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Determination of Indium and Tellurium in Fifty Nine Geological Reference Materials by Solvent Extraction and Graphite Furnace Atomic Absorption Spectrometry
Author(s) -
Terashima Shigeru
Publication year - 2001
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.2001.tb00791.x
Subject(s) - graphite furnace atomic absorption , methyl isobutyl ketone , aqua regia , tellurium , chemistry , indium , extraction (chemistry) , atomic absorption spectroscopy , absorbance , detection limit , palladium , graphite , analytical chemistry (journal) , iodide , mass spectrometry , matrix (chemical analysis) , solvent , inorganic chemistry , environmental chemistry , chromatography , biochemistry , physics , organic chemistry , quantum mechanics , catalysis , metal
The indium (In) and tellurium (Te) contents of fifty nine geological reference materials, issued by several reference material producers (USGS, CRPG, ANRT, GIT‐IWG and GSJ) have been determined by graphite furnace atomic absorption spectrometry, after aqua regia and HF digestion, and extraction of iodide complexes with trioctylmethylammonium (TOMA) ‐ metyl isobutyl ketone (MIBK). Although the interferences from most elements can be minimised by the addition of palladium solution as the matrix modifier, large concentrations of Bi, Cu, Pb or Sn suppress the absorbance of In and/or Te. Samples for analysis were therefore restricted to those in which the concentrations of these interfering elements did not cause a significant interference. The limit of detection was 0.2 ng g −1 In and Te for 1 g test portions. The agreement between the reported results and published data is satisfactory.