Single Fiber Identification with Nondestructive Excitation–Emission Spectral Cluster Analysis

Identification methods for single textile fibers are in demand for forensic applications, and nondestructive methods with minimal pretreatment have the greatest potential for utility. Excitation–emission luminescence data provide a three-dimensional matrix for comparison of single-fiber dyes, and th...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2014-07, Vol.86 (14), p.6774-6780
Main Authors: Appalaneni, Krishnaveni, Heider, Emily C, Moore, Anthony F. T, Campiglia, Andres D
Format: Article
Language:English
Subjects:
Analytical chemistry
Cluster analysis
Dyes
Fibers
Forensic engineering
Forensic sciences
Samples
Spectra
Statistical methods
Textile fibers
Three dimensional
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Summary:Identification methods for single textile fibers are in demand for forensic applications, and nondestructive methods with minimal pretreatment have the greatest potential for utility. Excitation–emission luminescence data provide a three-dimensional matrix for comparison of single-fiber dyes, and these data are enhanced by principal component analysis and comparison of fibers using a statistical figure of merit. No dye extraction methods are required to sample the spectra from a single fiber. This approach has been applied to the analysis of single fibers to compare closely matched dye pairs, acid blue (AB) 25 and 41 and direct blue (DB) 1 and 53. In all cases, the accuracy of fiber identification was high and no false positive identifications were made.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac500021h