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Storage effects on ninhydrin-developed fingerprints enhanced by zinc complexation
Institution:1. Istituto di Chimica, Universitá ‘La Sapienza’, Roma, Italy;2. SIVA SpA, Centro Tecnico Industriale, Via Salaria, 971 — 00138 Roma, Italy;3. Istituto di Medicina Legale, Università Cattolica S. Cuore, Roma, Italy;1. Department of Physics, Government Science College, NT Road, Bangalore 560 001, India;2. Research and Development Center, Bharathiar University, Coimbatore 641 046, India;3. Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur 572 103, India;4. Department of Physics, Acharya Institute of Graduate Studies, Bangalore 560 107, India;5. Department of Physics, B.M.S. Institute of Technology and Management, Visveswaraya Technological University affiliated, Bangalore 560064, India;6. Department of Mechanical Engineering, Jain University, Jain Group of Institutions, Bangalore 560 069, India;7. Avinashilingam Institute for Home Science and Higher Education University for Women, Coimbatore 6410 43, India;8. Department of Physics, HMS Institute of Technology, VTU Affiliation, Tumkur 572 104, India;1. School of Investigation, People’s Public Security University of China, Beijing 100038, China;2. Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China;3. SCIEX Asia Pacific Application Support Center, Beijing 100015, China;1. Department of Physics, Govt. Science College, Bangalore 560 001, India;2. Research and Development Center, Bharathiar University, Coimbatore 641046, India;3. Prof. C.N.R. Rao Centre for Advanced Materials, Tumakuru University, Tumakuru 572103, India;4. Department of Physics, Acharya Institute of Graduate Studies, Bangalore 560 107, India;5. Department of Physics, BMS Institute of Technology, VTU-Affiliated, Bangalore 560 064, India;1. Reparto Carabinieri Investigazioni Scientifiche (R.I.S.), Messina, Italy;2. National Crime Agency (NCA), London, United Kingdom;3. Bunderskriminalamt (BKA), Wiesbaden, Germany;4. National Forensic Centre (NFC), Linkoping, Sweden;5. Home Office, London, United Kingdom;6. Reparto Carabinieri Investigazioni Scientifiche (R.I.S.), Parma, Italy
Abstract:A study has been made of the effects of storage on the fluorescence of latent fingermarks on paper developed with ninhydrin and zinc chloride. Exposure to sunlight or xenon arc light causes fading of the marks but the presence of moisture or high humidity results in the loss of fluorescence and the formation of a red non-fluorescent compound.
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