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eLibrary > 23/30472312 DC BS EN 16339 Ambient air. Method for the determination of the concentration of nitrogen dioxide by diffusive sampling >

23/30472312 DC BS EN 16339 Ambient air. Method for the determination of the concentration of nitrogen dioxide by diffusive sampling, 2023

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23/30472312 DC BS EN 16339 Ambient air. Method for the determination of the concentration of nitrogen dioxide by diffusive sampling, 2023

30472312-NC.pdf
41_e_stf.pdf [Go to Page]
European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Description of samplers [Go to Page]
4.1 Principle
4.2 Diffusive samplers [Go to Page]
4.2.1 Description
4.2.2 Preparation
4.2.3 Storage and shelf-life of samplers
4.2.4 Storage after sampling
4.2.5 Chemical interferences
4.3 Protective devices [Go to Page]
4.3.1 General
4.3.2 Protective shelter
4.3.3 Protective filter
4.4 Instructions for use
5 Analysis [Go to Page]
5.1 General
5.2 Colorimetric method [Go to Page]
5.2.1 General
5.2.2 Calibration
5.2.3 Extraction
Table 1 — Extraction conditions and extract stabilities for analysis by colorimetry [Go to Page]
5.2.4 Analysis
5.3 Ion chromatography method [Go to Page]
5.3.1 General
5.3.2 Calibration
5.3.3 Extraction
Table 2 — Extraction conditions and extract stabilities for analysis by ion chromatography [Go to Page]
5.3.4 Analysis
6 Calculation of the concentration of nitrogen dioxide [Go to Page]
6.1 Diffusive sampling rate
6.2 Mass concentration
6.3 Conversion to standard conditions of temperature and pressure
7 Quality control/quality assurance
8 Measurement strategy [Go to Page]
8.1 Calibration of the diffusive sampling rate
8.2 Siting criteria
8.3 Use of replicates
8.4 Exposure
8.5 Co-location sites
8.6 Auxiliary information
9 Performance requirements and measurement uncertainty
10 Report
Annex A (normative) Description of tube-type samplers
A.1 Tube-type sampler with a cylindrical tube
A.1.1 Specifications of the sampler
Table A.1 — Specifications of the tube type sampler with a cylindrical tube
A.1.2 Description
A.1.3 Preparation
Figure A.3 — Tube type sampler with a cylindrical tube with shelter
A.2 Tube-type sampler with a slightly conical tube
A.2.1 Specifications of the sampler
Table A.2 — Specifications of the tube type sampler with a slightly conical tube
A.2.2 Description
Figure A.4 — Tube-type sampler with a slightly conical tube
Figure A.5 — Protective filter (glass frit)
Figure A.6 — Protective shelter for NO2 sampler
A.2.3 Preparation
A.2.4 Extraction and analysis
Annex B (informative) Description of other samplers
B.1 Radial sampler
B.1.1 Specifications of the sampler
Table B.1 — Specifications of the radial sampler
B.1.2 Description
Figure B.1 — Radial sampler design
Figure B.2 — Radial sampler supporting plate
Figure B.3 — Radial sampler shelter
B.1.3 Preparation
B.1.4 Extraction and analysis
B.2 Badge-type sampler
B.2.1 Specifications of the sampler
Table B.2 — Specifications of the badge-type sampler
Figure B.5 — Badge-type sampler installed using a protective shelter
B.2.2 Description
B.2.3 Preparation
B.2.4 Analytical method
Annex C (informative) Estimation of the diffusive sampling rate of the samplers
C.1 General
C.2 Theoretical calculation
Table C.1 — Diffusive sampling rates calculated using Fick’s first law of diffusion
C.3 Experimental approach
C.3.1 Field approach
Table C.2 — Experimental diffusive sampling rate by determination with the chemiluminescence method
C.3.2 Laboratory approach
Annex D (informative) Measurement uncertainty
D.1 Direct approach
D.1.1 General
Figure D.1 — 14 day exposure diffusion tube results from 24 sites in 2018
D.2 GUM approach
D.2.1 Measurement formula
D.2.2 Combined standard uncertainty
D.2.3 Expanded relative uncertainty
D.2.4 Uncertainty contributions
D.2.4.1 Diffusive sampling rate
D.2.4.2 Mass of nitrite in sample
D.2.4.2.1 General
D.2.4.2.2 Mass of nitrite in calibration standards
D.2.4.2.3 Lack of fit of the calibration function
D.2.4.2.4 Analytical repeatability
D.2.4.2.5 Response drift between calibrations
D.2.4.3 Mass of nitrite in blank
D.2.4.4 Exposure time
D.2.4.5 Average temperature and pressure during exposure
D.2.4.6 Worked example
Table D.3 — Uncertainty budget
D.2.4.7 Between-laboratory uncertainty
Annex E (informative) Reagents and equipment
E.1 Introduction
E.2 Reagents
E.2.1 Ultrapure water
E.2.2 Sodium nitrite
E.2.3 Orthophosphoric acid (PA)
E.2.4 Sulphanilamide (SA)
E.2.5 Sulphanilic acid (Sac)
E.2.6 N-(naphthyl-1) ethylene diamine dihydrochloride (NEDD)
E.2.7 Colorimetric reagent
E.2.8 Sodium carbonate
E.2.9 Sodium bicarbonate
E.2.10 Eluent for ion chromatography
E.3 Equipment
E.3.1 Colorimeter
E.3.2 Ion chromatograph
E.3.3 Sample shaker
E.3.4 Oven
E.3.5 Balance
E.3.6 Desiccator
Annex F (informative) Validation data of the use of protective devices
Figure F.1 — Photograph showing diffusion tubes being deployed at NERC supersite in Manchester
Table F.1 — Summary of NO2 tube measurement results
Annex G (informative) Significant technical changes
Bibliography [Go to Page]

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23/30472312 DC BS EN 16339 Ambient air. Method for the determination of the concentration of nitrogen dioxide by diffusive sampling, 2023

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