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03/312903 DC : DRAFT SEP 2003

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

EN 14792 - STATIONARY SOURCE EMISSIONS - DETERMINATION OF MASS CONCENTRATION OF NITROGEN OXIDES (NO[X]) - REFERENCE METHOD: CHEMILUMINESCENCE
Superseded date

01-04-2006

Published date

11-23-2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
    4.1 General
    4.2 Measuring principle
5 Description of measuring equipment - Sampling and
    sample gas conditioning systems
    5.1 General
    5.2 Sampling line components
         5.2.1 Sampling probe
         5.2.2 Filter
         5.2.3 Sampling line
         5.2.4 Sample cooler (configuration 1)
         5.2.5 Permeation drier (configuration 2)
         5.2.6 Dilution system (configuration 3)
         5.2.7 Heated line and heated analyser
                (configuration 4)
         5.2.8 Sample pump
         5.2.9 Secondary filter
         5.2.10 Flow controller and flow meter
6 Analyser equipment
    6.1 General
    6.2 Converter
    6.3 Ozone generator
    6.4 Reaction chamber
    6.5 Optical filter
    6.6 Photomultiplier tube
    6.7 Ozone removal device
    6.8 Reagents
         6.8.1 Oxygen
         6.8.2 Zero gas
         6.8.3 Span gases
7 Determination of the characteristics of the method:
    analyser, sampling and conditioning line
    7.1 Introduction
    7.2 Relevant performance characteristics of the
         method and performance criteria
    7.3 Establishment of the uncertainty budget
8 Field operation
    8.1 Sampling location
    8.2 Sampling point
    8.3 Choice of the suitable instrument and sampling
         line
    8.4 Setting of the analyser on site
         8.4.1 Preliminary zero and span check, and
                adjustments
         8.4.2 Zero and span checks after measurement
9 Ongoing quality control
    9.1 Introduction
    9.2 Frequency of checks
10 Expression of results
11 Evaluation of the method in the field
    11.1 General
    11.2 Repeatability and reproducibility in the field
    11.3 Experimental data
    11.4 Equivalency with an alternative method
12 Test report
Annex A (informative) Schematic diagrams of typical
                      analysers
Annex B (normative) Determination of converter efficiency
    B.1 First method: cylinder gases for calibration
    B.2 Second method: gaseous phase titration
Annex C (informative) Examples of different types of
                      converters
    C.1 Quartz converter
    C.2 Low temperature converter (molybdenum)
    C.3 Stainless steel converter
Annex D (informative) Procedures for determination of the
                      performance characteristics during
                      the laboratory test
    D.1 General test conditions
    D.2 Procedures
         D.2.1 Response time
         D.2.2 Detection limit
         D.2.3 Lack of fit
         D.2.4 Zero drift and span drift
         D.2.5 Sensitivity to influence quantities
         D.2.6 Sensitivity to interferents
         D.2.7 Repeatability at zero and at span level
         D.2.8 Correction to dry basis
         D.2.9 Correction to O[2] reference concentration
Annex E (informative) Example of assessment of compliance
                      of chemiluminescence method for NOx
                      with requirements on emission
                      measurements
    E.1 Specific conditions in the site
    E.2 Performance characteristics of the method
    E.3 Calculation of standard uncertainty of
         concentration values given by the analyser
         E.3.1 Model equation and application of rule of
                uncertainty propagation
         E.3.2 Results of uncertainty calculation
    E.4 Conversion in mg/m[3](n)
    E.5 Evaluation of the compliance with the required
         measurement quality
Annex F (informative) Evaluation of the method in the field
    F.1 Characteristics of installations
    F.2 Overview results
Annex G (informative) Leak test procedures
    G.1 Method A
    G.2 Method B
Annex H (informative) Relationship with EU Directives
Bibliography

EN 14792.

Committee
EH/2/1
DocumentType
Draft
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

Standards Relationship
PREN 14792 : DRAFT 2014 Identical

ISO 14956:2002 Air quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty
ISO 11095:1996 Linear calibration using reference materials
PREN 14181 : DRAFT 2012 STATIONARY SOURCE EMISSIONS - QUALITY ASSURANCE OF AUTOMATED MEASURING SYSTEMS
EN 13284-1:2017 Stationary source emissions - Determination of low range mass concentration of dust - Part 1: Manual gravimetric method
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ENV 13005 : DRAFT 1999 GUIDE TO THE EXPRESSION OF UNCERTAINTY IN MEASUREMENT
ISO 9169:2006 Air quality Definition and determination of performance characteristics of an automatic measuring system

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