Quick Determination of Neodymium in Mixtures of Rare Earths by Derivative Spectrophotometric Method

Abstract

Abstract: It is known that the Neodymium Tiron complex has a characteristic abso-rption (578nm) which can be used to determine Nd. If derivative spectrum is used to replace common spectrophotometry, interferences of Ce and Pr can be avoided. The authors have found the other two strong absorption peaks (255nm> 310nm) possessed by rare earths in ultraviolet region. The peak (255nm) has no selectivity but lies at the same wavelength and the molar absorbance coefficient e is a very near thing on all rare earth elements. Thus this peak can be used to determine the total amount of rareearth. Based on this, we measured it at two wavelengths (578nm and 255nm). As a result, a non-weighing derivative spectrophotometric methodfor quick determination of Nd, in mixtures of Rare Earths is established by us.This method has been used in three synthesizing samples and a real sample. Theresults obtained are qutie satisfactory.

Key words: Neodymium, Rare earths, Derivative spectrophotometric

TrendMD:

Zhou Shifu, Li Zhong . Quick Determination of Neodymium in Mixtures of Rare Earths by Derivative Spectrophotometric Method[J]. Chem. J. Chinese Universities, 1988, 9(8): 850.

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Quick Determination of Neodymium in Mixtures of Rare Earths by Derivative Spectrophotometric Method

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