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Specific Ionic Recognition Using Fig's Xylem/Phloem Vessel as a Novel and Applicable Device: Lab-on-a Xylem/Phloem
Nahid Maghsoudi1, Mohammad Mahdi Doroodmand1
1Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
ACS Omega
|June 27, 2022
Summary
A new biosensor uses voltage-stimulated ion transport in fig plant vessels for specific ion detection. This novel lab-on-a-substrate system offers high sensitivity and reliability for analyzing various ionic species in real samples.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Plant Science
Background:
- Traditional methods for ion detection can be complex and time-consuming.
- There is a need for rapid, specific, and sensitive analytical systems.
- Biological substrates offer unique properties for developing novel sensor platforms.
Purpose of the Study:
- To introduce a novel lab-on-a-substrate detection system utilizing ion transport through fig xylem/phloem vessels.
- To demonstrate the system's capability for specific recognition and quantification of ionic species.
- To establish a reliable and sensitive method for ultratrace ion analysis.
Main Methods:
- A voltage-stimulating ion transport system was developed using fig xylem/phloem as a substrate.
- Sinusoidal waveforms at low frequency (2.70 kHz) and variable voltage (0-1.0 kV) were applied to induce ion flux.
- Fingerprint electrical potentials were recorded for ion recognition, complemented by electrical current and conductance gradient measurements.
Main Results:
- The system achieved excellent linearity (R² > 0.99) with ranges of 5.0-1200.0 ng mL⁻¹ for various ionic species.
- High sensitivity was demonstrated, with improved detection limits for cationic and anionic species.
- Reliable recognition of over 60 distinct cationic and anionic species was achieved using a 70-membered bio-substrate array.
Conclusions:
- The developed system offers a specific, sensitive, and reliable method for detecting and separating a wide range of ionic species.
- The fig xylem/phloem-based biosensor provides a competitive alternative to conventional spectroscopic and electrochemical systems.
- A software database was created for direct detection and recognition, enhancing the applicability of this novel analytical approach.
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