Molar Absorptivities of Ultraviolet and Visible Bands of Ozone in Aqueous Solutions

E.J. Hart; Knud Sehested; J. Holcman

doi:10.1021/ac00252a015

Molar Absorptivities of Ultraviolet and Visible Bands of Ozone in Aqueous Solutions

E.J. Hart, Knud Sehested, J. Holcman

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Abstract

The molar absorptivities of aqueous ozone solutions [.epsilon.(O3)] are reported for the wavelength ranges 190-300 nm and 350-900 nm. At the maxima of these bands, .epsilon.260(O3) = 3292 .+-. 70 M-1 cm-1 and .epsilon.590(O3) = 5.1 .+-. 0.1 M-1 cm-1. The analyses for ozone were carried out by absorbance measurements of the gas at 253.7 nm and by oxidation of FeSO4 in H2SO4 solution followed by back-titration of excess Fe2+ with KMnO4. Spectrophotometric analysis of Fe3+ was also used at low ozone concentrations. A stoichiometric ratio, Fe3+/O3, of 1.996 .+-. 0.036 was found. The visible spectrum of aqueous O3 is compared with that of ozone gas.

Original language	English
Journal	Analytical Chemistry
Volume	55
Issue number	1
Pages (from-to)	46-49
ISSN	0003-2700
DOIs	https://doi.org/10.1021/ac00252a015
Publication status	Published - 1983

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@article{8e62b6d5a8a74fb085a7a41c0e2c0832,

title = "Molar Absorptivities of Ultraviolet and Visible Bands of Ozone in Aqueous Solutions",

abstract = "The molar absorptivities of aqueous ozone solutions [.epsilon.(O3)] are reported for the wavelength ranges 190-300 nm and 350-900 nm. At the maxima of these bands, .epsilon.260(O3) = 3292 .+-. 70 M-1 cm-1 and .epsilon.590(O3) = 5.1 .+-. 0.1 M-1 cm-1. The analyses for ozone were carried out by absorbance measurements of the gas at 253.7 nm and by oxidation of FeSO4 in H2SO4 solution followed by back-titration of excess Fe2+ with KMnO4. Spectrophotometric analysis of Fe3+ was also used at low ozone concentrations. A stoichiometric ratio, Fe3+/O3, of 1.996 .+-. 0.036 was found. The visible spectrum of aqueous O3 is compared with that of ozone gas.",

author = "E.J. Hart and Knud Sehested and J. Holcman",

year = "1983",

doi = "10.1021/ac00252a015",

language = "English",

volume = "55",

pages = "46--49",

journal = "Analytical Chemistry",

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publisher = "American Chemical Society",

number = "1",

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TY - JOUR

T1 - Molar Absorptivities of Ultraviolet and Visible Bands of Ozone in Aqueous Solutions

AU - Hart, E.J.

AU - Sehested, Knud

AU - Holcman, J.

PY - 1983

Y1 - 1983

N2 - The molar absorptivities of aqueous ozone solutions [.epsilon.(O3)] are reported for the wavelength ranges 190-300 nm and 350-900 nm. At the maxima of these bands, .epsilon.260(O3) = 3292 .+-. 70 M-1 cm-1 and .epsilon.590(O3) = 5.1 .+-. 0.1 M-1 cm-1. The analyses for ozone were carried out by absorbance measurements of the gas at 253.7 nm and by oxidation of FeSO4 in H2SO4 solution followed by back-titration of excess Fe2+ with KMnO4. Spectrophotometric analysis of Fe3+ was also used at low ozone concentrations. A stoichiometric ratio, Fe3+/O3, of 1.996 .+-. 0.036 was found. The visible spectrum of aqueous O3 is compared with that of ozone gas.

AB - The molar absorptivities of aqueous ozone solutions [.epsilon.(O3)] are reported for the wavelength ranges 190-300 nm and 350-900 nm. At the maxima of these bands, .epsilon.260(O3) = 3292 .+-. 70 M-1 cm-1 and .epsilon.590(O3) = 5.1 .+-. 0.1 M-1 cm-1. The analyses for ozone were carried out by absorbance measurements of the gas at 253.7 nm and by oxidation of FeSO4 in H2SO4 solution followed by back-titration of excess Fe2+ with KMnO4. Spectrophotometric analysis of Fe3+ was also used at low ozone concentrations. A stoichiometric ratio, Fe3+/O3, of 1.996 .+-. 0.036 was found. The visible spectrum of aqueous O3 is compared with that of ozone gas.

U2 - 10.1021/ac00252a015

DO - 10.1021/ac00252a015

M3 - Journal article

SN - 0003-2700

VL - 55

SP - 46

EP - 49

JO - Analytical Chemistry

JF - Analytical Chemistry

IS - 1

ER -

Molar Absorptivities of Ultraviolet and Visible Bands of Ozone in Aqueous Solutions

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