Study on the use of oxidant scrubbers for elimination of interferences due to nitrogen dioxide in analysis of atmospheric dimethylsulfide
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Data
2000-01-01
Autores
Rodrigues, B. A.
Pitombo, LRM
Cardoso, A. A.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Soc Brasileira Quimica
Resumo
In this work, oxidant scrubbers were evaluated for their ability to prevent sampling losses of dimethylsulfide caused by reactions with nitrogen dioxide. Various compounds and mixtures were used in the preparation of the oxidant scrubbers. An automatic flow analysis device was used to compare scrubbing efficiency for nitrogen dioxide. Among the scrubbers tested, the best were shown to be the one made with filter paper or glass wool coated with iron (II) sulfate, sulfuric acid and pyrogallic acid, and the one made from with paper coated with triethanolamine. The results obtained under laboratory conditions, using dimethylsulfide standard gas, and in field experiments confirmed that these scrubbers are suitable for the prevention of oxidation during sampling.
Descrição
Palavras-chave
dimethylsulfide, atmospheric trace gases, sampling technique, nitrogen dioxide scavenger
Como citar
Journal Of The Brazilian Chemical Society. Sao Paulo: Soc Brasileira Quimica, v. 11, n. 1, p. 71-77, 2000.