Polyelectrolyte Based Sensors as Key to Achieve Quantitative Electronic Tongues: Detection of Triclosan on Aqueous Environmental Matrices
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Impedance Spectroscopy Measurements: Sensor Response
3.2. Principal Component Analysis: Sensor Capabilities
3.3. Sensorial Layers’ Evaluation—Sensor Stability
3.4. Electronic Tongue—Sensor Sensitivity and Resolution
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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DW | MW | EF * | |
---|---|---|---|
pH | 7.2 ± 0.1 | 5.7 ± 0.3 | 8.4 ± 0.1 |
Conductivity (μS/cm) | 46.5 ± 0.7 | 113 ± 37 | 1400 ± 500 |
ICP analysis (mg/L) | |||
Ca | - | 0.75 ± 0.1 | 39.1 ± 2.8 |
Cu | - | - | 0.02 ± 0.01 |
K | - | - | 22.9 ± 0.4 |
Mg | - | 7.3 ± 0.6 | 18.2 ± 5.1 |
Na | - | 1.7 ± 0.1 | 161 ± 58 |
P | - | - | 2.2 ± 0.2 |
S | - | - | 32.9 ± 8.6 |
Zn | - | - | 0.07 ± 0.02 |
IC analysis (mg/L) | |||
Cl− | - | 9.3 ± 0.4 | 488.7 ± 593.2 |
SO42− | - | 1.3 ± 0.3 | 84.1 ± 92.4 |
Aqueous Matrices | Thin-Film Combinations | Number of Bilayers |
---|---|---|
DW | PAH/GO and PEI/PSS | 5 |
MW | PAH/GO and PEI/PSS | 5 |
EF | PAH/GO | 5 |
PEI/PSS | 5, 10, and 20 |
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Magro, C.; Zagalo, P.; Pereira-da-Silva, J.; Pires Mateus, E.; Branco Ribeiro, A.; Ribeiro, P.; Raposo, M. Polyelectrolyte Based Sensors as Key to Achieve Quantitative Electronic Tongues: Detection of Triclosan on Aqueous Environmental Matrices. Nanomaterials 2020, 10, 640. https://doi.org/10.3390/nano10040640
Magro C, Zagalo P, Pereira-da-Silva J, Pires Mateus E, Branco Ribeiro A, Ribeiro P, Raposo M. Polyelectrolyte Based Sensors as Key to Achieve Quantitative Electronic Tongues: Detection of Triclosan on Aqueous Environmental Matrices. Nanomaterials. 2020; 10(4):640. https://doi.org/10.3390/nano10040640
Chicago/Turabian StyleMagro, Cátia, Paulo Zagalo, João Pereira-da-Silva, Eduardo Pires Mateus, Alexandra Branco Ribeiro, Paulo Ribeiro, and Maria Raposo. 2020. "Polyelectrolyte Based Sensors as Key to Achieve Quantitative Electronic Tongues: Detection of Triclosan on Aqueous Environmental Matrices" Nanomaterials 10, no. 4: 640. https://doi.org/10.3390/nano10040640