Sublimation sources for nitrous acid and other nitrogen compounds in air

Autor:	Robert S. Braman, M. A. De La Cantera
Rok vydání:	1986
Předmět:	chemistry.chemical_compound Nitrous acid chemistry Nitric acid Inorganic chemistry Oxalic acid chemistry.chemical_element Nitrogen dioxide Potassium nitrate Sodium nitrite Nitrogen Analytical Chemistry Nitric oxide
Zdroj:	Analytical Chemistry. 58:1533-1537
ISSN:	1520-6882 0003-2700
DOI:	10.1021/ac00298a059
Popis:	Sources of nitrous acid and nitric acid in air in the parts-per-billion concentration range are provided by means of room-temperature oxalic acid sublimation onto solid sodium nitrite and potassium nitrate, respectively. Nitrogen dioxide is not present and nitric oxide is present only at a small percentage in the nitrous acid source at relative humidities in the 30-60% range. The presence of nitrous acid is verified by spectroscopic and chemical reaction studies. Nitric oxide, hydrogen cyanide, and other compounds can be similarly produced with appropriate target compounds. Nitrogen dioxide from permeation devices must be used in plastic systems to minimize impurities.
Databáze:	OpenAIRE
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