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ASSESSMENT OF A SIMPLE METHOD FOR THE DETERMINATION OF NB AND TA AT THE SUB‐μG/G LEVEL IN SILICATE ROCKS BY ICP‐MS
Author(s) -
POITRASSON Franck,
PIN Christian,
TELOUK Philippe,
IMBERT Jean Louis
Publication year - 1993
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1993.tb00138.x
Subject(s) - silicate , calibration , inductively coupled plasma mass spectrometry , analytical chemistry (journal) , relative standard deviation , mass spectrometry , inductively coupled plasma , decomposition , detection limit , materials science , chemistry , mineralogy , plasma , chromatography , physics , nuclear physics , quantum mechanics , organic chemistry
We report Nb and Ta data for 15 international silicate rock standards, obtained by inductively coupled plasma‐mass spectrometry (ICP‐MS) measurement following decomposition with HF‐HNOs‐HCI. 95 Moand 185 Re were used as internal standards, and calibration lines were constructed with artificial solutions. Typical relative standard deviations are better than 10% above 0.2 μg/g, and detection limits for Nb and Ta are 40 and 0.8 ng/g, respectively. The results are generally in good agreement with published data. Moreover, this study points out the Nb‐Ta heterogeneity of some standard reference materials on the 100 mg scale.