Published September 30, 1999
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Determination of praseodymium in mixed rare earths by norfloxacin
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Department of Chemistry, Shandong University, Jinan, 250100, People's Republic of China
Manuscript received 4 January 1999, revised 17 May 1999, accepted 20 May 1999
A method is described for the derivative spectrophotometric determination of trace amounts of praseodymium as its complex with norfloxacin. The absorption bands of 4f-electron transitions of praseodymium complex with norfloxacin are enhanced markedly. Using the second derivative spectra, the calibration graph is linear over the range 5-35 µg cm-3 of Pr. The method has been successfully used for the determination of Pr in mixed rare earths.
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