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Analysis of Titanium Dioxide in Synthetic Fibers Using Raman Microspectroscopy

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Abstract:

The ability of Raman microspectroscopy to distinguish between rutile and anatase forms of the inorganic pigment titanium dioxide (TiO2) and to make quantitative measurements of titania loading in fibers is demonstrated. Issues that affect the validity of the Raman measurements include the spatial heterogeneity of TiO2 in the fiber, the polarization of the laser beam, and the polarizing properties of the fiber itself. The amount of titanium dioxide in single delustered polyamide fibers was quantitated at concentration levels ranging from 0 to 7.1% TiO2. Fiber polarization and orientation effects were shown to be minimized by scrambling the polarization of the laser.

Keywords: DA; DISCRIMINANT ANALYSIS; MICROSPECTROSCOPY; PARTIAL LEAST SQUARES; PLS; RAMAN; SYNTHETIC FIBERS; TITANIUM DIOXIDE

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370209787944389

Affiliations: 1: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208 2: FBI Laboratory, Counterterrorism & Forensic Science Research Unit, FBI Academy, Quantico, Virginia 22135; Department of Chemistry/Biochemistry, Suffolk University, 41 Temple Street, Boston, MA 02114-4280

Publication date: April 1, 2009

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