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Related Concept Videos

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Related Experiment Video

Updated: Jun 28, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices
08:29

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

Fluoride determination with a micro flow-calorimeter.

C Johansson1

  • 1Department of Analytical Chemistry, Chemical Center, University of Lund, Lund, Sweden.

Talanta
|November 1, 1972
PubMed
Summary
This summary is machine-generated.

This study introduces a new flow calorimeter method for precise fluoride determination using an anion-exchange resin. The technique accurately quantizes fluoride in various sample sizes with high confidence limits.

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Last Updated: Jun 28, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices
08:29

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Published on: June 3, 2015

Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products
09:24

Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products

Published on: August 22, 2017

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
07:17

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Accurate fluoride determination is crucial for environmental monitoring and public health.
  • Existing methods may have limitations in sensitivity or sample handling.

Purpose of the Study:

  • To develop and validate a novel calorimetric method for precise fluoride quantification.
  • To assess the method's applicability across a range of fluoride concentrations.

Main Methods:

  • Utilized a flow calorimeter integrated with an anion-exchange resin for sample absorption.
  • Employed the reaction between hydrofluoric acid and sodium hydroxide for determination.
  • Applied the method to samples containing 7 µg to 5 mg of fluoride.

Main Results:

  • Achieved confidence limits of +/-2.5 µg for small samples and +/-25 µg for large samples.
  • Determined the enthalpy of the reaction H(+) + F(-) --> HF((aq)) to be 13.77 +/- 0.08 kJ/mol.

Conclusions:

  • The developed calorimetric method offers a reliable and sensitive approach for fluoride analysis.
  • This technique is suitable for diverse sample matrices and quantities, enhancing analytical capabilities.