Simultaneous Determination of Rare Earth Elements by ICP OES After On-Line Enrichment Using Multi-Walled Carbon Nanotubes Coated Cellulose Acetate Membrane

Abstract

This study investigates application of multi-walled carbon nanotubes coated cellulose acetate membrane for on-line extraction and preconcentration of some rare earth elements (Y, La, Ce, Nd, Sm, Gd and Dy) prior to their determination by inductively coupled plasma optical emission spectrometry. Sample solutions containing rare earth elements (pH: 6.0) and l-(2-pyridylazo) 2-naphtol (4.0 × 10 -5 mol L -1 ) were passed through the membrane (flow rate: 5.0 mL min -1). The adsorbed cations were subsequently eluted from the membrane and transferred into the plasma with nitric acid solution (flow rate: 3.0 mL min -1 ) for simultaneous determination of them. The effect of different experimental parameters on the performance of the method were studied and discussed. Under the optimized conditions and preconcentration of 25 mL of sample, the enrichment factors of 185-201 and the detection limits of 0.05-0.3 μg L -1 were obtained.

Wet gravity separation and froth floatation techniques for rare earth elements beneficiation from monazite ore in Jordan

“…The ICP-OES technique is a feasible way for determining the REEs concentrations in complex samples because of the multi-element capacity, high specificity, precision, high accuracy and the fact that it exhibits a wide linear dynamic range [ [36] , [37] , [38] , [39] , [40] , [41] ]. At the end of each beneficiation step, samples were taken from the product and analyzed using ICP-OES Thermo Fisher Scientific iCAP 6300 technology.…”

Development of a Fast Simultaneous Analysis Method for Determination of Middle Rare-Earth Elements in Monazite Samples

“…The REEs are a highly coherent group of elements, and their accurate determination is essential in chemistry research [21]. Analysis and separation of the REEs from their sample matrix or even analysis and isolation of one REE being a single element are difficult because these metals have similar properties, especially physical and chemical properties, and universally originate in the same mineral assemblies [22].…”

The elemental analysis and multi-nuclear NMR study of an alkali molten salt used to digest reference and commercial SWCNT powders

“…[15][16][17] For many years, analytical tools such as inductively coupled plasma optical emission spectroscopy (ICP-OES) have been applied in this context. [18][19][20][21][22][23][24][25] Surprisingly, few teams have validated these studies against chemically certied SWCNT standard samples that have been commercialized for almost a decade. [26][27][28] Also, and despite the numerous analytical studies, the pre-treatment step continues to be the main hurdle in routine elemental analysis of graphitic nanocarbons.…”