Electrochemistry
Potentiometric Ion-Selective Sensing
Thick-film ISEs measure Na+, K+, Cl-, Ca++, pH via electromotive force.
Overview
The BiQadx Vital+Gas platform relies on a solid-state electrochemical sensor array. By utilizing miniaturized Ion-Selective Electrodes (ISE), we achieve rapid, reagent-free quantification of critical blood analytes from finger-prick whole blood volumes.
Architecture & Design
The sensor array consists of a silver/silver chloride (Ag/AgCl) reference electrode and multiple working electrodes coated with specialized ionophore-doped polymeric membranes. The target ions selectively partition into the membrane, generating an electromotive force proportional to the logarithmic concentration of the analyte, conforming to the Nernst equation.
Technical Specifications
Fabrication Method
Thick-film Screen Printing
Substrate
Alumina Ceramic
Response Time
< 45 seconds
Operational Drift
< 0.1 mV / hour