Optimization of the procedure of determination of rare earth elements (REE) in chromium minerals
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Abstract
The objective of the work is the optimization of the primary procedure developed by CIPIMM for the determination of rare earth elements (REE) in chromium minerals, whose presence has been previously reported from results obtained abroad. For the determination of the REE classical chromatographic methods of separation and concentration were employed for which the resin DOWEX 50W-X8 (100-200 mesh) was selected, after dissolving the sample with HCl, HF, HNO3 and HClO4 and the incorporation of the molten residue and final determination by ICP-OES. A synthetic sample was used for all tests because there were no chromium reference samples with certified REE values. The chromatographic concentration separation conditions were optimized by means of an experimental design of type 23, studying the most significant variables, which were: volume of eluent in mL (100 and 200), concentration of HNO3 in Moles (5 and 10) and speed of flow in mL / min (2 and 4), selecting as optimal conditions for these variables the values: 200mL, 5M and 2 mL / min, respectively, with which recoveries between 95 and 105 were obtained for all the elements and also the best middle value. These results allowed the procedure to be incorporated into the laboratory's Quality System
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References
Álvarez A., Alfonso T. & Jarrosay M. 2019. Determinación de escandio en muestras de diversas matrices procedentes de posibles procesos para su recuperación. Memorias VIII Convención de Ciencias de La Tierra, GEOCIENCIAS 2019, Cuba: Instituto de Geología y Paleontología, ISBN: 978-959-7117-87-2.
Casañas X D, 2016. “Elementos de las tierras raras, elementos del grupo del platino y otros raros y dispersos: principales tipos genéticos de depósitos y posibles áreas de prospección en el territorio nacional. Parte 1”. INFOMIN Vol.8 (No.2, Julio-Diciembre):85-105, ISSN: 1992-4194, DOI: https://eqrcode.co/a/qbs8Ty
Casañas X D, 2017. Elementos de las tierras raras, elementos del grupo del platino y otros raros y dispersos: principales tipos genéticos de depósitos y posibles áreas de prospección en el territorio nacional. Parte 2, INFOMIN, Vol.9 (No.1 Enero-Junio), ISSN: 1992-4194, DOI: https://eqrcode.co/a/qbs8Ty.
Guía EURACHEM. 2016. La adecuación al uso de los métodos analíticos - Una Guía de laboratorio para la validación de métodos y temas relacionados, edición en español.
Jarrosay, M.; Álvarez A.; Alfonso, T. y otros. 2019. Desarrollo de procedimientos analíticos para la determinación de elementos del grupo del platino, metales preciosos y elementos de las tierras raras en minerales cromíticos. Informe de Investigación, La Habana, Cuba: Centro de Investigaciones para la Industria Minero Metalúrgica (CIPIMM).
Kiyoshi Iwasaki & Hhiroki Haraguchi.1988. “Determination of rare earth elements in Geological samples by Inductively-Coupled Plasma Atomic Emission Spectrometry after oxalate coprecipitation and cation-exchange column separation”. Analytica Chimica Acta 208: 163-172
Martínez Hernández J.L. 2009. Reseña sobre las metodologías de campo, analíticas y estadísticas empleadas en la determinación y manejo de datos de los elementos de tierras raras en el sistema suelo-planta, Rev. FCA UN Cuyo. Tomo XLI. N° 2, pp.153-189.
Saturnina H & otros. 2010. “Las cromititas del Complejo Ofiolítico de Camagüey, Cuba: un ejemplo de cromitas ricas en Al”. Boletín de la Sociedad Geológica Mexicana Volumen 62 (1):173-185.
Villalobos, J; Olave, S.; Núñez, C. & Escudero J. 2017. Determinación de tierras raras en muestras minerales mediante ICP-OES previa separación con resina de intercambio catiónico y validación de la metodología. REMETALLICA, Universidad de Santiago de Chile. Vol. 33 (Nº 21): 3-10.
Webster, J.R. & Gilstrap, M.S. 1990. Matrix-independent separation of rare-earth elements and yttrium from geological materials using constant calcium content-oxalate precipitation and cation exchange for determination by high-resolution inductively coupled plasma atomic emission spectrometry (ICP-AES).Chemical Geology. 85: 287-294. Elsevier Science Publishers B.V. Amsterdam