Spectrophotometric determination of ozone in solutions: Molar absorption coefficient in the visible region

Spectrophotometric determination of ozone in solutions: Molar absorption coefficient in the... A new approach for the determination of ozone concentration in solutions in organic liquids based on spectrophotometric absorbance measurements in the visible region was proposed and substantiated. The molar absorption coefficient of ozone in the absorption maximum at ~600nm is 8.0mol−1 L cm−1 for hydrocarbons (hexane, heptane, isooctane), CHCl3 and CCl4, and 5.3mol−1 L cm−1 for methanol and 4.5mol−1 L cm−1 for water (±10%). The coefficient monotonically decreases with increasing dielectric constant of the liquid. The low molar absorption coefficient allows the use of spectrophotometric measurements for determination of high ozone concentrations ranging from approximately 1·10−2mol L−1 up to 1.0mol L−1. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Elsevier

Spectrophotometric determination of ozone in solutions: Molar absorption coefficient in the visible region

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Publisher
Elsevier
Copyright
Copyright © 2019 Elsevier Ltd
ISSN
1386-1425
D.O.I.
10.1016/j.saa.2019.03.038
Publisher site
See Article on Publisher Site

Abstract

A new approach for the determination of ozone concentration in solutions in organic liquids based on spectrophotometric absorbance measurements in the visible region was proposed and substantiated. The molar absorption coefficient of ozone in the absorption maximum at ~600nm is 8.0mol−1 L cm−1 for hydrocarbons (hexane, heptane, isooctane), CHCl3 and CCl4, and 5.3mol−1 L cm−1 for methanol and 4.5mol−1 L cm−1 for water (±10%). The coefficient monotonically decreases with increasing dielectric constant of the liquid. The low molar absorption coefficient allows the use of spectrophotometric measurements for determination of high ozone concentrations ranging from approximately 1·10−2mol L−1 up to 1.0mol L−1.

Journal

Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyElsevier

Published: Jun 15, 2019

References

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