Tách làm giàu bằng trao đổi ion lượng vết vàng trong quặng sunfit trước khi chiết xạ và phân tích định lượng bằng kỹ thuật kích hoạt nơtron

Radiochemical Neutron Activation Analysis (RNAA) for gold determination in sulfide ores was studied. The sample was ignited in a porcelain for one hour at 600o C and dissolved then with aqua regia. The gold was absorbed on an ion exchange resin AG 1 × 8 in medium 1N HCl. The resin sample was then irradiation in Da Lat nuclear reactor with neutron flux about 2.4× 1012 n/cm2 s. The radioactivity of gold was measured by Au-198 isotope on a detector GeHP connected Multichannel analyser (MCA) and PC pentum 586.