This paper presents a method for the determination of ultra-trace platinum and ultra-trace palladium in rock ore by graphite furnace atomic absorption spectrometry after extraction from phenylthiourea-octanol. The conditions for extraction of platinum and palladium, the interference of co-existing ions and the optimum instrumentation conditions were studied. The liquid phase extraction was conducted after the sample was dissolved by aqua regia, and then the sample test was measured in the organic phase. The detection limit of platinum and that of palladium were 0.5×10 -9 and 0.1×10 -9. The relative standard deviations of the method were 6.0% and 4.7%, respectively, for eight samples with platinum 14.7×10 -9 and palladium15.2×10 -9 from the repeated sampling and dissolution. The relative standard deviations are 6.0% and 4.7% respectively, showing relatively good analytical quality.
官东超. 石墨炉原吸收光谱法测定化探样品中超痕量铂钯[J]. 物探与化探, 2018, 42(5): 1054-1058.
Dong-Chao GUAN. The application of graphite furnace atomic absorption spectrometry to determination of ultra-trace platinum and ultra-trace palladium in rock ore. Geophysical and Geochemical Exploration, 2018, 42(5): 1054-1058.