A Procedure For Correcting Readings In
Chemiluminescence Nitrogen Oxide Analyzers
Due To The Effect Of Sample Pressure
Author(s)
M. Doval, J. Barberá, E. González & F. J. Marzal
Abstract
The influence of sample pressure on chemiluminescence nitrogen oxides
analyzers is studied in this paper. Although both of the employed analyzers
comply with the requirements established in the standard EN 14211:2005 for this
performance feature, it is advisable to make corrections to ensure a better quality
of the data. The proposed procedure reduced to ± 1.5% the mistakes caused by
the effect of sample pressure.
Keywords: EN 14211:2005, nitrogen oxides, chemiluminiscence, pressure,
correction procedure.
1 Introduction
Networks measuring ambient air pollution within the Member States use, in
general, analyzers certified by the Environmental Protection Agency of the
United States as reference methods [2], although no European legislation in this
matter obliges the analyzers to meet any special requirements, except as regards
the analytical method employed.
In order to improve emission quality data, the European Commission has
elaborated the Proposal for a Directive on ambient air and cleaner air for Europe
[3], which will replace the Framework Directive 96/62/EC [4] currently in force.
The Proposal establishes new reference documents for the measurement of the
gaseous pollutants regulated in this field.
Nitrogen oxides (NO and NO2) receive special attention due to their effects
on humans and the environment and for being tropospheric ozone precursors.
The reference method for the measurement of these pollutants established in the
Keywords
EN 14211:2005, nitrogen oxides, chemiluminiscence, pressure,
correction procedure.
Related Book
Other papers in this volume
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