There is an increasing worldwide demand for rare earth elements (REEs) in new technological applications—such as electronics, superconductors, space applications, etc. The determination of low concentration REEs geological samples extremely important since they are the source materials all REE products. In order to improve accuracy and precision measurements by inductively coupled plasma mass s...

A new sample introduction method of nebulized film dielectric barrier discharge (NFDBD) assisted chelate vapor generation coupled with inductively plasma mass spectrometry (ICP-MS) for trace rare earth elements (REEs) determination in environmental water was developed this work. Using 2,2,6,6-tetramethyl-3,5-heptanedione (DPM) as chelating reagent, the volatile and stable chelates REE-DPM were ...

The quantification of the rare earth elements (REEs) in natural rocks and fluids is important not only for sustainable use geological resources but also fundamental research. Due to significant improvements experimental, modelling analytical techniques, it was discovered that REEs could be efficiently mobilised transported by hydrothermal fluids. Thus, determining fluids, especially highly sali...

There is a natural epimorphism from the symmetric algebra to the Rees algebra of an ideal. When this epimorphism is an isomorphism, we say that the ideal is of linear type. Given two determinantal rings over a field, we consider the diagonal ideal, kernel of the multiplication map. We prove in many cases that the diagonal ideal is of linear type and recover the defining ideal of the Rees algebr...