scholarly journals Determination of sodium and potassium ions in patients with SARS-Cov-2 disease by ion-selective electrodes based on polyelectrolyte complexes as a pseudo-liquid contact phase

RSC Advances ◽  
2021 ◽  
Vol 11 (57) ◽  
pp. 36215-36221
Author(s):  
Liubov V. Pershina ◽  
Andrei R. Grabeklis ◽  
Ludmila N. Isankina ◽  
Ekaterina V. Skorb ◽  
Konstantin G. Nikolaev
Keyword(s):  
Supramolecular Assemblies ◽  
Ion Selective Electrodes ◽  
Potassium Ions ◽  
Contact Phase ◽  
Polyelectrolyte Complexes ◽  
Sodium And Potassium

Supramolecular assemblies based on polyelectrolyte complexes made it possible to create complex interfaces with predictable properties. Polyelectrolyte complexes serve as a pseudo-liquid contact in ion-selective electrodes.

Lithium determinations evaluated in eight analyzers

1994 ◽  
Vol 40 (6) ◽  
pp. 869-872 ◽  
Author(s):  
M Sampson ◽  
M Ruddel ◽  
R J Elin
Keyword(s):  
Colorimetric Method ◽  
Atomic Emission ◽  
Ion Selective Electrodes ◽  
Drug Interference ◽  
Flame Atomic Absorption ◽  
Analytical Recovery ◽  
And Performance ◽  
Mean Differences ◽  
Sodium And Potassium

Abstract We compared five ion-selective electrodes (ISEs; AVL 985S, Baxter Lytening 2Z, Beckman EL-ISE, Ciba-Corning 654 Na/K/Li, and Nova CRT 11) and a colorimetric method (Ektachem) for determination of lithium with flame atomic absorption and atomic emission spectroscopy. We evaluated precision, recovery, interference by drugs (procainamide, N-acetylprocainamide, quinidine, lidocaine, carbamazepine, and valproic acid) and inorganic analytes (Na, K, Ca, Mg, and Br), and performance with sera from patients receiving lithium. Imprecision was < 5% (CV) for all analyzers except Ektachem and Beckman. Analytical recovery was 100% +/- 5% for all analyzers except Ektachem and Baxter. Some drug interference was seen with all analyzers except AVL and Corning. Calcium caused interference with AVL, Corning, and Ektachem analyzers, and sodium and potassium interfered with the Ektachem analyzer. The results with the Baxter, Beckman, and Corning analyzers were closest to those by flame atomic emission (mean differences, 0.01 to 0.02 mmol/L); the AVL and Nova analyzers gave lower results (mean differences, -0.11 to -0.13 mmol/L) and the Ektachem gave higher results (mean difference, 0.08 mmol/L).

Field determination of sodium and potassium in feldspars by ion-selective electrodes

1975 ◽  
Vol 15 (3) ◽  
pp. 217-222 ◽  
Author(s):  
John H. Puffer ◽  
Robert S. Cohen
Keyword(s):  
Ion Selective Electrodes ◽  
Sodium And Potassium
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