title: The analysis of 3H and 14C labelled compounds in the form of doubly labelled methane.
mesh_terms: D002250:Carbon Radioisotopes / Q000032:analysis*; D008697:Methane; D011874:Radiometry / Q000379:methods; D014316:Tritium / Q000032:analysis*
chemical_list: D002250:Carbon Radioisotopes; D014316:Tritium; D008697:Methane