▎ 摘　　要

NOVELTY - The sensor has two working electrodes, one reference electrode and a high-temperature resistant polymer film substrate which is provided with a first circuit. The working electrodes are respectively provided with a calcium ion selective electrode and a potassium ion selective electrode. The calcium ion selective electrode is provided with a composite material composed of a graphene, a high molecular polymer and a specific calcium ion detecting mixture. The potassium ion selective electrode is provided with a composite material composed of a mixture of graphene, a high molecular polymer, and a specific potassium ion detecting mixture. USE - Calcium-potassium ion detecting sensor based on graphene composite material, used for medical diagnostic, drug testing, food inspection, environmental protection, bioengineering and military. ADVANTAGE - The calcium-potassium ion detecting sensor is flexible, and realizes separate detection or joint detection of calcium ions and potassium ions. The device has strong controllability, and displays unique open circuit potential at calcium and potassium ion concentration of 0.25 to 2 mM. The high sensitivity, high specificity, low interference, comprehensive performance, and real-time detection are achieved. The sensor is easy to carry and applied to human skin. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation of open circuit potential detection of detecting sensor.