Flieger A, Przeszlakowski S
Department of Inorganic and Analytical Chemistry, Medical School, 20-081 Lublin, Poland.
Talanta. 1982 Nov;29(11 Pt 1):946-8. doi: 10.1016/0039-9140(82)80159-8.
Mixtures of gold(III) and iridium(IV) were separated by column extraction chromatography on silica treated with a tri-n-octylamine (TOA) salt. A mixture 2.25M in hydrochloric acid and 5M in nitric acid was used for elution of iridium. Gold was eluted together with the TOA salt by acetone, and after evaporation of the acetone, the TOA chloroaurate was dissolved in chloroform, converted into TOA bromoaurate and determined spectrophotometrically at 395 nm ( = 3.4 x 10(3) l.mole(-1) .cm(-1)). Beer's law was obeyed over the concentration range 5-67 ppm of gold. The method was found suitable for determination of gold after its separation from other metals by extraction chromatography on supports treated with liquid anion-exchangers.
通过在经三正辛胺（TOA）盐处理的硅胶上进行柱萃取色谱法分离金（III）和铱（IV）的混合物。用2.25M盐酸和5M硝酸的混合物洗脱铱。金与TOA盐一起用丙酮洗脱，丙酮蒸发后，氯金酸TOA盐溶解于氯仿中，转化为溴金酸TOA盐，并在395nm处进行分光光度测定（ε = 3.4×10³ l·mol⁻¹·cm⁻¹）。在金浓度为5 - 67ppm范围内符合比尔定律。该方法适用于通过在经液体阴离子交换剂处理的载体上进行萃取色谱法从其他金属中分离后测定金。
