The Front Cover illustrates a renewable potentiometric multi-sensor for simultaneous determination of chloride, sodium, potassium, and calcium ions in human body fluids. The miniaturized PEEK-based paste electrode integrates four ion-selective sensing units that enable rapid, simultaneous electrolyte analysis in saliva, sweat, and blood serum; this highlights its applicability for physiological monitoring. More information can be found in the Research Article by B. Niemiec, N. Lenar and B. Paczosa-Bator (DOI: 10.1002/cphc.202500636).
Niemiec et al. (Fri,) studied this question.