Determination of Hg2+ on poly(vinylferrocenium) (PVF+)-modified platinum electrode

Area of Science:

• Electrochemistry
• Environmental Science
• Materials Science

Background:

• Mercury ions (Hg2+) pose significant environmental and health risks.
• Sensitive and reliable detection methods for Hg2+ are essential for water quality monitoring.
• Existing methods may face limitations in sensitivity or applicability.

Purpose of the Study:

• To develop a new poly(vinylferrocenium) (PVF(+))-modified platinum electrode for Hg2+ determination.
• To investigate the preconcentration and detection mechanisms of Hg2+ using the modified electrode.
• To evaluate the performance and applicability of the developed electrode for real water samples.

Main Methods:

• Electrodeposition of poly(vinylferrocenium) (PVF(+)) onto a platinum electrode.
• Anion exchange to incorporate chloride ions (Cl-) into the polymer matrix.
• Preconcentration of Hg2+ via adsorption and complexation.
• Detection using differential pulse anodic stripping voltammetry (DPASV).

Main Results:

• The developed electrode demonstrated high sensitivity for Hg2+ detection, with a limit as low as 5 x 10(-10)M.
• The relative standard deviation was 6.35% at 1 x 10(-6)M Hg2+ (n=6), indicating good reproducibility.
• The electrode showed potential for determining Hg2+ in actual water samples, with interference studies also performed.

Conclusions:

• The PVF(+)-modified platinum electrode is a promising sensor for sensitive and selective determination of Hg2+ in aqueous solutions.
• The combination of polymer modification, anion exchange, and DPASV offers an effective strategy for trace mercury analysis.
• This approach has practical implications for environmental monitoring and water quality assessment.