Simultaneous Electrochemical Detection of Dopamine and Tryptophan Using 3D Goethite–Spongin Composites
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reagents
2.2. Apparatus and Measurements
2.3. Preparation of the Electrodes
3. Results and Discussion
3.1. Electrochemical Characterization of Prepared Electrodes
3.2. Electrochemical Response of Sensors towards DA and TRP Oxidation
3.3. Influence of pH on DA and TRP Oxidation
3.4. Scan Rate Influence on the Oxidation of DA and TRP
3.5. Individual Determination of DA and TRP
3.6. Simultaneous Determination of DA and TRP
3.7. Investigation of Stability, Repeatability, Reproducibility, and Selectivity of 3DGS/CPE
3.8. Determination of DA and TRP in Real Samples
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Sample | Spiked DA (μM) | Detected DA (μM) | Recovery (%) 1 | RSD (%) | Spiked TRP (μM) | Detected TRP (μM) | Recovery (%) | RSD (%) |
---|---|---|---|---|---|---|---|---|
Sample 1 | - | 138.38 | - | 3.4 | - | 0.3 | - | 2.1 |
100 | 238.88 | 100.5 | 2.8 | 50 | 53.69 | 106.78 | 4.2 | |
Sample 2 | - | 57.35 | - | 3.1 | - | 0.2 | - | 1.8 |
50 | 108 | 101.3 | 2.5 | 50 | 58.42 | 116.44 | 3.9 |
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Falahi, S.; Kubiak, A.; Voronkina, A.; Ehrlich, H.; Joseph, Y.; Rahimi, P. Simultaneous Electrochemical Detection of Dopamine and Tryptophan Using 3D Goethite–Spongin Composites. Biomimetics 2024, 9, 357. https://doi.org/10.3390/biomimetics9060357
Falahi S, Kubiak A, Voronkina A, Ehrlich H, Joseph Y, Rahimi P. Simultaneous Electrochemical Detection of Dopamine and Tryptophan Using 3D Goethite–Spongin Composites. Biomimetics. 2024; 9(6):357. https://doi.org/10.3390/biomimetics9060357
Chicago/Turabian StyleFalahi, Sedigheh, Anita Kubiak, Alona Voronkina, Hermann Ehrlich, Yvonne Joseph, and Parvaneh Rahimi. 2024. "Simultaneous Electrochemical Detection of Dopamine and Tryptophan Using 3D Goethite–Spongin Composites" Biomimetics 9, no. 6: 357. https://doi.org/10.3390/biomimetics9060357