title: A comparison of instrument performance for six liquid scintillation counters.
mesh_terms: D002250:Carbon Radioisotopes / Q000032:analysis; D012588:Scintillation Counting / Q000295:instrumentation / Q000592:standards*; D014316:Tritium / Q000032:analysis
chemical_list: D002250:Carbon Radioisotopes; D014316:Tritium