MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Determination of Trace Elements in High-Purity Molybdenum by Solid-Phase Extraction/ICP-MS
Shin-ichi HasegawaHitoshi YamaguchiKatsura YamadaTakeshi Kobayashi
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2004 Volume 45 Issue 3 Pages 925-929

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Abstract

We attempted a simple pretreating method consisting of solid-phase extraction using bonded silica gel with benzenesulfonic acid (SCX) as the solid-phase sorbent to determine trace elements in pure molybdenum samples by means of inductively coupled plasma mass spectrometry (ICP-MS). Molybdenum was anionized by adding hydrogen peroxide solution to a sample decomposed with acid, and separated from cation trace impurities that had been kept in the chemically bonded silica gel of the ion-exchange type. The target elements retained in the solid phase were eluted with a small amount of dilute nitric acid. In this method, some trace elements, such as Be, Al, Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Cd, In, Tl, Pb and Bi were determined by ICP-MS using the eluate. The detection limitations (3σ), as follows: Be 0.028, Al 2.64, Mg 1.9, Cr 0.20, Mn 0.13, Fe 3.85, Co 0.019, Ni 0.48, Cu 0.084, Zn 0.25, Ga 0.092, Cd 0.014, In 0.059, Tl: 0.027, Pb 0.044 and Bi 0.012 ng/g (ppb).

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© 2004 The Japan Institute of Metals and Materials
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