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EXTRACTION-FLUORIMETRIC DETERMINATION OF EUROPIUM AND TERBIUM

Л.И. Кононенко, R.S. Lauer, N.S. Poluektov

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Abstract

Conditions were found for the extraction-fluorimetric determination of europium and terbium in the total rare earth oxides. Determination is carried out in benzene solutions of diphenanthrolinetrisalicylate complexes of the elements. Europium is determined by a fluorescent band with the fluorescence maximum at 612 m mu , terbium by the maximum at 543 m mu . Spectra are recorded on a spectrograph with a photoelectric device, a mercury lamp is used as an ultraviolet radiation source. The determination is carried out by the method of additions. The sensi-tivity of the method is 0.1--0.2% of Eu and Tb in the total rare earth oxides. (auth)

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What this paper is about

Conditions were found for the extraction-fluorimetric determination of europium and terbium in the total rare earth oxides. Determination is carried out in benzene solutions of diphenanthrolinetrisalicylate complexes of the elements. Europium is determined by a fluorescent band with the fluorescence maximum at 612 m mu , terbium by the maximum at 543 m mu . Spectra are recorded on a spectrograph with a photoelectric device, a mercury lamp is used as an ultraviolet radiation source. The determination is carried out by the method of additions. The sensi-tivity of the method is 0.1--0.2% of Eu and Tb in the total rare earth oxides. (auth)

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Available abstract

Conditions were found for the extraction-fluorimetric determination of europium and terbium in the total rare earth oxides. Determination is carried out in benzene solutions of diphenanthrolinetrisalicylate complexes of the elements. Europium is determined by a fluorescent band with the fluorescence maximum at 612 m mu , terbium by the maximum at 543 m mu . Spectra are recorded on a spectrograph with a photoelectric device, a mercury lamp is used as an ultraviolet radiation source. The determination is carried out by the method of additions. The sensi-tivity of the method is 0.1--0.2% of Eu and Tb in the total rare earth oxides. (auth)

Key concepts: Terbium, Europium, Fluorescence, Extraction (chemistry), Chemistry, Analytical Chemistry (journal), Benzene, Ultraviolet

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