New application of microwave digestion-inductively coupled plasma-mass spectrometry for multi-element analysis in komatiites

Research areas:
Year:
2008
Authors:
  • Delphine Nna Mvondo
  • Maria-Paz Martin-Redondo
  • Jesus Martinez-Frias
Journal:
ANALYTICA CHIMICA ACTA
Volume:
628
Number:
2
Pages:
133-142
Month:
NOV 3
ISSN:
0003-2670
BibTex:
Abstract:
A new method using microwave digestion combined with inductively coupled
plasma-mass spectrometry (ICP-MS) was studied to analyze the elemental
composition of a variety of komatiites samples. Microwave digestion
consisted in two-stage heating and pressurizing acid treatments for
maximum dissolution of the samples. We report here different quality
control measurements (external and internal calibration, monitoring of
reference materials) which involve standard deviation calculations and
recovery examinations in order to test the precision and accuracy of the
analytical procedure. Data for 17 elements (Na, P, K, T, V Cr, Mn, Co,
Ni, Cu, Zn, Zr, Pb, Al, F, Ca and Mg) in eight komatiite samples and two
USGS basalt reference samples (BCR-2 and BHVO-2) are presented. We
evaluate our new digestion and instrumental procedure. The element
concentration obtained for BCR-2 and BHVO-2 agreed well with the
certified values, the relative standard deviations were lower than 5\%
and recoveries were good. Our analytical results demonstrate that it
reproduces accurately the concentrations of minor and trace elements in
komatiites. The ease of digestion of the samples and the speed (less
than 12 h) to digest the komatiite material makes this technique an
efficient method to be used easily and routinely for preparing and
analyzing komatiites samples for multiple elements determination. (C)
2008 Elsevier B.V. All rights reserved.