The Air Quality Standards (Scotland) Regulations 2007

PART 1 Group A pollutants

	Reference method
Sampling and measurement of benzene	EN 14662:2005, Parts 1, 2 and 3 “Ambient air quality – standard method for measurement of benzene concentrations”(1)
Analysis of carbon monoxide	EN 14626:2005 “Ambient air quality – Standard method for the measurement of the concentration of carbon monoxide by nondispersive infrared spectroscopy”
Sampling of lead	The same reference method as for PM10
Analysis of lead	ISO 9855: 1993 Ambient air – Determination of the particulate lead content of aerosols collected in filters. Atomic absorption spectroscopy method
Analysis of nitrogen dioxide and oxides of nitrogen	ISO 7996: 1985 Ambient air – determination of the mass concentrations of nitrogen oxides – chemiluminescence method
Sampling and measurement of PM10	EN 12341:1998 “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
Analysis of sulphur dioxide	ISO/FDIS 10498 (Standard in draft) Ambient air – determination of sulphur dioxide – ultraviolet fluorescence method

(1)

This standard is issued by the European Committee for Standardisation (CEN); (copies may be obtained from CEN at 36, Rue Stassart B-1050, Brussels, Belgium, http://www.cenorm.be).