Volume 70, Issue 2 pp. 531-549
ORIGINAL PAPER

An alternative approach to the detection of latent fingermarks using [Eu2(BDC)3(H2O)2], a luminescent non-toxic MOF powder

André L. R. Talhari MSc

André L. R. Talhari MSc

LIMA, Instituto de Química, Universidade de Brasília-UnB, Brasília, Brazil

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Filipe G. M. Mauricio PhD

Filipe G. M. Mauricio PhD

LIMA, Instituto de Química, Universidade de Brasília-UnB, Brasília, Brazil

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Bruna R. B. Gomes PhD

Bruna R. B. Gomes PhD

LBQP, Instituto de Biologia, Universidade de Brasília-UnB, Brasília, Brazil

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Caroline R. Carneiro PhD

Caroline R. Carneiro PhD

LIMA, Instituto de Química, Universidade de Brasília-UnB, Brasília, Brazil

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Idio A. S. Filho PhD

Idio A. S. Filho PhD

LIMA, Instituto de Química, Universidade de Brasília-UnB, Brasília, Brazil

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Fabiane H. Veiga-Souza PhD

Fabiane H. Veiga-Souza PhD

LBQP, Instituto de Biologia, Universidade de Brasília-UnB, Brasília, Brazil

Faculdade de Ceilândia, Universidade de Brasília-UnB, Brasília, Brazil

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Ingrid T. Weber PhD

Corresponding Author

Ingrid T. Weber PhD

LIMA, Instituto de Química, Universidade de Brasília-UnB, Brasília, Brazil

Correspondence

Ingrid T. Weber, LIMA, Instituto de Química, Universidade de Brasília-UnB, 70904-970, Brasília, DF, Brazil.

Email: [email protected]

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First published: 16 January 2025

Presented in part at the 2023 InterForensics Conference, August 28-31, 2023, in Brasilia, Brazil; and at the XXI Brazilian Materials Research Society Meeting, October 1-5, 202, in Maceió, Alagoas, Brazil.

Abstract

Fingermarks are important forensic evidence for identifying people. In this work, luminescent MOF [Eu2(BDC)3(H2O)2] (herein referred as EuBDC) was tested as a potential latent fingermark (LF) luminescent developer powder and its acute toxicity evaluated following OECD protocol 423. The results showed that the powder can develop groomed LF on materials such as leather, plastic, metal, glass, cardboard, and aluminum. LFs aged up to 30 days, left on glass slides were developed and classified as level-3. The images presented high quality, enabling correct donor identification as well as through an Automated Fingerprint Identification System (AFIS) search. EuBDC also showed useful results as secondary technique for fixed cyanoacrylate LFs, especially on a reflective, multicolored and non-flat surfaces. Additionally, the EuBDC was tested on ungroomed fingermarks, developed on a split depletion series of successive deposits and compared to a commercially available luminescent powder. Development also occurred on ungroomed aged fingermarks; as a secondary technique for cyanoacrylate fuming; and on transparent adhesive tape when used as a suspension for the latter. Considering that development powders are frequently handled by Papilloscopists and that this may pose a health risk, the acute toxicity and of EuBDC and histopathological analysis were evaluated. The tests showed no signs of toxicity. Therefore, the EuBDC was classified in category 5 in the Globally Harmonized System classification, the least toxic category, with an LD50 >5000 mg/Kg. The set of results shows that EuBDC powder has the potential use as a fingermark developer, as well as being suitable for applications for non-toxic material.

CONFLICT OF INTEREST STATEMENT

The authors have no conflicts of interest to declare.

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