title: [Direct method of liquid scintillation counting of plasma samples by internal-external standardization].
mesh_terms: D001769:Blood; D002127:Calcium Isotopes; D008722:Methods; D011868:Radioisotopes; D011874:Radiometry; D013460:Sulfur Isotopes; D014316:Tritium
chemical_list: D002127:Calcium Isotopes; D011868:Radioisotopes; D013460:Sulfur Isotopes; D014316:Tritium
vernacular_title: Comptage direct des echantillons plasmatiques en scintillation liquide par etalonnage interne-externe.