ISO INTERNATIONAL STANDARD 19702 Second edition 2015-08-01 Guidance for sampling and analysis of toxic gases and vapours in fire effluents using Fourier Transform Infrared(FTIR)spectroscopy Lignes directrices pour I'analyse des gaz et des vapeur dans les effluents du feu par spectroscopie infrarouge a transforee de Fourier(IRTF) Reference number ISO 19702:2015(E) CISO 2015 ISO 19702:2015(E) COPYRIGHT PROTECTED DOCUMENT ISO 2015,Published in Switzerland All rights reserved.Unlessotherwise specified,no part of this publication may be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting on the internet or an intranet,without prior the requester: ISO copyright office Ch.de Blandonnet8-CP 401 CH-1214 Vernier,Geneva,Switzerland Tel.+41227490111 Fax+41227490947 [email protected] www.iso.org ii OISO2015-All rightsreserved ISO 19702:2015(E) Contents Page Foreword V Introduction Scope.. 1 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 Muiti hole probes . 5.4.4 Probe positioning 5.5 Sampling line.... 5.6 Pump selection .position ,and flow rate 5.7 Response time ofthe sampling system 5.8 Optical cell The I FTIRspectrophotometer 6 6.1 Spectrophotometer environmen 6.2 Detector 6.3 IR-source 6.4 Mirroralignmentandcleanlines 6.5 Spectrophotometer compartment 12 6.6 Spectral range limits 12 6.7 12 7 Calibration ... 12 7.1 Background noise 7.2 Limits of detection and of quantification (Lpand LQ) 12 7.3 Calibration methods 13 7.4 Acquiring and collecting calibration standards 13 8 Measurement procedure 3 8.1 General 13 8.2 Daily checks and control 13 8.2.1 Genera 13 8.2.2 Control of calibration method 13 8.2.3 Spectrophotometer sensitivity measurements 14 8.2.4 Sampling system tests 14 8.2.5 Control of the sampling flow rate.. 14 8.3 Preparation for sampling and analysis ... 15 8.4 Initial procedures immediately before ates 15 8.5 Procedures during sampling from a tes..... 15 8.6 Procedures after atest 16 8.7 Data reduction 16 9 Test repor 16 10 Precision and accuracy 17 10.1 Genera 17 10.2 Lpand LQ. 10.3 Repeatability and reproducibility 17 ..+..+..+..++..+.+..++. CISO 2015-All rights reserved ili 19702:2015(E) ISO AnnexA(informative)FTIRtheory .18 Annex B (informative)FTIR sampling systems ...20 Annex C(informative) Analysis of filter (s), the sampling line and probe for effluent retention ....25 Annex D (normative) Response time determinationof the complete FTIR sampling system....26 AnnexE(informative)ConsiderationsforFTIRoptical cell selection .29 AnnexF(normative)Verification ofFTIRoptical cellperformance Annex G(informative)Spectrophotometer 33 AnnexH(normative）Verificationof spectrometerperformance AnnexI (informative)Reference gases .41 AnnexJ(informative)Calibrationmethods Annex K (informative)Recording referencespectra and building a calibration ..50 Annex L (informative) Repeatability and reproducibility AnnexM(informative)Examplesofequipmentandparameters Bibliography .66 iv C ISO 2015-All rights reserved ISO19702:2015(E) Foreword ISO(the International Organization for Standardization)is a worldwide federation of national standards bodies (ISO member bodies).The work of preparing International Standards is normally carried out through IsO technical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.International organizations,governmental and non-governmental,in liaison with IsO,also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC)on all matters of electrotechnicalstandardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,Part 1.In particular the different approval c