Polyvinyl Alcohol Enhancement of Electrochemical Stability of Silver ion on Paper-Based Biosensor for Cyanide Detection

Session

Pharmaceutical and Natural Sciences

Description

Cyanide is a highly toxic compound that poses significant risks to human health and environmental safety, Consequently, the development of portable and environmentally sustainable platforms for cyanide detection is of critical importance. In this study, a ready-touse paper-based electrochemical device is presented for the detection of cyanide. The detection mechanism is based on the electrochemical formation of a stable silver–cyanide complex, enabling direct quantification. The device is fabricated by immobilizing silver ions (Ag⁺) and supporting electrolytes onto a cellulose-based substrate, with polyvinyl alcohol (PVA) incorporated as a stabilizing polymer matrix. PVA forms a semi-permeable, hydrophilic film that mitigates oxidative degradation and volatilization of Ag⁺, thereby enhancing the long-term stability of the sensor. The optimized sensor demonstrates a limit of detection (LOD) of 0.77 µM and exhibits stable analytical performance for up to 60 days with minimal signal attenuation. Validation yielded results in strong agreement with ion chromatography, confirming the practical applicability of the platform. This work highlights the potential of PVA-stabilized electrochemical devices for effective and field-deployable monitoring of cyanide in resource-limited settings.

Keywords:

Cyanide, Ready-to-use, Paper-Based Electrochemical sensor, Stability, PVA

Proceedings Editor

Edmond Hajrizi

ISBN

978-9951-982-41-2

Location

UBT Lipjan, Kosovo

Start Date

25-10-2025 9:00 AM

End Date

26-10-2025 6:00 PM

DOI

10.33107/ubt-ic.2025.354

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Oct 25th, 9:00 AM Oct 26th, 6:00 PM

Polyvinyl Alcohol Enhancement of Electrochemical Stability of Silver ion on Paper-Based Biosensor for Cyanide Detection

UBT Lipjan, Kosovo

Cyanide is a highly toxic compound that poses significant risks to human health and environmental safety, Consequently, the development of portable and environmentally sustainable platforms for cyanide detection is of critical importance. In this study, a ready-touse paper-based electrochemical device is presented for the detection of cyanide. The detection mechanism is based on the electrochemical formation of a stable silver–cyanide complex, enabling direct quantification. The device is fabricated by immobilizing silver ions (Ag⁺) and supporting electrolytes onto a cellulose-based substrate, with polyvinyl alcohol (PVA) incorporated as a stabilizing polymer matrix. PVA forms a semi-permeable, hydrophilic film that mitigates oxidative degradation and volatilization of Ag⁺, thereby enhancing the long-term stability of the sensor. The optimized sensor demonstrates a limit of detection (LOD) of 0.77 µM and exhibits stable analytical performance for up to 60 days with minimal signal attenuation. Validation yielded results in strong agreement with ion chromatography, confirming the practical applicability of the platform. This work highlights the potential of PVA-stabilized electrochemical devices for effective and field-deployable monitoring of cyanide in resource-limited settings.