title: On the autofluorescence of aged fingermarks.
abstract: Fingermark autofluorescence changes with time, both spectrally and in total intensity. In this study we investigate which components in the aged fingermarks cause this change in autofluorescent signal. Thin layer chromatography combined with fluorescence spectroscopy was used to identify fluorescent aging products. Based on our results, tryptophan derivatives, including indoleacetic acid, (nor)harman and xanthurenic acid are indicated as important contributors to the autofluorescence of aged fingermarks. Knowledge about which fluorescent aging products are present in fingermarks might be useful in the development of fingermark age estimation methods. This work is part of a larger project of which the major goal is to develop a method to estimate the time of deposition of fingermarks. Additionally, by selective targeting of aging products the development of aged fingermarks might be improved.
authors.affiliation: Department of Biomedical Engineering and Physics University of Amsterdam, Academic Medical Center Meibergdreef 9, 1105, AZ Amsterdam, The Netherlands.
authors.forename: Annemieke
authors.initials: A
authors.lastname: van Dam
authors.affiliation: Department of Biomedical Engineering and Physics University of Amsterdam, Academic Medical Center Meibergdreef 9, 1105, AZ Amsterdam, The Netherlands.
authors.forename: Maurice C G
authors.initials: MC
authors.lastname: Aalders
authors.affiliation: Institute fur Bioanalytische Chemie Bioanalytik, Biotechnologisch-Biomedizinisches Zentrum, Fakultät für Chemie und Mineralogie, Universität Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany.
authors.forename: Toni
authors.initials: T
authors.lastname: Todorovski
authors.affiliation: Department of Biomedical Engineering and Physics University of Amsterdam, Academic Medical Center Meibergdreef 9, 1105, AZ Amsterdam, The Netherlands.
authors.forename: Ton G
authors.initials: TG
authors.lastname: van Leeuwen
authors.affiliation: Department of Biomedical Engineering and Physics University of Amsterdam, Academic Medical Center Meibergdreef 9, 1105, AZ Amsterdam, The Netherlands. Electronic address: s.a.g.lambrechts@gmail.com.
authors.forename: Saskia A G
authors.initials: SA
authors.lastname: Lambrechts
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry; D002243:Carbolines / Q000737:chemistry; D002725:Chloroform / Q000737:chemistry; D002855:Chromatography, Thin Layer; D003878:Dermatoglyphics; D005453:Fluorescence; D006801:Humans; D007202:Indicators and Reagents; D007210:Indoleacetic Acids / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013997:Time Factors; D014364:Tryptophan / Q000737:chemistry; D014977:Xanthurenates / Q000737:chemistry
chemical_list: D001547:Benzaldehydes; D002243:Carbolines; D007202:Indicators and Reagents; D007210:Indoleacetic Acids; D012997:Solvents; D014977:Xanthurenates; C028330:xanthurenic acid; C030737:indoleacetic acid; D002725:Chloroform; D014364:Tryptophan; C010262:norharman; C510241:p-dimethylaminobenzaldehyde; D000432:Methanol
keywords: Aging; Composition; Fingermarks; Fingerprint; Fluorescence; Luminescence; Tryptophan derivatives