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Part
I. Physics and Chemistry of Borate Fusion, by Fernand
Claisse, 78 pp. |
Personal interpretations of the author who made the first
fused bead for XRF analysis. His views are based on simple
scientific concepts and are expressed in simple terms.
Content: Structure of borate glass. Neutrality and acidity.
Solubility of oxides. Retention of sulfur. Optimal flux
for a given sample. Crystallization of beads. Sticking
to crucibles and moulds. Understanding releasing agents,
etc. |
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Part
II. Fusion procedures, 6 pp. |
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A short description of fusion procedures for beginners.
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Part
III. Borate Fusion of Metals and Alloys - Theory and
Application, by Jimmy S. Blanchette, 20 pp. |
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For decades, metals have represented a significant challenge
to the XRF community. Most of solid metal samples are
not homogeneous, and their XRF intensities are affected
by grain size. The author has opened a new important field
of application, by oxidizing metallic samples in the fusion
crucible near room temperature, before applying the fusion
process. The oxidation procedures are easy and quick,
thus allowing metal samples to be prepared as fused beads,
and analyzed as accurately as oxides. |
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Part
IV. Iteration of the Sherman equation, the way to
go, by Fernand Claisse, 11 pp. |
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Description
and features of a new generation of Fundamental Parameter
programs for the correction of matrix effects, in which
no influence coefficients are used, and no normalization
of calculated concentrations is made. This program is
particularly interesting for fused beads. (XRF
Direct Software)
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