The equivalence of diffusive samplers to reference methods for monitoring O3, benzene and NO2 in ambient air

Journal of Environmental Monitoring : JEM
Daniela BuzicaH Plaisance

Abstract

A study of the equivalence to the reference methods of the Radiello samplers for ozone (O(3)) and benzene as well as the membrane-closed Palmes tube (MCPT) for nitrogen dioxide (NO(2)) is presented. These samplers benefit from new model equations capable of estimating their uptake rate. For O(3), the aim here was to demonstrate the equivalence for the reference period of 8 h and 120 microg m(-3), the target value of the 3rd European Daughter Directive. For benzene, the demonstration of equivalence to the annual limit value of 5 microg m(-3) of the 2nd European Daughter Directive was examined. In the case of NO(2), the equivalence to the annual limit value of the 1st European Daughter Directive (40 microg m(-3)) was considered. Results show that the radial sampler for O(3) fails to meet the Data Quality Objective (DQO) for continuous monitoring. However, with an expanded uncertainty of less than 30%, the O(3) diffusive sampler fulfils the DQO for indicative measurements. For benzene, the Radiello sampler exposed for 7 days gave satisfying results showing the ability of the sampler to meet the DQO of the reference method. Nevertheless, the field tests should be complemented by measurements for a wider range of benzene concentrati...Continue Reading

Citations

Feb 9, 2012·Environmental Monitoring and Assessment·Marta Doval MiñarroAgustín Miñana Aznar
Aug 31, 2011·Journal of the Air & Waste Management Association·Eben D ThomaBrenda C Shine
Apr 25, 2012·The Science of the Total Environment·Joseph G AllenJohn F McCarthy

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