Use of Doubly Charged Ions in the Determination of Certain Rare Earth Elements in Neodymium, Samarium, Europium, and Their Compounds by Inductively Coupled Plasma Mass Spectrometry

摘要

It is proposed to use doubly charged ions of the rare earth elements (REEs) to be determined in samples of neodymium, samarium, europium, and gadolinium by inductively coupled plasma mass spectrometry (ICP-MS) in order to reduce spectral interferences caused by oxide and hydroxide matrix ions. Optimal conditions for the registration of the doubly charged ions of REEs (resolution, depth of plasma sampling, generator output power, and argon flow in a nebulizer) are developed. The limits of determination for the REEs determined using singly and doubly charged ions in the samples of Nd, Sm, Eu, and Gd are evaluated. It is shown that the use of the signal from the doubly charged ions of odd isotopes allows reducing the limits of determination for Dy, Ho, Tm, and Er in neodymium, samarium, europium, and their oxides by one to two orders of magnitude.