: JRC95071
ISBN: 978-92-79-47482-8
ISSN: 1831-9424
Other Identifiers: EUR 27199
OP LB-NA-27199-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC95071
DOI: 10.2788/352088
Type: EUR - Scientific and Technical Research Reports
Abstract: Within the harmonization program of Air Quality monitoring in Europe the ERLAP Laboratory is organizing Inter-Laboratory Comparison in its facility of Ispra (Italy). From the 19th to the 22nd of May 2014 eight laboratories of AQUILA (Network of European Air Quality Reference Laboratories) met for a laboratory comparison exercise in Ispra (IT) to evaluate their proficiency in the analysis of inorganic gaseous pollutants (SO2, CO, NO, NO2 and O3) covered by the European Air Quality Directive 2008/50/EC. The proficiency evaluation, where each participant’s bias was compared to two criteria, provides information on compliance with Data Quality Objectives and measurement capabilities of the National Air Quality Laboratories to the European Commission and can be used by participants in their laboratory’s quality system. On the basis of criteria imposed by the European Directive, 81.8% of the results reported by AQUILA laboratories were good both in terms of measured values and reported uncertainties. Some results (16.6%) had good measured values, but the reported uncertainties were either too high (15.5%) or too small (1.1%). The majority of the values were satisfactory (98.1%), 0.7% were questionable and 1.1% was found unsatisfactory for the z’-score. Only 2.7% of the values were found “not ok” regarding the En-number. Three values for ozone were unsatisfactory for both z’-score and En-number. The comparability of results among AQUILA participants at the highest generated concentration levels is satisfactory for measurements of all pollutants beside ozone.
JRC Directorate:Sustainable Resources

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