Evaluation of the laboratory comparison exercise for SO2, CO, O3, NO and NO2 : 13-16 June 2016, Ispra : European Commission harmonisation programme for air quality measurements

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 air pollutants (NO, NO2, SO2, CO and O3). On the basis of agreed criteria, 79.3% of the results reported by AQUILA laboratories were good both in terms of measured values and reported uncertainties. The rest of the results (21.1%) had good measured values, but the reported uncertainties were either too high (17.8%) or too small (2.9%).