# The Air Quality Limit Values Regulations (Northern Ireland) 2002, Part II: REFERENCE METHOD FOR THE ANALYSIS OF NITROGEN DIOXIDE AND OXIDES OF NITROGEN

Extent: N.I.

ISO 7996: 1985 Ambient air—determination of the mass concentrations of nitrogen oxides—chemiluminescence method.

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Source: https://www.legislation.gov.uk/nisr/2002/94/schedule/6/part/II (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-6/part-II
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.