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Reference
Methods

1:

Reference method for the analysis of sulphur dioxide:
Ambient air - determination of sulphur dioxide - ultraviolet fluorescence method. ISO/FDIS 10498
A Member State may use any other method, which it can demonstrate, gives results equivalent to the above method.

2:

Reference method for the analysis of nitrogen dioxide and oxides of nitrogen:
Ambient air - determination of the mass concentrations of nitrogen oxides - chemiluminescence method. ISO 7996: 1985

3:

Reference method for the sampling and measurement of PM10
The reference method for the sampling and measurement of PM10 will be that described in EN 12341 "Air Quality - Field Test Procedure to Demonstrate Reference Equivalence of Sampling Methods for the PM10 fraction of particulate matter".
The measurement principle is based on the collection on a filter of the PM10 fraction of ambient particulate matter and the gravimetric mass determination. One accepted method for PM10 sampling is using the German "Kleinfilter gerat", another is the Anderson high volume sampler with hood.

Every PM10 sampler obtained for air quality monitoring should be equivalent to those approved according to CEN standard EN12341. This standard formulates criteria of the equivalence. Other certifications, including USEPA approvals, do not necessarily constitute compliance with CEN standard EN12341.

If monitors are to be used for PERSONAL measurements the new Eberline beta gauge monitor could be applied, even if this is still not a completely accepted method.

4:

Reference method for the sampling and analyses of lead:
For sampling of lead use the reference method specified for sampling of PM10 .A Member State may use any other method, which it can demonstrate, gives results equivalent to the above method.
For the analysis of lead, use ISO 9855: 1993 "Ambient air - Determination of the particulate lead content of aerosols collected in filters". Analyses to be performed with atomic absorption spectroscopy method.

5:

Provisional reference method for the sampling and measurement of PM2,5
The Commission will produce guidelines, in consultation with the committee referred to in Article 12 of Directive 96/62/EEC, for an appropriate provisional reference method for the sampling and assessment of PM2.5 by 19 July 2001.
The dual head sampler PM10/PM2.5 has not been accepted a reference method.

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Last updated 24.09.01

© 2001 Norwegian Institute for Air Research (NILU). All rights reserved.