Comprehensive laboratory and field testing of cavity ring-down spectroscopy analyzers measuring H 2 O, CO 2 , CH 4 and CO
Year: 2015
Type: article
Abstract: . To develop an accurate measurement network of greenhouse gases, instruments in the field need to be stable and precise and thus require infrequent calibrations and a low consumption of consumables. For about 10 years, cavity ring-down spectroscopy (CRDS) analyzers have been available that meet these stringent requirements for precision and stability. Here, we present the results of tests of CRDS instruments in the laboratory (47 instruments) and in the field (15 instruments). The precision and stability of the measurements are studied. We demonstrate that, thanks to rigorous testing, newer models generally perform better than older models, especially in terms of reproducibility between instruments. In the field, we see the importance of individual diagnostics during the installation phase, and we show the value of calibration and target gases that assess the quality of the data. Finally, we formulate recommendations for use of these analyzers in the field.
Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, Laboratoire des Sciences du Climat et de l'Environnement, CEA Paris-Saclay, Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Santa Clara University, Picarro (United States), Laboratoire National de Métrologie et d'Essais
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,585
OpenAlex ID: W2016115889