ArticleJournal of materials research2025
Conductometric sensor for potassium ion profiling using lipophilic salt-incorporated non-toxic ion-selective membrane.
Article in Journal of materials research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Why Sensors Fail in Biological Samples: Fouling, Blocking, Matrix Effects and Prevention Solutions.International journal of molecular sciences · 2026Review
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Conductometric ion-selective electrodes (ISEs) offer a promising alternative to conventional potentiometric ISEs due to their suitability for miniaturization, real-time monitoring, and reduced calibration requirements. Here, a non-toxic potassium-selective ionophore, 2-dodecyl-2-methyl-1,3-propanediyl bis[N-[5'-nitro(benzo-15-crown-5)-4'-yl]carbamate] (K-III/BME-44), was incorporated into a polyvinyl chloride (PVC)-based ion-selective membrane (ISM), along with the lipophilic salt potassium tetrakis(4-chlorophenyl)borate (KTpClPB). The membrane was deposited onto gold interdigitated electrodes to facilitate impedance-based measurements. Sensor performance was evaluated, demonstrating that the sensitivity, selectivity, and dynamic range of the ISE can be modulated by adjusting the concentration of KTpClPB. The optimized K-III-based ISEs exhibited a threefold higher response compared to the commonly used, but toxic, valinomycin-based counterpart under equivalent conditions. Selectivity coefficients, determined using both the Separate Solution Method (SSM) and the Fixed Interference Method (FIM), confirmed excellent potassium selectivity comparable to established potentiometric ISEs. These results highlight the potential of K-III-based conductometric ISEs for safe and accurate potassium detection in complex bioanalytical environments. Graphical abstract: Supplementary Information: The online version contains supplementary material available at 10.1557/s43578-025-01738-w.
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Registered trials
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