ISO 10849:2022 PDF

Scope: This document specifies a method for the determination of nitrogen oxides (NOx) in flue gas of stationary sources and describes the fundamental structure and the key performance characteristics of automated measuring systems. The method allows continuous monitoring with permanently installed measuring systems of NOx emissions. This document describes extractive systems and in situ (non-extractive) systems in connection with a range of analysers that operate using, for example, the following principles: — chemiluminescence (CL); — infrared absorption (NDIR); — Fourier transform infrared (FTIR) spectroscopy; — ultraviolet absorption (NDUV); — differential optical absorption spectroscopy (DOAS); Other equivalent instrumental methods such as laser spectroscopic techniques can be used provided they meet the minimum performance requirements specified in this document. The measuring system can be validated with reference materials, in accordance with this document, or comparable methods. Automated measuring system (AMS) based on the principles listed above has been used successfully in this application for the measuring ranges as shown in Annex F.

ISO 10849:2022 Referenced Document

ISO 14956 Air quality - Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty
ISO 9169 Air quality - Definition and determination of performance characteristics of an automatic measuring system

2022 ISO 10849:2022 Stationary source emissions — Determination of the mass concentration of nitrogen oxides in flue gas — Performance characteristics of automated measuring systems
1996 ISO 10849:1996 Stationary source emissions - Determination of the mass concentration of nitrogen oxides - Performance characteristics of automated measuring systems