Stationary source emissions. Determination of the mass concentration of dinitrogen monoxide (N2O). Reference method. Non-dispersive infrared method

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