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  • Measurements of ozone precursor Volatile Organic Compounds (VOCs), proceedings of the international expert meeting, Casa Don Guanella, Barza d'Ispra, 6th and 7th March 2003, organised by the emissions and health unit


The introduction of at least 32 new components to be monitored in ambient air is a major extension of the Council Directive 96/62/Econ ambient air quality assessment and management, which significantly complicates the tasks of air quality laboratories in Member States.

In order to initiate the process laid down in the new Ozone Directive and to assist Member States in fulfilling their obligations on informing the European Commission of the methods it uses to sample and measure VOC, the EC Directorate for Environment has requested The EC Joint Research Centre to organise an expert meeting/ workshop. The specific objectives of this workshop were to form an overview of the state-of-the-art of VOC analysis in the present and new EU Member States, to investigate the potential for defining reference methods for precursor sampling and to discuss the basis for and organisation of intercomparison exercises.

Moreover, at the workshop the occasion was taken to conduct a discussion between experts in VOC analysis and possible measurement strategies. It is stated in the new Ozone Directive that "Measurements should be taken in particular in urban and suburban areas at any monitoring site set up in accordance with the requirements of Directive 96/62/EC and considered appropriate with regard to the above monitoring objectives". Ant choice of measurement strategy for VOCs is evidently linked with a proper measurement technique. Long term monitoring may best be carried out with a sampling technique integrating over time, whereas short term ad hoc measurement campaigns may better be carried out with techniques that allow for high temporal resolution. The EC Directorate for Environment has recently issued a document called "Guidance document for the implementation of the new Ozone Directive".

The results and conclusions of the presentations and discussions of the workshop are summarised in the chapters of part 1 of the report. The material brought to the workshop by the indi

Additional information

Authors: LARSEN B R (EDITOR), European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: EUR 21056 EN (2004), various paging. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
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