title: Calibration of direct ion-selective electrodes for plasma Na+ to allow for the influence of protein concentration.
mesh_terms: D001798:Blood Proteins / Q000032:analysis*; D001834:Body Water; D004566:Electrodes; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D010783:Photometry; D011188:Potassium / Q000097:blood; D012964:Sodium / Q000097:blood*
chemical_list: D001798:Blood Proteins; D012964:Sodium; D011188:Potassium