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Related Experiment Videos

A photometric method for ozone determination using alizarin violet.

Y Baijnath1, C Vasam, S B Jonnalagadda

  • 1School of Chemistry, Westville Campus, Univerisy of KwaZulu-Natal, Durban, South Africa.

Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering
|October 14, 2004
PubMed
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A new photometric method uses alizarin violet to detect ozone (O3) in real-time. This simple and reliable technique accurately measures ozone concentrations for various applications.

Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Accurate ozone (O3) monitoring is crucial for environmental and industrial applications.
  • Existing methods for ozone determination may lack on-line capabilities or require complex procedures.

Purpose of the Study:

  • To develop and validate a novel photometric method for the on-line determination of ozone.
  • To assess the reliability and reproducibility of the proposed method for ozone concentration measurement.

Main Methods:

  • A photometric method based on the reaction between alizarin violet and ozone at pH 10 was employed.
  • The method's performance was evaluated for on-line ozone determination using an ozonizer.
  • Results were compared against the standard iodide method, following International Ozone Association guidelines.

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Main Results:

  • Alizarin violet reacts with ozone in a 6:1 stoichiometric ratio.
  • The photometric method demonstrated simplicity, reliability, and reproducibility.
  • The method successfully determined ozone concentrations in the range of 1.0–5.0 mg L⁻¹ on-line without procedural changes.

Conclusions:

  • The developed photometric method provides a simple, reliable, and reproducible means for on-line ozone determination.
  • This technique is suitable for monitoring ozone generated by ozonizers within the specified concentration range.
  • The alizarin violet-based method offers a viable alternative for real-time ozone analysis.