Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2006-05-16
2008-12-09
Vanore, David A. (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S287000, C702S032000, C702S022000
Reexamination Certificate
active
07462819
ABSTRACT:
The present invention provides a method of analysis which couples principle component analysis (PCA) with ToF-SIMS for obtaining surface chemical information from minerals. Statistical methods, based on the monolayer-sensitive time of flight secondary ion mass spectrometry (ToF-SIMS) technique, combined with principal component analysis (PCA) identifies combinations of factors strongly correlated (positively or negatively) in images or spectra from sets of data. In images, PCA selects these correlations from the mass spectra recorded at each of 256×256 pixels in a selected area of particles. In the image mode, PCA provides a much better method of selecting particles by mineral phase with clearer definition of particle boundaries due to multi-variable recognition.
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Biesinger Mark Carl
Hart Brian Robert
Smart Roger St. C.
Hill & Schumacher
Schumacher Lynn C.
The University of Western Ontario
Vanore David A.
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