The Challenge of Developing Primary Standards Mixtures of Carbon Dioxide at Atmospheric Levels to Establish Traceability to GHG Monitoring Analysis
This article describes how in recent years the need for the quality control, reliability and traceability of analytical results has been strongly emphasised. The National Institute of Metrology, Quality and Technology, is involved in improving calibration and measurement capabilities to provide high confidence level in accordance with the latest regulation regarding greenhouse gases standards. This article describes the gravimetric production of certified gaseous reference materials of carbon dioxide in atmospheric synthetic air that are used to monitor its concentration in the atmosphere. Considering the contributions from gravimetry preparation and its verification analysis by cavity ringdown system (CRDS) the relative expanded uncertainty of the standard mixture of carbon dioxide was lower than 0.5% for the range studied from 370 to 550 μmol/mol, which is comparable to the average of 0,25% relative uncertainties presented on international standards mixtures.
Year of publication: |
2017
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Authors: | Fioravante, Andreia de Lima ; Augusto, Cristiane Rodrigues ; Smarçaro da Cunha, Valnei ; d'Avila, Luiz Antonio |
Published in: |
International Journal of Measurement Technologies and Instrumentation Engineering (IJMTIE). - IGI Global, ISSN 2156-1729, ZDB-ID 2703525-6. - Vol. 6.2017, 2 (01.07.), p. 1-15
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Publisher: |
IGI Global |
Subject: | Carbon Dioxide | Cavity Ringdown System | Certified Reference Material | Greenhouse Gases | Metrology | Primary Standard Gas Mixture |
Saved in:
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