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Updated: Jun 28, 2026
08:29
Thermal Measurement Techniques in Analytical Microfluidic Devices
Published on: June 3, 2015
Application of direct thermometric analysis in iodometry.
1Institute for General and Analytical Chemistry, Technical University of Budapest, Gellért tér 4, Budapest, Hungary.
Talanta
|December 1, 1970
Summary
A thermometric method using potassium iodide accurately determines elementary chlorine. This direct method is simpler and faster than indirect titration for measuring chlorine content via temperature rise.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Accurate determination of elementary chlorine is crucial for environmental monitoring and industrial processes.
- Existing methods for chlorine determination can be complex or time-consuming.
Purpose of the Study:
- To develop and validate a simpler, more rapid thermometric method for elementary chlorine determination.
- To compare the efficiency of a direct thermometric method with indirect titration.
Main Methods:
- Utilized a thermometric titration method employing potassium iodide as the primary reagent.
- Measured the temperature rise resulting from the exothermic reaction between chlorine and potassium iodide.
- Quantified the liberated iodine using sodium thiosulphate titration for comparison.
Main Results:
- The observed temperature increase was directly proportional to the chlorine concentration.
- The heat of reaction for the chlorine-iodide interaction was found to be approximately five times greater than that of the iodine-thiosulphate reaction.
- The direct thermometric determination using potassium iodide proved to be more straightforward and quicker than the indirect method.
Conclusions:
- The thermometric method with potassium iodide offers a simplified and expedited approach for elementary chlorine analysis.
- This method provides a reliable alternative for quantifying chlorine content, particularly in scenarios demanding rapid results.
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