Instrumental Neutron Activation Analysis of Titanium for Its Impurity-elements

Five impurity-elements of Mn, As, Sb, Ta and W in metal titanium were determined by INAA. The GEM 70P High-purity Ge γ Spectrometer and the analytical software of Grammavision 32 were used in the analysis. The pretreated sample, in form of a thin piece sized 5 mm×5 mm×1 mm and weighing ca. 180 mg, was irradiated together with standards in the reactor with a flux of 1.0×1013cm-2·s-1. Detection limits of the 5 elements were found as 0.022, 0.049, 0.032, 0.097 and 0.015 μg respectively. The proposed method was used to analyzed a CRM of water sediment (GBW 07312) giving results of Mn, Ta, Sb and W in consistency with the certified values.