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The Challenge of Developing Primary Standards Mixtures of Carbon Dioxide at Atmospheric Levels: Establishing Traceability to Ghg Monitoring Analysis
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Author(s): Andreia de Lima Fioravante (National Institute of Metrology Standardization and Industrial Quality, Brazil), Cristiane Rodrigues Augusto (National Institute of Metrology Standardization and Industrial Quality, Brazil), Claudia Cipriano Ribeiro (National Institute of Metrology Standardization and Industrial Quality, Brazil), Valnei Smarçaro da Cunha (National Institute of Metrology Standardization and Industrial Quality, Brazil), Luiz Antônio d'Avila (Universidade Federal do Rio de Janeiro, Brazil)and Thays Silva Ximenes (National Institute of Metrology Standardization and Industrial Quality, Brazil)
Copyright: 2019
Pages: 26
Source title:
Strategic Applications of Measurement Technologies and Instrumentation
Source Author(s)/Editor(s): Soubantika Palchoudhury (University of Tennessee at Chattanooga, USA)
DOI: 10.4018/978-1-5225-5406-6.ch008
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Abstract
In recent years, the need for the quality control, reliability, and traceability of analytical results has been strongly emphasized. The National Metrology Institute – Inmetro is involved in improving measurement capabilities to provide confidence level regarding greenhouse gases standards. The chapter describes the development of certified 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 spectroscopy (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.
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