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- W2082511273 abstract "A potassium ion-selective electrode based on a cobalt(II)-hexacyanoferrate(III) (CHCF) film-modified glassy carbon electrode is proposed. The electroactive film is introduced onto the glassy carbon electrode surface by electrodeposition of cobalt, which forms a thin CHCF film on subsequent anodic scanning in KClHCl solution (pH 5.0–5.5) containing K3Fe(CN)6. The thickness of the film on the electrode surface can be controlled by changing the electrodeposition time and the concentrations of cobalt(II) and Fe(CN)3−6 ions. The modified electrode exhibits a linear response in the concentration range 1 × 10−1 −3 × 10−5 M potassium ion activity, with a near-Nernstian slope (48–54 mV per decade) at 25 ± 1°C. The detection limit is 1 × 10−5 M. The stability, response time and selectivity were investigated. The electrode exhibits good selectivity for potassium ion with the twelve cations investigated. The relative standard deviation is 1.5% (n=10). The effects of the thickness of the electroactive film and the pH of the solution on the electrode response were also investigated." @default.
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- W2082511273 date "1991-01-01" @default.
- W2082511273 modified "2023-09-27" @default.
- W2082511273 title "Potassium ion-selective electrode based on a cobalt(II)-hexacyanoferrate film-modified electrode" @default.
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- W2082511273 doi "https://doi.org/10.1016/s0003-2670(00)82476-9" @default.
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