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Abstract

A simple method has been developed that allows a fast determination of the homogeneity of an element M in an alloy, even for minor components. This is done by measuring a ratio of Ion currents I, IM/IM'O, whereby M' is the matrix element, by inductively coupled plasma mass spectrometry (ICP-MS).

In this work the homogeneity of a niobium - 0.1% zirconium alloy was detemined on 1mg samples. Accurate weighing of these small samples are not required, as the method is based on the measurement of the nobium/zirconium amount ration in the dissolved samples. As this ratio is fairly large, the Zr/ NbO amount ratio in the dissolved samples. As this ratio is fairly large, the Zr/NbO amount ratio was measured instead, to decrease the magnitude of the measured ratio. This ratio was found to be sufficiently stable over time to use for homogeneity testing . In this particular case the Zr/NbO ratio in the samples was found to vary by 0.049 relative for a 1 mg samples size. .

Additional information

Authors: HELD A, Institute for Reference Materials and Measurements, JRC Geel (BE);TAYLOR P, Institute for Reference Materials and Measurements, JRC Geel (BE);INGELBRECHT C, Institute for Reference Materials and Measurements, JRC Geel (BE)
Bibliographic Reference: Article: Fresenius Journal of Analytical Chemistry, 1998
Record Number: 199910252 / Last updated on: 1999-03-12
Category: PUBLICATION
Original language: en
Available languages: en