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Separation preconcentration method for platinum and rhodium from environmental samples using a chelating resin
C Bosch Ojeda1, F Sánchez Rojas, J M Cano Pavón
1Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, E-29071, Málaga, Spain.
Annali Di Chimica
|January 16, 2007
Summary
This study presents a new method for detecting trace platinum and rhodium using flow injection online coupled with electrothermal atomic absorption spectrometry (ETAAS). The technique effectively separates and preconcentrates these metals for accurate analysis.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Materials Science
Background:
- Accurate determination of trace platinum and rhodium is crucial in various fields.
- Existing methods may face challenges with complex matrices and low concentrations.
- Need for sensitive and selective analytical techniques for precious metal detection.
Purpose of the Study:
- To develop and validate a novel method for determining trace levels of platinum and rhodium.
- To investigate the efficacy of flow injection (FI) coupled with electrothermal atomic absorption spectrometry (ETAAS).
- To assess the performance of a specific immobilized chelating agent for metal preconcentration.
Main Methods:
- Flow injection (FI) on-line coupled with electrothermal atomic absorption spectrometry (ETAAS).
- Zeeman effect background correction for enhanced accuracy.
- Utilized a microcolumn packed with 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide immobilized on silica gel (DPTH-gel) for separation and preconcentration.
- Direct elution with nitric acid into the graphite furnace for analysis.
Main Results:
- The developed method allows for the determination of trace platinum and rhodium.
- Successful separation and preconcentration of metals from complex matrices were achieved.
- The DPTH-gel demonstrated effective adsorption capabilities for platinum and rhodium.
Conclusions:
- The FI-ETAAS method with DPTH-gel is a viable technique for trace platinum and rhodium determination.
- This approach offers a sensitive and efficient way to analyze precious metals.
- The method is suitable for various sample types requiring trace metal analysis.
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