Determination of arsenic, antimony and bismuth in rocks using optical emission spectrometry with inductively coupled plasma source (ICP-OES) and generation of hydride.
Authors
Elisa Moura Borges
Programa de Pós-Graduação em Geologia Regional, IGCE - Instituto de Geociências e Ciências Exatas UNESP Universidade Estadual Paulista campus de Rio Claro
Antonio José Ranalli Nardy
DPM Departamento de Petrologia e Metalogenia, IGCE - Instituto de Geociências e Ciências Exatas UNESP Universidade Estadual Paulista campus de Rio Claro
Mirtis Irene Ariza Malagutti
DGA Departamento de Geologia Aplicada, IGCE - Instituto de Geociências e Ciências Exatas UNESP Universidade Estadual Paulista campus de Rio Claro
Keywords:
Arsênio, antimônio, bismuto, geração de hidretos, ICP-OES
Abstract
This study describe a method for determination of arsenic, antimony and bismuth in geological materials, with the use of hydride generation and ICP-OES, that provide accurate results for elements in concentrations bellow 1 ppm. The method is sensitive and, consequently, it is subject to interferences by elements of the matrix. An efficient technique of dissolution were developed, and many treatments were accomplished with the addition of standard and tests with the use of thiourea and KI with acid ascorbic in different concentrations with order to minimize possible interferences from matrix elements. The final results in the determination of arsenic, antimony and bismuth, obtained with dissolution of international reference geologic materials, presented more than 97% recovery in samples with concentrations bellow 1 ppm.
Author Biographies
Elisa Moura Borges, Programa de Pós-Graduação em Geologia Regional, IGCE - Instituto de Geociências e Ciências Exatas UNESP Universidade Estadual Paulista campus de Rio Claro
Antonio José Ranalli Nardy, DPM Departamento de Petrologia e Metalogenia, IGCE - Instituto de Geociências e Ciências Exatas UNESP Universidade Estadual Paulista campus de Rio Claro
