title: The use of a probe-type colorimeter for the continuous monitoring of pH in association with the  137m Ba-EDTA infusion system.
mesh_terms: D001464:Barium / Q000008:administration & dosage*; D003124:Colorimetry / Q000295:instrumentation; D004492:Edetic Acid / Q000008:administration & dosage; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007275:Injections, Intravenous; D008722:Methods; D011868:Radioisotopes / Q000008:administration & dosage*
chemical_list: D011868:Radioisotopes; D001464:Barium; D004492:Edetic Acid