Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UEPB |
Texto Completo: | http://tede.bc.uepb.edu.br/jspui/handle/tede/3838 |
Resumo: | A homemade mixture of organic solvents, known in Brazil as “loló”, stands out among the most misused inhalant substances in this country. Traditionally, it was composed of ether and chloroform, however, reports in the literature and practice of criminal expertise reveal changes in the composition profile of this drug, impacting the efficiency of preliminary tests used for immediate detection of illicit substances in order to produce the necessary evidence to support police actions, such as arrests. Considering the diversity of volatile substances with potential misuse and the limited detection of preliminary tests routinely used by forensic laboratories, this study aimed to employ NIR spectroscopy associated with chemometric models to detect organic solvents in samples of “loló” as alternative to the methods commonly used in forensic laboratories. A survey was carried out to know the composition profile of the seized samples in the geographic region studied (State of Paraíba) in order to direct the design of synthetic mixtures used in the construction of classification models. In addition to synthetic samples, real samples duly characterized by GC-MS were used to compose sample sets. Then, an analysis protocol was developed, based on SIMCA models, to detect the prevalent solvents in the regional composition profile obtained (dichloromethane, trichlorethylene and chloroform). The proposed analysis protocol obtained an accuracy of 94.7% in detecting halogenated hydrocarbons in suspect samples and 100% accuracy in characterizing the composition of samples composed exclusively of the studied halogenated hydrocarbons and their binary mixtures. Considering that the colorimetric tests used in the routine for detecting halogenated hydrocarbons do not detect dichloromethane, the most prevalent solvent among those studied, the proposed method proved to be technically and economically feasible in preliminary tests for seized samples suspected to contains these solvents. |
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Veras Neto, José Germano95420614472http://lattes.cnpq.br/2790322814354811Veras Neto, José Germano95420614472http://lattes.cnpq.br/2790322814354811Honorato, Ricardo Saldanha72708271415http://lattes.cnpq.br/6991802488982626Fernandes, Felipe Hugo Alencar07702696486http://lattes.cnpq.br/4457286315796223Portela, Alyne da Silva04518638441http://lattes.cnpq.br/025286336680032201326269500http://lattes.cnpq.br/0875994511218053Nogueira, Rômulo Guimarães2021-11-23T13:53:21Z2999-12-312021-05-31NOGUEIRA, R. G. Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria. 2021. 70f. Dissertação (Programa de Pós-Graduação em Ciências Farmacêuticas - PPGCF) - Universidade Estadual da Paraíba, Campina Grande, 2021.http://tede.bc.uepb.edu.br/jspui/handle/tede/3838A homemade mixture of organic solvents, known in Brazil as “loló”, stands out among the most misused inhalant substances in this country. Traditionally, it was composed of ether and chloroform, however, reports in the literature and practice of criminal expertise reveal changes in the composition profile of this drug, impacting the efficiency of preliminary tests used for immediate detection of illicit substances in order to produce the necessary evidence to support police actions, such as arrests. Considering the diversity of volatile substances with potential misuse and the limited detection of preliminary tests routinely used by forensic laboratories, this study aimed to employ NIR spectroscopy associated with chemometric models to detect organic solvents in samples of “loló” as alternative to the methods commonly used in forensic laboratories. A survey was carried out to know the composition profile of the seized samples in the geographic region studied (State of Paraíba) in order to direct the design of synthetic mixtures used in the construction of classification models. In addition to synthetic samples, real samples duly characterized by GC-MS were used to compose sample sets. Then, an analysis protocol was developed, based on SIMCA models, to detect the prevalent solvents in the regional composition profile obtained (dichloromethane, trichlorethylene and chloroform). The proposed analysis protocol obtained an accuracy of 94.7% in detecting halogenated hydrocarbons in suspect samples and 100% accuracy in characterizing the composition of samples composed exclusively of the studied halogenated hydrocarbons and their binary mixtures. Considering that the colorimetric tests used in the routine for detecting halogenated hydrocarbons do not detect dichloromethane, the most prevalent solvent among those studied, the proposed method proved to be technically and economically feasible in preliminary tests for seized samples suspected to contains these solvents.O “cheirinho de loló” se destaca entre as drogas inalantes mais usadas no Brasil. Trata-se de misturas de solventes orgânicos, tradicionalmente éter e clorofórmio, no entanto, relatos na literatura e a prática pericial revelam mudanças no perfil de composição desta droga, repercutindo na eficiência dos exames preliminares utilizados na detecção de substâncias ilícitas em situações que exigem rápido tempo de resposta da perícia criminal, a exemplo de prisões em flagrante. Considerando a diversidade de voláteis com potencial uso como drogas inalantes e o limitado espectro de substâncias detectadas pelos exames preliminares rotineiramente utilizados por laboratórios forenses, este trabalho teve como objetivo o emprego da espectroscopia NIR associada a modelos quimiométricos para detectar a presença de solventes orgânicos em amostras de “loló”. Inicialmente, fez-se o levantamento do perfil químico das amostras aprendidas na região geográfica de estudo (Paraíba) e a partir da constatação das substâncias prevalentes, foram produzidos modelos de classificação com uso de amostras produzidas em laboratório e amostras de apreensões reais. Em seguida, foi desenvolvido um protocolo de análise, baseado no método de classificação SIMCA, para detecção dos solventes predominantes no perfil de composição regional obtido (diclorometano, tricloroetileno e clorofórmio). O protocolo de análise proposto obteve exatidão global de 94,7% na detecção de hidrocarbonetos halogenados e exatidão de 100% na caracterização da composição de amostras compostas exclusivamente pelos hidrocarbonetos halogenados estudados e suas misturas binárias. Considerando que os exames colorimétricos utilizados na rotina não detectam o diclorometano, solvente mais prevalente entre os estudados, o método proposto apresentou-se técnica e economicamente viável em exames preliminares para amostras apreendidas suspeitas de “loló”.Submitted by Concluintes Mestrado (concluinte.mestrado@setor.uepb.edu.br) on 2021-06-25T01:00:12Z No. of bitstreams: 3 Dissertação de Mestrado ROMULO versão pós defesa_.pdf: 1541645 bytes, checksum: 342da868284315e2d0d9b070481779a4 (MD5) Termo-de-confirmacao-e-cadastramento-para-publicacao-de-TDE-da-BDTD_Modeloatual.pdf: 117029 bytes, checksum: 992a3d49b521e3d103945bbc5bbc6d6e (MD5) Termo-de-autorizacao-de-insercao-de-tese-ou-dissertacao-no-Sistema-TEDE-da-BDTD_.pdf: 82192 bytes, checksum: 4b2b2050e5eae7d124e79c8ce2ae8d3e (MD5)Approved for entry into archive by Jean Medeiros (jeanletras@uepb.edu.br) on 2021-06-25T13:10:54Z (GMT) No. of bitstreams: 3 Dissertação de Mestrado ROMULO versão pós defesa_.pdf: 1541645 bytes, checksum: 342da868284315e2d0d9b070481779a4 (MD5) Termo-de-confirmacao-e-cadastramento-para-publicacao-de-TDE-da-BDTD_Modeloatual.pdf: 117029 bytes, checksum: 992a3d49b521e3d103945bbc5bbc6d6e (MD5) Termo-de-autorizacao-de-insercao-de-tese-ou-dissertacao-no-Sistema-TEDE-da-BDTD_.pdf: 82192 bytes, checksum: 4b2b2050e5eae7d124e79c8ce2ae8d3e (MD5)Made available in DSpace on 2021-11-23T13:53:21Z (GMT). No. of bitstreams: 3 Dissertação de Mestrado ROMULO versão pós defesa_.pdf: 1541645 bytes, checksum: 342da868284315e2d0d9b070481779a4 (MD5) Termo-de-confirmacao-e-cadastramento-para-publicacao-de-TDE-da-BDTD_Modeloatual.pdf: 117029 bytes, checksum: 992a3d49b521e3d103945bbc5bbc6d6e (MD5) Termo-de-autorizacao-de-insercao-de-tese-ou-dissertacao-no-Sistema-TEDE-da-BDTD_.pdf: 82192 bytes, checksum: 4b2b2050e5eae7d124e79c8ce2ae8d3e (MD5) Previous issue date: 2021-05-31application/pdfporUniversidade Estadual da ParaíbaPrograma de Pós-Graduação em Ciências Farmacêuticas - PPGCFUEPBBrasilPró-Reitoria de Pós-Graduação e Pesquisa - PRPGPInalantesQuimiometriaReconhecimento de padrõesDrogas ilíciasPattern RecognitionChemometricsInhalantsIllicit DrugCIENCIAS DA SAUDE::FARMACIADesenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometriaApplications of NIR spectroscopy and chemometrics on illicit drug analysis: a example on inhalant drug screening tests.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis81579685552518768746006006005248714503811102786997636413449754996info:eu-repo/semantics/embargoedAccessreponame:Biblioteca Digital de Teses e Dissertações da UEPBinstname:Universidade Estadual da Paraíba (UEPB)instacron:UEPBLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
dc.title.alternative.eng.fl_str_mv |
Applications of NIR spectroscopy and chemometrics on illicit drug analysis: a example on inhalant drug screening tests. |
title |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
spellingShingle |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria Nogueira, Rômulo Guimarães Inalantes Quimiometria Reconhecimento de padrões Drogas ilícias Pattern Recognition Chemometrics Inhalants Illicit Drug CIENCIAS DA SAUDE::FARMACIA |
title_short |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
title_full |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
title_fullStr |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
title_full_unstemmed |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
title_sort |
Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria |
author |
Nogueira, Rômulo Guimarães |
author_facet |
Nogueira, Rômulo Guimarães |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Veras Neto, José Germano |
dc.contributor.advisor1ID.fl_str_mv |
95420614472 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/2790322814354811 |
dc.contributor.referee1.fl_str_mv |
Veras Neto, José Germano |
dc.contributor.referee1ID.fl_str_mv |
95420614472 |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/2790322814354811 |
dc.contributor.referee2.fl_str_mv |
Honorato, Ricardo Saldanha |
dc.contributor.referee2ID.fl_str_mv |
72708271415 |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/6991802488982626 |
dc.contributor.referee3.fl_str_mv |
Fernandes, Felipe Hugo Alencar |
dc.contributor.referee3ID.fl_str_mv |
07702696486 |
dc.contributor.referee3Lattes.fl_str_mv |
http://lattes.cnpq.br/4457286315796223 |
dc.contributor.referee4.fl_str_mv |
Portela, Alyne da Silva |
dc.contributor.referee4ID.fl_str_mv |
04518638441 |
dc.contributor.referee4Lattes.fl_str_mv |
http://lattes.cnpq.br/0252863366800322 |
dc.contributor.authorID.fl_str_mv |
01326269500 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0875994511218053 |
dc.contributor.author.fl_str_mv |
Nogueira, Rômulo Guimarães |
contributor_str_mv |
Veras Neto, José Germano Veras Neto, José Germano Honorato, Ricardo Saldanha Fernandes, Felipe Hugo Alencar Portela, Alyne da Silva |
dc.subject.por.fl_str_mv |
Inalantes Quimiometria Reconhecimento de padrões Drogas ilícias |
topic |
Inalantes Quimiometria Reconhecimento de padrões Drogas ilícias Pattern Recognition Chemometrics Inhalants Illicit Drug CIENCIAS DA SAUDE::FARMACIA |
dc.subject.eng.fl_str_mv |
Pattern Recognition Chemometrics Inhalants Illicit Drug |
dc.subject.cnpq.fl_str_mv |
CIENCIAS DA SAUDE::FARMACIA |
description |
A homemade mixture of organic solvents, known in Brazil as “loló”, stands out among the most misused inhalant substances in this country. Traditionally, it was composed of ether and chloroform, however, reports in the literature and practice of criminal expertise reveal changes in the composition profile of this drug, impacting the efficiency of preliminary tests used for immediate detection of illicit substances in order to produce the necessary evidence to support police actions, such as arrests. Considering the diversity of volatile substances with potential misuse and the limited detection of preliminary tests routinely used by forensic laboratories, this study aimed to employ NIR spectroscopy associated with chemometric models to detect organic solvents in samples of “loló” as alternative to the methods commonly used in forensic laboratories. A survey was carried out to know the composition profile of the seized samples in the geographic region studied (State of Paraíba) in order to direct the design of synthetic mixtures used in the construction of classification models. In addition to synthetic samples, real samples duly characterized by GC-MS were used to compose sample sets. Then, an analysis protocol was developed, based on SIMCA models, to detect the prevalent solvents in the regional composition profile obtained (dichloromethane, trichlorethylene and chloroform). The proposed analysis protocol obtained an accuracy of 94.7% in detecting halogenated hydrocarbons in suspect samples and 100% accuracy in characterizing the composition of samples composed exclusively of the studied halogenated hydrocarbons and their binary mixtures. Considering that the colorimetric tests used in the routine for detecting halogenated hydrocarbons do not detect dichloromethane, the most prevalent solvent among those studied, the proposed method proved to be technically and economically feasible in preliminary tests for seized samples suspected to contains these solvents. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-11-23T13:53:21Z |
dc.date.issued.fl_str_mv |
2021-05-31 |
dc.date.available.fl_str_mv |
2999-12-31 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
NOGUEIRA, R. G. Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria. 2021. 70f. Dissertação (Programa de Pós-Graduação em Ciências Farmacêuticas - PPGCF) - Universidade Estadual da Paraíba, Campina Grande, 2021. |
dc.identifier.uri.fl_str_mv |
http://tede.bc.uepb.edu.br/jspui/handle/tede/3838 |
identifier_str_mv |
NOGUEIRA, R. G. Desenvolvimento de método para identificação de droga inalante em perícia criminal por espectroscopia NIR e quimiometria. 2021. 70f. Dissertação (Programa de Pós-Graduação em Ciências Farmacêuticas - PPGCF) - Universidade Estadual da Paraíba, Campina Grande, 2021. |
url |
http://tede.bc.uepb.edu.br/jspui/handle/tede/3838 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
8157968555251876874 |
dc.relation.confidence.fl_str_mv |
600 600 600 |
dc.relation.department.fl_str_mv |
524871450381110278 |
dc.relation.cnpq.fl_str_mv |
6997636413449754996 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual da Paraíba |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciências Farmacêuticas - PPGCF |
dc.publisher.initials.fl_str_mv |
UEPB |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Pró-Reitoria de Pós-Graduação e Pesquisa - PRPGP |
publisher.none.fl_str_mv |
Universidade Estadual da Paraíba |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da UEPB instname:Universidade Estadual da Paraíba (UEPB) instacron:UEPB |
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Biblioteca Digital de Teses e Dissertações da UEPB |
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Biblioteca Digital de Teses e Dissertações da UEPB - Universidade Estadual da Paraíba (UEPB) |
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