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Recoveries of elements following fast decomposition of biological and other materials by alkaline-oxidative fusion
Kučera, Jan ; Krausová, Ivana
Recoveries of selected elements were studied for fast decomposition of biological and other materials using alkaline-oxidative fusion in a mixture of NaOH and Na2O2 at 850 to 900°C. The procedure yields total mineralization of samples within 2 to 3 minutes. It is therefore especially suitable in radiochemical activation analysis (RAA) for determination of elements forming short-lived radionuclides. Recoveries of the elements F, Si, S, Cl, Ti, V, Mn, Ge, As, Br, Mo, Ru, In, Sb, I, Re, Os, and U determined using radiotracers were in the range 95-100 %, while those for Se and Hg were significantly lower and highly variable.
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