Electrochemical properties and analytical advantages of potassium-selective sensor with tungsten trioxide solid contact

Recent advances in aptamer-based biosensors for potassium detection

“…A range of assays have been developed that exploit the chelation of K + with chemical ligands such as antimony tin oxide, valine, tungsten trioxide, and crown ether. [20][21][22][23] These sensors are portable and use simplified experimental reagents, but suffer from high toxicity of some ligands (e.g. crown ether) and poor sensitivity due to the poor affinity and specificity of some chelating agents.…”