ISO 19702:2015
Guidance for sampling and analysis of toxic gases and vapours in fire effluents using Fourier Transform Infrared (FTIR) spectroscopy
ISO 19702:2015 specifies requirements and makes recommendations for sampling systems for use in small and large-scale fire tests, for the selection of parameters and use of the FTIR instrument itself and for collection and use of calibration spectra.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Sampling
5.1 General
5.2 Temperature of the sampling system
5.3 Filter systems
5.4 Sampling probes
5.4.1 General
5.4.2 Single hole probes
5.4.3 Multi hole probes
5.4.4 Probe positioning
5.5 Sampling line
5.6 Pump selection, position, and flow rate
5.7 Response time of the sampling system
5.8 Optical cell
6 The FTIR spectrophotometer
6.1 Spectrophotometer environment
6.2 Detector
6.3 IR-source
6.4 Mirror alignment and cleanliness
6.5 Spectrophotometer compartment
6.6 Spectral range limits
6.7 Resolution
7 Calibration
7.1 Background noise
7.2 Limits of detection and of quantification (LD and LQ)
7.3 Calibration methods
7.4 Acquiring and collecting calibration standards
8 Measurement procedure
8.1 General
8.2 Daily checks and controls
8.2.1 General
8.2.2 Control of calibration method
8.2.3 Spectrophotometer sensitivity measurements
8.2.4 Sampling system tests
8.2.5 Control of the sampling flow rate
8.3 Preparation for sampling and analysis
8.4 Initial procedures immediately before a test
8.5 Procedures during sampling from a test
8.6 Procedures after a test
8.7 Data reduction
9 Test report
10 Precision and accuracy
10.1 General
10.2 LD and LQ
10.3 Repeatability and reproducibility
Annex A (informative) FTIR theory
Annex B (informative) FTIR sampling systems
Annex C (informative) Analysis of filter(s), the sampling line and probe for effluent retention
Annex D (normative) Response time determination of the complete FTIR sampling system
Annex E (informative) Considerations for FTIR optical cell selection
Annex F (normative) Verification of FTIR optical cell performance
Annex G (informative) Spectrophotometer
Annex H (normative) Verification of spectrometer performance
Annex I (informative) Reference gases
Annex J (informative) Calibration methods
Annex K (informative) Recording reference spectra and building a calibration set
Annex L (informative) Repeatability and reproducibility
Annex M (informative) Examples of equipment and parameters
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Sampling
5.1 General
5.2 Temperature of the sampling system
5.3 Filter systems
5.4 Sampling probes
5.4.1 General
5.4.2 Single hole probes
5.4.3 Multi hole probes
5.4.4 Probe positioning
5.5 Sampling line
5.6 Pump selection, position, and flow rate
5.7 Response time of the sampling system
5.8 Optical cell
6 The FTIR spectrophotometer
6.1 Spectrophotometer environment
6.2 Detector
6.3 IR-source
6.4 Mirror alignment and cleanliness
6.5 Spectrophotometer compartment
6.6 Spectral range limits
6.7 Resolution
7 Calibration
7.1 Background noise
7.2 Limits of detection and of quantification (LD and LQ)
7.3 Calibration methods
7.4 Acquiring and collecting calibration standards
8 Measurement procedure
8.1 General
8.2 Daily checks and controls
8.2.1 General
8.2.2 Control of calibration method
8.2.3 Spectrophotometer sensitivity measurements
8.2.4 Sampling system tests
8.2.5 Control of the sampling flow rate
8.3 Preparation for sampling and analysis
8.4 Initial procedures immediately before a test
8.5 Procedures during sampling from a test
8.6 Procedures after a test
8.7 Data reduction
9 Test report
10 Precision and accuracy
10.1 General
10.2 LD and LQ
10.3 Repeatability and reproducibility
Annex A (informative) FTIR theory
Annex B (informative) FTIR sampling systems
Annex C (informative) Analysis of filter(s), the sampling line and probe for effluent retention
Annex D (normative) Response time determination of the complete FTIR sampling system
Annex E (informative) Considerations for FTIR optical cell selection
Annex F (normative) Verification of FTIR optical cell performance
Annex G (informative) Spectrophotometer
Annex H (normative) Verification of spectrometer performance
Annex I (informative) Reference gases
Annex J (informative) Calibration methods
Annex K (informative) Recording reference spectra and building a calibration set
Annex L (informative) Repeatability and reproducibility
Annex M (informative) Examples of equipment and parameters
Bibliography