The identification of dyes is important in research on museum artefacts as well as in forensic applications. UV-visible
absorption spectroscopy cannot unambiguously distinguish dyes with similar hues, while mass spectrometry may fail to
distinguish isobaric dyes. The detailed patterns produced by 3D fluorescence spectroscopy appear to be virtually unique,
even among dyes that are closely related positional isomers. We report these patterns for 65 dyes from the Schweppe
Library of Synthetic Organic Dyes as well as measurements suggesting both the capabilities and limitations of this
method.
Keywords: Fluorescence; Spectrophotometry; Dye Analysis; MALDI-TOF; Mass Spectrometry