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pH Effect for the Separation of Lanthanides with Pyromellitic Acid and Oxalic Acid
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1993, v.6 no.1, pp.121-129
Lee,
K., Kim,
C., Sung,
H., &
Chang,
C.
(1993). pH Effect for the Separation of Lanthanides with Pyromellitic Acid and Oxalic Acid. Analytical Science and Technology, 6(1), 121-129.
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Abstract
UV/VIS spectrophotometer interfaced with HPIC(High Performance Ion Chromatography) has been applied to the determination of lanthanide elements. The separation of lanthanide elements with HPIC helped to avoid erroneous analytical results due to interferences. Individual lanthanide elements at ppm level were separated on a HPIC CS5 column using pyromellitic acid and oxalic acid. The individual lanthanide elements were detected at 520nm following post-column reaction with PAR. Sm, Eu, Gd, Y, Tb, Dy, Ho, Er, Tm, Tb, and Lu were separated by pyromellitic acid. La, Ce, Pr and Nd were separated by oxalic acid. Appropriate pH of pyromellitic acid for separation was at pH 2.99.
- keywords
- Lanthanide elements, UV/VIS spectrophotometery
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