AI Article Synopsis
- A new flexible ion-selective sensor for potassium and sodium detection uses a pseudo-liquid internal solution, enhancing stability in analytical signals compared to traditional solid contact systems.
- The sensor achieves good sensitivity, with Nernstian responses of approximately 56 mV/dec for both ions, and demonstrates quick response times of 5 seconds for potassium and 8 seconds for sodium.
- Biocompatibility was confirmed through potassium measurements in biofilms, aligning with past data, indicating the sensor's effectiveness in practical applications.
Article Abstract
A novel flexible ion-selective sensor for potassium and sodium detection was proposed. Flexible ion-selective electrodes with pseudo-liquid internal solution on contrary to the system with a solid contact provided a more stable analytical signal. Such advantages were achieved because of polyelectrolyte (PEI/PSS) layers adsorption on the conduct substrate with a layer-by-layer technique. Such an approach demonstrated that ion-selective electrodes save sensitivity with Nernstian dependence: 56.2 ± 1.4 mV/dec and 56.3 ± 1.9 mV/dec , as well as a fast time of response for potassium (5 s) and sodium (8 s) was shown. The sensing platform proposed demonstrates a better time of response and is close to the Nernstian value of sensitivity with a sensor low cost. The results proposed confirm a pseudo-liquid junction for the ion-selective electrode. Biocompatibility of an ion-selective sensing platform was demonstrated at potassium potentiometric measurements in biofilms. Potassium levels in a biofilm were measured with potentiometry and showed agreement with the previous results.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6761682 | PMC |
| http://dx.doi.org/10.1021/acsomega.9b01464 | DOI Listing |
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