NOx speciation from copper dissolution in nitric acid/water solutions using FTIR spectroscopy

• Published in: Journal of molecular spectroscopy Vol. 372; p. 111334
• Main Authors: Dorhout, Jacquelyn M., Anderson, Aaron S., Batista, Enrique, Carlson, Rebecca K., Currier, Robert P., Martinez, Ronald K., Clegg, Samuel M., Wilkerson, Marianne P., Nowak-Lovato, Kristy
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2020; Elsevier
• Subjects: Copper dissolution; FTIR; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; N2O; NO2; NOx; Speciation; NO2; NO; Copper dissolution; FTIR; NOx; N2O; Speciation
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/j.jms.2020.111334

[Display omitted] •Analysis of NOx (NO, NO2, N2O) concentrations produced from the dissolution of copper metal in nitric acid.•FTIR spectra used to calculate concentrations of NOx species.•Discussion of vapor phase reactions. The speciation of NO2, NO, and N2O gases formed from the dissolution of copper in nitric acid is measured and characterized using Fourier-transform infrared (FTIR) spectroscopy. This study describes analysis of the gas phase species formed and ingrowths of their concentrations as a function of time. Acid concentrations range from 14 to 4 M and the NO2, NO, and N2O are analyzed using FTIR between 1585 and 2209 wavenumbers. The concentrations of the gases range from 0 to 230 ppm and change over time and as a function of acid concentration.