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Applications of UV/VIS: Microspectrophotometry and Microspectrofluorimetry in Document Examination

NCJ Number
174922
Journal
International Journal of Forensic Document Examiners Volume: 3 Issue: 1 Dated: January-March 1997 Pages: 14-30
Author(s)
U Seipp
Date Published
1997
Length
17 pages
Annotation
Microspectrophotmetry is discussed with respect to its usefulness for differentiating and classifying dyes on questioned documents, with emphasis on its increased usefulness when the UV-region is involved.
Abstract
The microspectrophotometer is a combination of a microscope with spectrophotometric measuring techniques. The use of this technique involves little or no destruction of the materials involved. Experiments conducted to determine its usefulness in analyzing ballpoint inks and color-copying toners revealed that the content of the information of absorption-spectra increases significantly when the UV-region is included. Beyond this, the possibility to measure IR-luminescence spectra leads to more detailed information and a better understanding of a routine method in examinations of questioned documents. Figures, tables, and 26 reference notes (Author abstract modified)

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