Ultraviolet Absorption Spectrum of Hydrogen Peroxide

Holt, R. B.; McLane, C. K.; Oldenberg, O.

doi:10.1063/1.1746843

Cited by 54 publications

(10 citation statements)

References 11 publications

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“…Two measurements of the cross section for this molecule are available in the spectral range 175 to 230 nm; Holt et al (38) and Schurgers and Welge (37). A comparison of the data from these two groups is given in Fig.…”

Section: Hydroget1 Peroxide Homentioning

confidence: 99%

“…The region of overlap for these two sets of data is small, and within this region the argeement is not good. Holt et al (38) did not use a vacuum monochromator; their instrument was equipped with the means for circulating nitrogen in the optical path. This equipment was designed to avoid the difficulty of absorption by molecular oxygen in the light path, and the sudden rise in the data near 200 nm could indicate that the system did not work adequately.…”

Section: Hydroget1 Peroxide Homentioning

confidence: 99%

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Absorption Cross Sections of Stratospheric Molecules

Hudson¹

1974

Can. J. Chem.

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Photoabsorption cross sections necessary for calculations of the equilibrium conditions in the stratosphere fall into two distinct classes: cross sections for molecular oxygen and ozone, which control the transmission of solar radiation; cross sections for minor atmospheric species which are optically thin to solar radiation, and which are needed to calculate their rates of dissociation.The principal absorption features of molecular oxygen are absorption bands of the Schumann-Runge system between 175 and 200 nm and a weak dissociation continuun~ which extends from 175 to 260 nnl. The band structure consists of many sharp rotational lines, and it is necessary to calculate cross sections using measured band parameters. Two measurements of the line widths for these bands have obtained large line widths (-1 cm-') indicating predissociation. The agreement between the two sets of data is good for only a few I~nes. This has in~plications in the calculation of the transmission of solar radiation to the lower stratosphere. The continua have been measured by four groups. The results agree, within the respective experimental errors, near 220 nm, but disagree near 250 nm.Ozone has a continuous absorption spectrum between 175 and 300 nm with band structure above 300 nm. Four sets of data are available which agree within *2%. The cross section above 300 nni is temperature dependent. The cross sections for the minor species are in general not as well known. In nitric oxide, carbon monoxide, ammonia, and sulfur dioxide, band structure dominates the absorption spectrum, and cross sections have been measured at insufficient spectral resolution. Other species, such as nitric acid, hydrogen peroxide, water vapor, carbon dioxide, nitrous oxide, and nitrogen dioxide, have continua over the entire spectra range from 175 to 300 nm. Cross sections for these species have been measured; however, cross sections for many molecules, e.g., NzO;, NO,, etc., have not been studied.Ides coupes de photoabsorption ntcessaires pour les calculs des conditions d'tquilibre dans la stratosphtre se rtpartissent en deux classes distinctes: les coupes de l'oxygtne et I'ozone moltculaires qui contr6lent la transmission des radiations solaires; les coupes d'esptces atmosphtriques secondaires qui sont optiquement poreuses aux radiations solaires et qui sont ntcessaires pour le calcul cle leur vitesse cle dissociation.Les principales caracttristiques d'absorption de l'oxygbne molCculaire sont cles bandes d'absorption du systtme Schumann-Runge entre 175 et 200 nm et une faible dissociation continu qui s'ttend de 175 h 260 nm. La structure de bandes consiste en plusieurs lignes fines de rotation et il est ntcessaire de calculer les sections droites en utilisant les paramttres de bandes mesurts. Deux mesures de largeurs des lignes de ces bandes montrent d'importantes largeurs des lignes (-1 cm-') indiquant une prtdissociation. L'accord entre les deux stries de donntes est bon pour quelques lignes seulement. Ceci comporte des implications dans le calcul de la tran...

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Section: Hydroget1 Peroxide Homentioning

confidence: 99%

Section: Hydroget1 Peroxide Homentioning

confidence: 99%

Absorption Cross Sections of Stratospheric Molecules

Hudson¹

1974

Can. J. Chem.

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“…Thus each cell on average receives ca. 3.6 W irradiation in 200–300 nm, the range leading to direct H 2 O 2 dissociation into the •OH radicals [45, 50–52]. In comparison, UV irradiation of the 5.5-W lamp in the single-cell reactor is centered at 254 nm [41], accounting for ca.…”

Section: Resultsmentioning

confidence: 99%

Pretreatment of whole blood using hydrogen peroxide and UV irradiation. Design of the advanced oxidation process

Bragg

Armstrong

Chen

2012

Talanta

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A new process to pretreat blood samples has been developed. This process combines the Advanced Oxidation Process (AOP) treatment (using H2O2 and UV irradiation) with acid deactivation of the enzyme catalase in blood. A four-cell reactor has been designed and built in house. The effect of pH on the AOP process has been investigated. The kinetics of the pretreatment process shows that at high CH2O2,t = 0, the reaction is zeroth order with respect to CH2O2 and first order with respect to Cblood. The rate limiting process is photon flux from the UV lamp. Degradation of whole blood has been compared with that of pure hemoglobin samples. The AOP pretreatment of the blood samples has led to the subsequent determination of chromium and zinc concentrations in the samples using electrochemical methods.

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“…- [19], and 254 nm for the hydrogen peroxide H 2 O 2 [20] as seen in the magnified view images of dotted square region of Fig. 9.…”

Section: Density Of Hydroxyl Oh Radical Species and Its Influence On mentioning

confidence: 99%

“…Atmospheric pressure non-thermal plasma could generate various kinds of reactive oxygen species inside the biosolutions during their interactions on the surface. Plasma-induced ultraviolets have been generated by reactive species of nitric oxide (NO) [17,18], superoxide anion (O 2 * -) [19], hydrogen peroxide (H 2 O 2 ) [20], and hydroxyls (OH) [4,10,18,[21][22][23]] on boundary surface of plasma and biosolutions. These ultraviolets, whose wavelength ranged from 210 nm (6 eV) to 309 nm (4.2 eV), propagate into solutions below more than 2 mm to excite the water molecules and dissociate them to induce ROS generation inside the biosolution.…”

Section: Optical Emission Spectroscopy Of Non-thermal Plasma Jet Insimentioning

confidence: 99%

Measurement of Reactive Hydroxyl Radical Species Inside the Biosolutions During Non-thermal Atmospheric Pressure Plasma Jet Bombardment onto the Solution

Kim

Hong

Baik

et al. 2014

Plasma Chem Plasma Process

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Non-thermal atmospheric pressure plasma jet could generate various kinds of radicals on biosolution surfaces as well as inside the biosolutions. The electron temperature and ion density for this non-thermal plasma jet have been measured to be about 0.8*1.0 eV and 1 9 10 13 cm -3 in this experiment, respectively, by atmospheric pressure collisional radiative model and ion collector current. In this context, the hydroxyl OH radical density inside the biosolutions has been also investigated experimentally by ultraviolet absorption spectroscopy when the Ar non-thermal plasma jet has been bombarded onto them. It is found that the emission and absorption profiles for the other reactive oxygen species such as NO (226 nm) and O 2 * -(245 nm) are shown to be very small inside the biosolution in comparison with those for the OH radical species. It is found that the densities of OH radical species inside the biosolutions are higher than those on the surface in this experiment. The densities of the OH radical species inside the deionized water, Dulbecco's modified eagle medium, and phosphate buffered saline are measured to be about 2.1 9 10 16

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Ultraviolet Absorption Spectrum of Hydrogen Peroxide

Abstract: The absorption coefficient for hydrogen peroxide vapor in the wave-length range 1850–2200A was determined. A careful redetermination of the absorption coefficients for the vapor and for aqueous solutions at 2537A was also made.

Cited by 54 publications

References 11 publications

Absorption Cross Sections of Stratospheric Molecules

Absorption Cross Sections of Stratospheric Molecules

Pretreatment of whole blood using hydrogen peroxide and UV irradiation. Design of the advanced oxidation process

Measurement of Reactive Hydroxyl Radical Species Inside the Biosolutions During Non-thermal Atmospheric Pressure Plasma Jet Bombardment onto the Solution

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