Ion-exchange chromatographic analysis of peroxynitric acid

Nakashima, Yusuke; Ikawa, Satoshi; Tani, Atsushi; Kitano, Katsuhisa

doi:10.1016/j.chroma.2015.12.054

Cited by 20 publications

(37 citation statements)

References 17 publications

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“…The bactericidal efficacy could be related to other chemically reactive species, such as ONOOH and O 2 NOOH. For example, recent work by Nakashima et al showed the similarity of the spectra of H 2 O 2 and O 2 NOOH. Thus far, we have an incomplete database of UV absorption spectra due to insufficient shelf lifetimes (unstable at room temperature) and similar absorption spectra.…”

Section: Resultsmentioning

confidence: 99%

Investigation on the long‐term bactericidal effect and chemical composition of radical‐activated water

Iwata

Gamaleev

et al. 2019

Plasma Processes & Polymers

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We treat deionized water using an atmospheric‐pressure radical source to investigate the role of neutral radicals in the bactericidal efficacy of radical‐activated water (RAW). The bactericidal efficacy of RAW is investigated using a colony‐forming unit assay with Escherichia coli. Both the bactericidal efficacy and reactive oxygen and nitrogen species (RONS) concentration in stored RAW are investigated over a period of a month. E. coli was completely sterilized even in RAW stored for 7 days, indicating the strong bactericidal effect. However, deterioration of the bactericidal efficacy of RAW stored for 14 days is confirmed, which does not have a clear correlation with the time evolution of the RONS concentration. This result becomes a strong evidence that RAW has long‐term bactericidal efficacy.

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Section: Resultsmentioning

confidence: 99%

Investigation on the long‐term bactericidal effect and chemical composition of radical‐activated water

Iwata

Gamaleev

et al. 2019

Plasma Processes & Polymers

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“…However, the main decomposition product from nitric acid is NO3 -, 45) which we did measure in this study. To accurately quantify further molecules by our UV-Vis will require analysis of the reference spectrum at different wavelengths for each individual molecule at different concentrations, as detailed in a previous publication.…”

Section: Uv-vismentioning

confidence: 94%

Modulating the concentrations of reactive oxygen and nitrogen species and oxygen in water with helium and argon gas and plasma jets

Ogawa

Gaur

et al. 2018

Jpn. J. Appl. Phys.

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We employed UV–vis spectroscopy to monitor real-time changes in the oxygen tension and concentration of reactive oxygen and nitrogen species (RONS) in deionized (DI) water during treatments with helium (He) and argon (Ar) gas plasma jets. He and Ar gas jets are both shown to de-oxygenate DI water with He being more efficient than Ar, whilst the plasma jets deliver and regulate the concentrations of hydrogen peroxide (H2O2), nitrite (NO2−) and nitrate (NO3−) in DI water. The H2O2 and NO3− production efficiency varied between He and Ar plasma jets, but was similar for NO2−. Whilst DI water fully equilibrated with ambient air prior to treatment (de-oxygenated by both plasma jets) when DI water was first de-oxygenated by an inert gas jet treatment, both plasma jets were found to be capable of oxygenating DI water. These insights were then used to show how different combinations of plasma jet and inert gas jet treatments can be used to modulate O2 tension and RONS chemistry. Finally, potential further improvements to improve control in the use of plasma jets in regulating O2 and RONS are discussed.

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“…This trend supports the above argument. There are a large number of reports on the experimental and theoretical analyses of plasma-treated water with air or air containing gases as the discharge source gases, [21][22][23][24][25][26][27][28] but none on those with pure or rare-gas-diluted CO 2 . For further understanding of the products in the plasma-treated water, measurements of the densities of active species such as H and OH radicals are expected using laser-induced fluorescence spectroscopic methods.…”

Section: Discussionmentioning

confidence: 99%

Measurements of water molecule density by tunable diode laser absorption spectroscopy in dielectric barrier discharges with gas–water interface

Tachibana

Nakamura

Kawasaki

et al. 2017

Jpn. J. Appl. Phys.

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We measured water molecule (H 2 O) density by tunable diode-laser absorption spectroscopy (TDLAS) for applications in dielectric barrier discharges (DBDs) with a gas-water interface. First, the effects of water temperature and presence of gas flow were tested using a Petri dish filled with water and a gas injection nozzle. Second, the TDLAS system was applied to the measurements of H 2 O density in two types of DBDs; one was a normal (non-inverted) type with a dielectric-covered electrode above a water-filled counter electrode and the other was an inverted type with a water-suspending mesh electrode above a dielectric-covered counter electrode. The H 2 O density in the normal DBD was close to the density estimated from the saturated vapor pressure, whereas the density in the inverted DBD was about half of that in the former type. The difference is attributed to the upward gas flow in the latter type, that pushes the water molecules up towards the gas-water interface.

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Ion-exchange chromatographic analysis of peroxynitric acid

Cited by 20 publications

References 17 publications

Investigation on the long‐term bactericidal effect and chemical composition of radical‐activated water

Investigation on the long‐term bactericidal effect and chemical composition of radical‐activated water

Modulating the concentrations of reactive oxygen and nitrogen species and oxygen in water with helium and argon gas and plasma jets

Measurements of water molecule density by tunable diode laser absorption spectroscopy in dielectric barrier discharges with gas–water interface

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