WebThere are two methods for measuring serum electrolytes using ISE: direct and indirect. As the name suggests, with direct ISE the patient’s serum sample is brought into direct contact with the electrode surface and the activity of the relevant ion is measured in the plasma water of the serum. WebHow the Patient Benefits from Direct Potentiometry • Direct ISE methods report results with more physiologically correct values1 • More accurate patient diagnosis and ... N. Fox, and R. Gama. Effect of low serul total protein on sodium and potassium measurement by ion selective electrodes in critically ill patients British Journal of ...
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WebPotentiometry is a technique that is used in analytical chemistry, usually to find the concentration of a solute in solution. In this technique, the potential between two electrodes is measured using a high-impedance voltmeter (Wang, 2000 ). Use of a high-impedance voltmeter ensures that current flow is negligible. WebSodium was determined by flame photometry and by direct potentiometry in 56 serum or plasma samples from 24 patients with multiple myeloma or macroglobulinemia. We observed differences between the two techniques as large as 17 mmol/L (12%). commonwealth games adam peaty
pH / Ion Selective Electrodes - Chemistry LibreTexts
WebEvaluation of a direct potentiometric method for sodium and potassium used in the Du Pont aca We evaluated an accessory that enables the Du Pont aca discrete analyzer to measure Na+ and K+ by direct potentiometry (aca/ISE). Na+ and K+ gave linear responses in both the blood and urine modes, with no carryover. WebJan 1, 1971 · A potentiometric analyzer, developed to directly measure potassium and sodium concentrations, was evaluated on aqueous solutions, whole blood, serum, and … WebMay 25, 2024 · The direct potentiometry is easily carried out and it enables the determinations in the absence of the interferents. Unfortunately, it is not robust to the influence of the matrix on the registered signals. In order to level the influence of the interferents S-SAM, Gran’s method or multivariate calibration methods might be used. duck store bookshelf