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Ultratrace Analysis: Determination of Cr, Fe, and Co in the ppb and ppt Range for Checking the Preparation of High‐Purity Niobium
Author(s) -
Faix Werner G.,
Krivan Viliam,
Schulze Klaus
Publication year - 1980
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198001971
Subject(s) - niobium , radiochemistry , analytical chemistry (journal) , human decontamination , materials science , irradiation , detection limit , chemistry , nuclear chemistry , chromatography , metallurgy , nuclear physics , physics
The purest niobium to be obtained so far was produced in a three‐step process from commercial pure niobium and characterized by n‐activation analysis. In order to measure the Cr, Fe, and Co content, carrier elements were added to the sample after irradiation for 42 d and surface decontamination. After chemical separation, the three elements could be determined by gamma‐ray spectrometry (detection limits 10 ppt, 1.5 ppb, and 4.0 ppt, respectively). Concentration ranges in the five samples: Cr 10—24.7 ppt, Fe 2—6.6 ppb, Co 4—19.0 ppt.