title: Sodium and potassium ion selective electrodes: a review of theory and calibration.
mesh_terms: D004553:Electric Conductivity; D004566:Electrodes; D006801:Humans; D011188:Potassium / Q000097:blood*; D011199:Potentiometry; D012964:Sodium / Q000097:blood*
chemical_list: D012964:Sodium; D011188:Potassium