溶剂浮选-偏最小二乘回归光度法测定地质样品中痕量贵金属元素

Determination of Trace Ruthenium, Rhodium, Palladium and Gold in Geological Samples by Solvent Flotation-Partial Least Squares Regression-Spectrophotometry

研究了贵金属Ru、Rh、Pd、Au-SnCL_2-RB体系及缔和物溶剂浮选的条件,采用偏最小二乘回归法对重叠光谱进行解析及数据处理.对地质样品中Ri、Rh、Pd、Au同时测定,相对误差小于11.1%;标准偏差为0.0062～00.19.

The optimum conditions of solvent flotation of trace noble metals (M: Ru, Rh, Pd and Au) and the color system of M-SnCl2-rhodamine B were studied. The partial least squares-spectrophotometry was used to resolve the overlapping absorption spectra of the associated complexes were determined. The result showed that the system had higher sensitivity and stability. Ru, Rh, Pd and Au in geological samples were determined simultaneously. The relative error was less than 11. 1 %, and standard deviations were 0.0062 to 0.019.