title: Ion-exchange chromatographic analysis of peroxynitric acid.
abstract: Ion-exchange chromatographic analysis of peroxynitric acid (O2NOOH) was performed by combining an acidic eluate with an UV-vis detector and immersing the separation column in an ice-water bath. The decomposition behavior of peroxynitric acid in the solution was also studied using this system. The fraction for the peroxynitric acid peak was collected. Ion-exchange chromatographic analysis of this fraction, after standing at room temperature for 24h, showed that the decomposition products were mainly nitrate ions with a very small amount of nitrous acid. The peroxynitric acid peak area correlated perfectly with the total amount of decomposition products. The ion-exchange chromatographic isolation allowed us to evaluate the molar extinction coefficient of peroxynitric acid precisely in a wider wavelength range than previous reports. The value decreases monotonically from 1729±26M(-1)cm(-1) at 200nm to 12.0±0.5M(-1)cm(-1) at 290nm.
authors.affiliation: Technology Research Institute of Osaka Prefecture, Izumi, Osaka 594-1157, Japan. Electronic address: nakashima@tri-osaka.jp.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Nakashima
authors.affiliation: Technology Research Institute of Osaka Prefecture, Izumi, Osaka 594-1157, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ikawa
authors.affiliation: Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Tani
authors.affiliation: Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Katsuhisa
authors.initials: K
authors.lastname: Kitano
mesh_terms: D002852:Chromatography, Ion Exchange; D009566:Nitrates / Q000032:analysis* / Q000737:chemistry; D012996:Solutions
chemical_list: D009566:Nitrates; D012996:Solutions; C039642:peroxynitric acid
keywords: Decomposition behavior; Ion-exchange chromatography; Low pH; Low temperature; Molar extinction coefficients; Peroxynitric acid