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Latent Fingermark Development on a Range of Porous Substrates Using Ninhydrin Analogs—A Comparison with Ninhydrin and 1,8‐Diazofluoren
Author(s) -
Berdejo Stephanie,
Rowe Mark,
Bond John W.
Publication year - 2012
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/j.1556-4029.2011.01972.x
Subject(s) - ninhydrin , fluorescence , lawsone , reagent , yield (engineering) , chemistry , materials science , chromatography , organic chemistry , biochemistry , metallurgy , optics , physics , amino acid
Three relatively new reagents for developing latent fingermarks on porous substrates, 1,2‐indandione (IND), 5‐methylthioninhydrin (5‐MTN), and lawsone, are compared with the more widely used ninhydrin and 1,8‐diazofluoren (DFO). Developed latent fingermark visualization on 10 different substrates comprising colored papers, cardboard, and cellophane rather than conventional printer and writing/notepad paper is assessed using latent fingermark deposits from 48 donors. Results show improved fluorescent fingermark visualization using IND compared with DFO on a range of colored cardboards and thick white paper, thus extending the range of substrates known to yield improved visualization with IND. Adding zinc chloride to IND failed to yield any further improvement in fluorescent fingermark visualization. 5‐MTN (with and without zinc chloride posttreatment) showed no improvement in visualization compared with ninhydrin and DFO although visible fingermarks were developed. Lawsone produced fluorescent visible fingermarks only with white substrates, which were inferior to those produced with DFO.