Nitithep Chaichuay. Determination of transition metals by high performance liquid chromatography. Master's Degree(Applied Analytical and Inorganic Chemistry). Mahidol University. Mahidol University Library and Knowledge Center. : Mahidol University, 1998.
Determination of transition metals by high performance liquid chromatography
Abstract:
Ion-Interaction Chromatography employing tartaric acid and octane sulfonic acid was developed for the separation of seven transition metal ions Cu2+, Zn2+, Ni2+, Co2+, Mn2+, Fe2+ and Fe3+ on reversed-phase C-18 column. 4-(2-pyridylazo)-resorcinol (PAR) was used as the post-column reagent with detection by UV-Visible absorbance at 520 nm. The results show that the seven metal ions can be separated in 20 minutes. The effect on the retention behavior of ion-interaction reagent (IIR) concentration, tartaric acid concentration, pH of the mobile phase, the addition of organic modifier and the solvent of metal ions were studied. The system was applied to the determination of Fe3+ and Fe2+ in iron supplementary tablets. Total amount of iron by using ascorbic acid as a reducing agent, which converted Fe3+ to Fe2+, was also measured and compared with the results for direct injection. The results show no significant differences between both methods. This method was also applied to analyse metal ions in river water.