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Determination of nanogram amounts of praseodymium and terbium by means of candoluminescence emission

R. Belcher, K. P. Ranjitkar, Alan Townshend

Abstract

Praseodymium and terbium give rise to intense red and green candoluminescence, respectively, in a calcium oxide-calcium sulphate matrix, placed in a hydrogen-nitrogen-air flame. The emissions are used to determine 0.05–1 ng of praseodymium and 1–25 ng of terbium in 1 µl of solution. Most other lanthanoids have little effect on the determination of praseodymium, but cerium, scandium, europium and praseodymium seriously interfere in the determination of terbium.

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Key concepts: Praseodymium, Terbium, Cerium, Europium, Chemistry, Lanthanide, Scandium, Inorganic chemistry