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Algae columns with anodic stripping voltammetric detection.

W W Kubiak, J Wang, D Darnall

    Analytical Chemistry
    |March 1, 1989
    PubMed
    Summary
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    Silica-immobilized algal cells offer a durable and economical method for on-line separation and continuous monitoring of trace metals in flow analysis. This innovative approach enhances analytical accuracy by selectively removing interfering substances.

    Area of Science:

    • Environmental Science
    • Analytical Chemistry
    • Biotechnology

    Background:

    • Trace metal analysis in environmental samples is crucial but often hindered by complex matrices and interfering substances.
    • Traditional column separation methods for flow analysis can be inefficient and costly.
    • Algal biomass possesses unique properties for metal binding, but its direct use in flow systems presents challenges.

    Purpose of the Study:

    • To develop and evaluate a novel on-line separation system for trace metal monitoring using silica-immobilized algal cells.
    • To integrate this system with anodic stripping voltammetry for enhanced analytical performance.
    • To assess the system's efficiency, durability, and economic viability compared to existing methods.

    Main Methods:

    • Immobilization of the alga Chlorella pyrenidosa onto porous silica supports.

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  • Development of a flow analysis system incorporating the algae-silica columns for on-line separation.
  • Application of on-line anodic stripping voltammetry for continuous trace metal detection.
  • Optimization of operational parameters including flow rate, pH, and operation time.

    • Main Results:

    • The algae-silica columns demonstrated selective and exhaustive removal of interfering constituents, preventing peak overlap and intermetallic effects.
    • The developed system exhibited high durability, simplicity, and cost-effectiveness.
    • Successful on-line separation and continuous monitoring of trace metals were achieved using Chlorella pyrenidosa immobilized on silica.

    Conclusions:

    • Silica-immobilized algal cells provide a robust and efficient matrix for flow analysis applications in trace metal determination.
    • This method offers a significant advancement over conventional columns, improving accuracy and reducing operational complexity.
    • The system presents an attractive, economical alternative for on-line trace metal monitoring in various analytical contexts.