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STANDARD 2612
First edition
2023-12
Analysis of natural gas — Biomethane
— Determination of ammonia content
by tuneable diode laser absorption
spectroscopy
Analyse du gaz naturel — Biométhane — Détermination de la teneur
en ammoniac par spectroscopie d'absorption laser à diode accordable
Reference number
ISO 2612:2023(E)
© ISO 2023
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ISO 2612:2023(E)
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© ISO 2023
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Published in Switzerland
ii
© ISO 2023 – All rights reserved
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ISO 2612:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Safety precautions. 3
5 Principle . 3
6 Apparatus . 3
6.1 NH analyser . 3
3
6.2 Gas delivery system . 3
6.3 Temperature sensor . 4
6.4 Pressure sensor . 4
6.5 Calibration equipment . 4
6.5.1 General . 4
6.5.2 Pressure regulators for the NH cylinders . 4
3
6.5.3 Flow controller . 4
6.5.4 Flow meter . 4
6.5.5 Dilution device. 4
6.5.6 Output manifold .
...