# The Air Quality Limit Values (Scotland) Regulations 2001, Paragraph


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/ssi/2001/224/schedule/6/part/II/paragraph/wrapper19n1 (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-scotland-regulations-2001/schedule-6/part-II/paragraph-wrapper19n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.