Metrology for ammonia in ambient air – concept and first results of the EMRP project MetNH3

Pogány, Andrea; Balslev-Harder, David; Braban, Christine F.; Cassidy, Nathan; Ebert, Volker; Ferracci, Valerio; Hieta, Tuomas; Leuenberger, Daiana; Lüttschwager, Nils Olaf Bernd; Martin, Nicholas A.; Pascale, Céline; Tiebe, Carlo; Twigg, Marsailidh; Vaittinen, Olavi; Wijk, Janneke van; Wirtz, Klaus; Niederhauser, Bernhard

doi:10.1051/metrology/20150007003

Cited by 3 publications

(1 citation statement)

References 29 publications

(26 reference statements)

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“…Parts of this work have been presented at the International Congress of Metrology (CIM 2015, held between 21st and 25th September 2015 in Paris, France) [17].…”

Section: Introductionmentioning

confidence: 99%

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

Pogány

Balslev-Harder²,

Braban

et al. 2016

Meas. Sci. Technol.

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21Keywords 22 ammonia in ambient air, traceability, reference gas standards, optical transfer standard, validation and testing 23 infrastructure 24 Abstract 25The environmental impacts of ammonia (NH 3 ) in ambient air have become more evident in the recent decades, 26 leading to intensifying research in this field. A number of novel analytical techniques and monitoring 27 instruments have been developed, and the quality and availability of reference gas mixtures used for the 28 calibration of measuring instruments has also increased significantly. However, recent inter-comparison 29 measurements show significant discrepancies, indicating that the majority of the newly developed devices and 30 reference materials require further thorough validation. There is a clear need for more intensive metrological 31 research focusing on quality assurance, intercomparability and validations. MetNH3 (Metrology for ammonia in 32 ambient air) is a three-year project within the framework of the European Metrology Research Programme 33 (EMRP), which aims to bring metrological traceability to ambient ammonia measurements in the 0.5 -34 500 nmol/mol amount fraction range. This is addressed by working in three areas: 1) improving accuracy and 35 2 stability of static and dynamic reference gas mixtures, 2) developing an optical transfer standard and 3) 36 establishing the link between high-accuracy metrological standards and field measurements. In this article we 37 describe the concept, aims and first results of the project. 38

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“…Parts of this work have been presented at the International Congress of Metrology (CIM 2015, held between 21st and 25th September 2015 in Paris, France) [17].…”

Section: Introductionmentioning

confidence: 99%

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

Pogány

Balslev-Harder²,

Braban

et al. 2016

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

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Investigation of cylinder pre-treatments for the stability of ammonia gas reference materials

Meane

Brown²,

Brewer³

et al. 2022

Accred Qual Assur

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Characterization of Fourier Transform Infrared, Cavity Ring-Down Spectroscopy, and Optical Feedback Cavity-Enhanced Absorption Spectroscopy Instruments for the Analysis of Ammonia in Biogas and Biomethane

et al. 2022

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Novel traceable analytical methods and reference gas standards were developed for the detection of trace-level ammonia in biogas and biomethane. This work focused on an ammonia amount fraction at an upper limit level of 10 mg m −3 (corresponding to approximately 14 μmol mol −1 ) specified in EN 16723-1:2016. The application of spectroscopic analytical methods, such as Fourier transform infrared spectroscopy, cavity ring-down spectroscopy, and optical feedback cavity-enhanced absorption spectroscopy, was investigated. These techniques all exhibited the necessary ammonia sensitivity at the required 14 μmol mol −1 amount fraction. A 29-month stability study of reference gas mixtures of 10 μmol mol −1 ammonia in methane and synthetic biogas is also reported.

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Metrology for ammonia in ambient air – concept and first results of the EMRP project MetNH3

Cited by 3 publications

References 29 publications

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air

Investigation of cylinder pre-treatments for the stability of ammonia gas reference materials

Characterization of Fourier Transform Infrared, Cavity Ring-Down Spectroscopy, and Optical Feedback Cavity-Enhanced Absorption Spectroscopy Instruments for the Analysis of Ammonia in Biogas and Biomethane

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