Abstract
Dynamic ion exchange has been used for rapid separation (15 min) and determination of rare earth elements (REE) in samples coming from semi-processed monazitic sand, after a heavy fraction separation by solvent extraction. In this study the hydrochloric acid solutions containing REE were injected into the mobile phase (α-hydroxyisobutiric acid) in the presence of hydrophobic ions on a C18 bonded silica reversed-phase column. The eluted REE were monitored by visible spectrophotometry at 535 nm after post-column reaction with pyridylazoresorcinol. The reversed-phase partition system is adequate to separate and detect all REE with good reproducibility. This method gave improved column efficiency for metal ions and greater flexibility in the choice of separation conditions. The results obtained in the present study showed good reproducibility and sensitivity and the method may be considered reliable enough to be used in routine quality control procedure. Comparison of the REE values obtained by high-performance liquid chromatography (HPLC) in this study with inductively coupled plasma atomic emission spectrometry (ICP-AES) values showed a good agreement for all elements.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
