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High-Performance Liquid Chromatography: Types of Detectors01:15

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High-Sensitivity Sensor for Palladium Detection in Organic Solvent.

Adrianna Pach1, Agnieszka Podborska2, Magdalena Luty-Błocho1

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|June 26, 2025
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Summary

This study introduces a new method using UV-Vis and fluorescence spectroscopy to detect palladium(II) ions in ethanol. The developed technique offers a sensitive and rapid way to determine palladium concentrations, aiding in metal recycling.

Keywords:
Pd(II) ion determinationUV–Vis spectrophotometryazo-dye complexesethanol mediumfluorescence spectroscopy

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Materials Science

Background:

  • Accurate detection of palladium(II) ions is crucial for environmental monitoring and industrial processes, particularly in metal recycling.
  • Existing methods for palladium detection may lack sensitivity, speed, or applicability in organic solvents.

Purpose of the Study:

  • To develop and validate a tandem UV-Vis and fluorescence spectroscopy method for sensitive Pd(II) ion detection in ethanol.
  • To investigate the complex formation kinetics between Pd(II) and tropaeolin OO (TR OO).
  • To assess the method's applicability in complex matrices containing interfering metal ions.

Main Methods:

  • Utilized UV-Vis and fluorescence spectroscopy for Pd(II) detection.
  • Employed tropaeolin OO (TR OO) as a complexing agent.
  • Optimized detection conditions including reagent ratios (3:1 Pd(II):TR OO) and temperature (50 °C).
  • Conducted kinetic studies and DFT calculations to understand complex formation.
  • Tested method performance against common interfering metal ions.

Main Results:

  • The method achieved a limit of detection (LOD) of 10 μmol/dm³ for Pd(II) using both UV-Vis (at 535 nm) and fluorescence spectroscopy (at 630 nm after 10 min).
  • Fluorescence spectroscopy provided a rapid response within 10 minutes.
  • Stepwise complex formation was observed and supported by DFT calculations.
  • The method demonstrated high selectivity and applicability in complex matrices with minimal interference from other metal ions.

Conclusions:

  • The developed tandem spectroscopy method is efficient for determining palladium(II) ions in ethanol.
  • This approach offers a sensitive, rapid, and selective analytical tool for palladium determination.
  • The method supports sustainable practices in metal recycling by enabling effective palladium recovery and analysis.