Banca de QUALIFICAÇÃO: VICTOR GABRIEL DE PAULA SAIDE

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : VICTOR GABRIEL DE PAULA SAIDE
DATA : 12/12/2019
HORA: 09:00
LOCAL: Pavilhão da Química, Sala 50
TÍTULO:

SEM / EDS and multivariate exploratory methods for the classification of gunshot residue (GSR) from projectiles used and seized by the Polícia Civil do Estado do Rio de Janeiro

PALAVRAS-CHAVES:

balistics, forensic chemistry, SIMCA, PCA, HCA

PÁGINAS: 17
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Analítica
ESPECIALIDADE: Métodos Óticos de Análise
RESUMO:

Firearm shots leave gunshot residue (GSR) on the firearm, the crime scene, the body and clothing of the shooter, and people close to the shooting location. In order for unfair convictions to occur less frequently, it is necessary to correlate the projectile found at the crime scene with the suspect or at least to determine whether the suspect has fired a gun. In this project will be used scanning electron microscopy (SEM) coupled to Dispersive Energy X-ray Spectroscopy (EDS) for analysis of these GSR. This technique is non-destructive, fast and presents chemical information related to the organic and inorganic constituents of the GSR that will be obtained. To perform this correlation and to recognize the standards in the GSR analyzed by SEM / EDS will be used exploratory chemometric methods (Principal Component Analysis - PCA and Hierarchical Cluster Analysis - HCA). Based on the results obtained by the exploratory methods, a SIMCA (Soft Independent Modeling Class Analogy) model will be built to classify the GSR of different projectiles and determine their origin. Cartridges will be used from the Brazilian Cartridge Company (CBC), of different years and lots, from Israel Military Industries (IMI), Federal Cartridge (FC) and Fray Luiz Beltran (FLB). By analysis / classification, if, in the event of any confrontation, these results can be used to identify which manufacturer fits the residue of the firing analyzed. It will also be performed analysis of firing residues from clean range projectiles (unleaded, barium and antimony) from the hand of snipers and non-snipers, searching for new elements for their classification, using the spectral data in conjunction with the chemometric analyzes cited. . Therefore, this project aims to create a GSR database of projectiles used and seized by the Polícia Civil do Estado do Rio de Janeiro (PCERJ) and also differentiate shooters and non-shooters through the use of organic (scatter) and inorganic spectral data.

MEMBROS DA BANCA:
Interna - 2975644 - VANESSA GOMES KELLY ALMEIDA
Interno - 1475121 - MARCELO HAWRYLAK HERBST
Externo ao Programa - 2630672 - FLAVIO COUTO CORDEIRO