title: Interference from heparin in commercial heparinised tubes in the measurement of plasma sodium by ion selective electrode: a note of caution.
mesh_terms: D001800:Blood Specimen Collection / Q000295:instrumentation; D004566:Electrodes; D005188:False Negative Reactions; D006493:Heparin; D006801:Humans; D010783:Photometry / Q000379:methods; D011188:Potassium / Q000097:blood; D012964:Sodium / Q000097:blood*
chemical_list: D006493:Heparin; D012964:Sodium; D011188:Potassium