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Secondary ion mass spectrometry for the identification of polymers with noncharacteristic secondary ions using multivariate statistical analysis

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4 Author(s)
van Gennip, W.J.H. ; Dutch Polymer Institute, Department of Physical Chemistry of Surfaces, HEW 3.48, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands ; Thune, P.C. ; Dijkstra, J.B. ; Niemantsverdriet, J.W.

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Eleven different, filler-free polymers were depth profiled until all secondary ion signals were stable. Discriminant function analysis and principal components analysis were performed on a dataset containing the intensities of noncharacteristic hydrocarbon secondary ions, measured in this steady state. Discriminant function analysis showed that these secondary ions were sufficient to correctly identify all polymers using leave-one-out correction. Even with principal components analysis, which uses no prior knowledge about the origin of a data point, identification was shown to be possible. © 2004 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:84 ,  Issue: 10 )

Date of Publication:

Mar 2004

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