Related Experiment Video
Updated: Jun 9, 2026

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
Published on: May 7, 2018
Mitigation and detection of spurious potassium and sodium results
R A Sulaiman1, P J Twomey, R Gama
1Clinical Chemistry, New Cross Hospital, Wolverhampton, West Midlands, UK. raashda3@aol.com
Abstract:
Spurious laboratory results are results that are analytically correct but do not accurately reflect the in vivo plasma analyte concentrations. Spurious electrolyte results often lead to unnecessary testing or injudicious treatment and have an adverse effect on patient outcome. In this review we discuss the preanalytical and analytical variables that lead to spurious sodium and potassium results. We describe ways to detect them both in the laboratory and in clinical practice and suggest how to prevent them.
Related Concept Videos
Antihypertensive Drugs: Potassium-Sparing Diuretics
Qualitative Analysis
For instance, group IV...
Regulation of Sodium and Potassium
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily in...
Roles of Electrolytes: Sodium and Potassium
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Ionic Bonds

