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A simple and versatile PSA system for heavy metal determinations.
A Bund1, J Dittmann, D Lordkipanidze
1Physikalische Chemie, Universität des Saarlandes, Geb. 9.2, Im Stadtwald, D-66123, Saarbrücken, Germany.
Analytical and Bioanalytical Chemistry
|August 1, 1996
Summary
A low-cost potentiometric stripping analysis system for determining heavy metals like zinc, cadmium, lead, and copper was developed. This system offers good sensitivity and precision, making it a viable alternative to expensive commercial equipment.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Heavy metal contamination poses significant environmental and health risks.
- Accurate and affordable detection methods are crucial for environmental monitoring.
Purpose of the Study:
- To describe the development of an inexpensive potentiometric stripping analysis (PSA) system.
- To evaluate the system's performance for determining zinc (Zn), cadmium (Cd), lead (Pb), and copper (Cu).
Main Methods:
- Utilized an IBM compatible computer and an ADDA-conversion card.
- Employed self-made electrodes: a mercury-film coated graphite pencil lead working electrode and a Ag/AgCl reference/counter electrode.
- Performed reproducibility, calibration, and soil sample analysis, comparing results with Atomic Absorption Spectroscopy (AAS).
Main Results:
- The developed PSA system demonstrated good sensitivity and precision for heavy metal determination.
- The system's cost is approximately one-tenth of commercial alternatives.
- Results for heavy metal determination in soil samples showed good agreement with AAS.
Conclusions:
- The described potentiometric stripping analysis system is a cost-effective and reliable tool for heavy metal analysis.
- This system provides a practical solution for laboratories with limited budgets.
- It facilitates improved environmental monitoring of heavy metals in samples like soil.