1,8-diazafluoren-9-imine (DFI) as a Novel Amino Acid Fingermark Enhancement Reagent

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dc.contributor.advisor Miskelly, G en
dc.contributor.author Jones, Lydia en
dc.date.accessioned 2017-09-04T02:12:51Z en
dc.date.issued 2017 en
dc.identifier.uri http://hdl.handle.net/2292/35475 en
dc.description Full text is available to authenticated members of The University of Auckland only. en
dc.description.abstract 1,8-diazafluoren-9-one (DFO) and 1,2-indanedione (IND) are well established latent fingermark enhancement reagents that develop fingermarks on porous surfaces. They produce fluorescent fingermarks that are easy to visualise on coloured or patterned substrates. 1,8-diazafluoren-9-imine (DFI) is a primary imine derivative of DFO, which has shown potential for fingermark enhancement. This research investigated whether DFI could be used as an effective amino acid enhancement reagent for latent fingermarks on porous surfaces. The research was aimed at improving the understanding of DFI, for characterisation of its behaviour in both suspension and solution, while also testing it on real world samples. Enhancement of fingermarks on thermally sensitive paper using suspensions of DFI or DFO in HFE-7100 without applied heat was investigated, and DFI was shown to be superior to DFO in this application. DFI was then compared to both DFO and IND for fingermark enhancement on a range of porous substrates typical of casework (copy paper, newsprint, envelopes) using optimal solvent systems containing Zn2+ and with post-treatment heating. All samples for both experiments were aged for either 1, 7, 31, or 61 days. The enhanced fingermarks were compared using split comparison analysis with a three series depletion, with analysis carried out using the University of Canberra (UC) grading scale. The comparisons showed that DFI was not a superior fingermark enhancement reagent compared to DFO or IND in the chosen solvent systems. These results indicate that the DFI suspension should be further investigated, and that it may be a useful method to develop fingermarks on difficult, thermally-sensitive substrates. The Zn2+-containing DFI working solution requires further optimisation, as it has been shown to work as an enhancement reagent but not to surpass DFO or IND. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA99265070605902091 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights Restricted Item. Available to authenticated members of The University of Auckland. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ en
dc.title 1,8-diazafluoren-9-imine (DFI) as a Novel Amino Acid Fingermark Enhancement Reagent en
dc.type Thesis en
thesis.degree.discipline Forensic Science en
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.rights.holder Copyright: The author en
pubs.elements-id 657497 en
pubs.record-created-at-source-date 2017-09-04 en

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