AS 2365.1.1-1990

1 - AS 2365.1.1-1990 METHODS FOR THE SAMPLING AND ANALYSIS OF INDOOR AIR - DETERMINATION OF NITROGEN DIOXIDE - SPECTROPHOTOMETRIC
1 - PREFACE
1 - CONTENTS
1 - METHOD
1 - 1 SCOPE.
1 - 2 APPLICATION.
2 - 3 REFERENCED DOCUMENTS.
2 - 4 PRINCIPLE.
2 - 5 DEFINITION.
2 - 6 REAGENTS AND MATERIALS.
2 - 6.1 General requirements.
2 - 6.2 Sodium nitrite solution.
2 - 6.3 Triethanolamine solution.
2 - 6.4 Azo dye-forming reagent.
2 - 6.5 Standard dye solution.
2 - 6.6 Chromic acid.
2 - 7 APPARATUS.
2 - 7.1 Passive sampling tube
3 - 7.2 Spectrophotometer
3 - 8 PREPARATION OF PASSIVE SAMPLING TUBES.
3 - 9 SAMPLING.
3 - 10 PROCEDURE.
3 - 10.1 Calibration graph.
3 - 10.2 Determination.
4 - 11 CALCULATION AND EXPRESSION OF RESULTS.
4 - 12 PRECISION.
4 - 13 TEST REPORT.
5 - 14 BIBLIOGRAPHY.

Sets out a spectrophotometric method for the determination of nitrogen dioxide in indoor air using a passive tube technique. This method is applicable to indoor air in which the expected nitrogen dioxide concentration is within the range 0 to 30 ppm by volume (0 to 6000 µg/m(sup)3(/sup)) for an exposure time of 1 h, and has a detection limit of 0.06 ppm for a 4 h sampling period.

This Standard sets out a spectrophotometric method for the determination of nitrogen dioxide in indoor air using a passive tube sampling technique. This method is applicable to indoor air in which the expected nitrogen dioxide concentration is within the range 0 to 30 p.p.m. by volume (0 to 6 000 mg/m3) for an exposure time of 1 h, and has a detection limit of 0.06 p.p.m. for a 4 h sampling period.

First published as AS 2365.1.1-1990.