BS EN ISO 21258:2010 Stationary source emissions. Determination of the mass concentration of dinitrogen monoxide (N2O). Reference method. Non-dispersive infrared method
BS EN ISO 21258 is an International Standard which specifies a method for sampling, sample conditioning and determination of dinitrogen monoxide (N2O) content in the flue gas emitted from ducts and stacks to atmosphere. It sets out the non-dispersive infrared (NDIR) analytical technique, including the sampling system and sample gas conditioning system.
BS EN ISO 21258 is a reference method for periodic monitoring and for calibration, adjustment or control of automatic monitoring systems permanently installed on a stack.
This reference method has been successfully tested on a sewage sludge incinerator where the N2O concentration in the flue gas was up to about 200 mg/m3.
Contents of BS EN ISO 21258:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principle
6 Description of the automated measuring equipment
6.1 General
6.2 Sampling line components
6.3 Analyser equipment
6.4 Responsibilities
7 Performance criteria and determination of the performance characteristics
7.1 Performance criteria
7.2 Determination of the performance characteristics and measurement uncertainty
7.3 Establishment of the uncertainty budget
8 Measurement procedure
8.1 Sampling location
8.2 Sampling point(s)
8.3 Choice of the measuring system
8.4 Setting of the analyser on site
9 Ongoing quality control
9.1 General
9.2 Frequency of checks
10 Evaluation of the method in the field
11 Expression of results
12 Test report
Annex A (informative) Schematic diagram of a typical analyser
Annex B (normative) Procedures for determination of the performance characteristics during the general performance test
Annex C (informative) Example of assessment of compliance of NDIR method for N2O with requirements on emission measurements
Annex D (informative) Results of comparison tests
Annex E (informative) Leak test procedures
Bibliography
