title: LIQUID SCINTILLATION COUNTING ERRORS DUE TO OXYGEN-QUENCHING OF SAMPLES PREPARED BY THE OXYGEN-FLASK COMBUSTION PROCEDURE.
mesh_terms: D001826:Body Fluids; D002247:Carbon Isotopes; D004864:Equipment and Supplies; D005243:Feces; D009584:Nitrogen; D010100:Oxygen; D011868:Radioisotopes; D011874:Radiometry; D012106:Research; D012588:Scintillation Counting; D014316:Tritium; D014556:Urine
chemical_list: D002247:Carbon Isotopes; D011868:Radioisotopes; D014316:Tritium; D009584:Nitrogen; D010100:Oxygen
keywords: CARBON ISOTOPES; EQUIPMENT AND SUPPLIES; EXPERIMENTAL LAB STUDY; FECES; NITROGEN; OXYGEN; RADIOISOTOPES; RADIOMETRY; TRITIUM; URINE