Identification Using Classification Analysis of Flunitrazepam in Necrophagous Larvae via Differential Pulse Voltammetry and Fluorescence Excitation-Emission Matrix (EEM) Spectroscopy

Lima, Leomir A.S. de; Morais, Camilo L. M.; Jales, Jéssica T.; Gama, Renata Antonaci; Lemos, Sherlan G.; Lima, Kássio M. G.

doi:10.21577/0103-5053.20180139

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…Besides, the wavelengths 1617 and 1625 nm were characteristic bands of flunitrazepam and were also relevant in sample differentiation. De Lima et al (2018) [69], on the other hand, used pulse voltammetry spectroscopy to detect flunitrazepam in necrophagous Diptera larvae, reaching 78%–76% sensitivity to detect this forensic important compound.…”

Section: Resultsmentioning

confidence: 99%

Infrared spectroscopy and forensic entomology: Can this union work? A literature review

Jales

Barbosa

Medeiros

et al. 2021

Journal of Forensic Sciences

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For more than two decades, infrared spectroscopy techniques combined with multivariate analysis have been efficiently applied in several entomological fields, such as Taxonomy and Toxicology. However, little is known about its use and applicability in Forensic entomology (FE) field, with vibrational techniques such as Near-infrared spectroscopy (NIRS) and Medium-infrared spectroscopy (MIRS) underutilized in forensic sciences. Thus, this work describes the potential of NIRS, MIRS, and other spectroscopic methodologies, for entomological analysis in FE, as well as discusses its future uses for criminal or civil investigations. After a thorough research on scientific journals database, a total of 33 publications were found in scientific journals, with direct or indirect application to FE, including experimental applications of NIRS and MIRS in taxonomic discrimination of species, larval age prediction, detection of toxic substances in insects from environments or crime scenes, and detection of internal or external infestations by live or dead insects in stored products. Besides, NIRS and MIRS combined with multivariate analysis were efficient, inexpensive, fast, and nondestructive analytical tools. However, more than 51% of the spectroscopic publications are concentrated in the stored products field, and so we discuss the need for expansion and more direct application in other FE areas. We hope the number of articles continues to increase, and as NIRS and MIRS technology progress, they advance in forensic research and routine use.

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Section: Resultsmentioning

confidence: 99%

Infrared spectroscopy and forensic entomology: Can this union work? A literature review

Jales

Barbosa

Medeiros

et al. 2021

Journal of Forensic Sciences

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“…SVM is an efficient classification technique to build nonlinear discriminate models (Sebald and Bucklew, 2000; Polyak et al , 2007; de Lima et al , 2018). The coconut water samples in this study were provided by these companies (i.e.…”

Section: Methodsmentioning

confidence: 99%

Feasibility study for the analysis of coconut water using fluorescence spectroscopy coupled with PARAFAC and SVM methods

Liu

Huang

et al. 2020

BFJ

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PurposeParallel factor analysis (PARAFAC) coupled with support-vector machine (SVM) was carried out to identify and discriminate between the fluorescence spectroscopies of coconut water brands.Design/methodology/approachPARAFAC was applied to reduce three-dimensional data of excitation emission matrix (EEM) to two-dimensional data. SVM was applied to discriminate between six commercial coconut water brands in this study. The three largest variation data from fluorescence spectroscopy were extracted using the PARAFAC method as the input data of SVM classifiers.FindingsThe discrimination results of the six commercial coconut water brands were achieved by three SVM methods (Ga-SVM, PSO-SVM and Grid-SVM). The best classification accuracies were 100.00%, 96.43% and 94.64% for the training set, test set and CV accuracy.Originality/valueThe above results indicate that fluorescence spectroscopy combined with PARAFAC and SVM methods proved to be a simple and rapid detection method for coconut water and perhaps other beverages.

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“…y Cochliomyia macellaria) que contenían flunitrazepam. Concluyeron que DPV y EEM combinados con quimiometría podían usarse como herramientas para la clasificación de flunitrazepam en larvas de mosca (44).…”

Section: Técnicas De Análisis Toxicológico De La Entomofaunaunclassified

Entomotoxicología Forense En Cadáveres En Estado De Descomposición

Pozo¹

2021

TEJOM

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Resumen Introducción: la entomotoxicología se enfoca en la aplicación del análisis toxicológico a los insectos que se encuentran en los cadáveres, para identificar la presencia de drogas y toxinas en los tejidos o restos cadavéricos. Objetivo: realizar una revisión sobre la utilidad de la entomotoxicología como herramienta para las Ciencias Forenses, en cadáveres que se encuentran en estado de descomposición avanzada, cuando no es factible la recolección de muestras biológicas. Materiales y métodos: se realizó una búsqueda en Pubmed, Scopus, Scielo y Google Académico con las palabras clave: Forensic entomology / entomología forense, Forensic entomotoxicology / entomotoxicología forense, Criminology / criminología, Forensic toxicology / toxicología forense, Poisoning / envenenamiento y Postmortem interval determination / determinación del intervalo postmortem. Se incluyeron publicaciones de acceso libre, en español e inglés; publicados desde 1992 hasta marzo 2021. Resultados: la búsqueda inicial arrojó 3476 referencias (Pubmed: 50; Scopus: 402; Scielo: 114; Google académico: 2910). Quinientas sesenta y seis publicaciones fueron excluidas por duplicación; 49 fueron incluidas en esta revisión. Conclusiones: los insectos permiten un análisis fiable de toxinas y drogas cuando no es posible realizarlo directamente desde los restos cadavéricos. En Ecuador, se requieren estudios que indaguen la aplicación y desarrollo de esta rama para determinar su precisión y utilidad a nivel local, provincial y regional. A nivel global, se debe expandir la investigación entomotoxicológica en escenarios acuáticos o de incendios; así como el impacto del cambio climático sobre la entomofauna y sus repercusiones en el análisis toxicológico de las distintas especies.

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Identification Using Classification Analysis of Flunitrazepam in Necrophagous Larvae via Differential Pulse Voltammetry and Fluorescence Excitation-Emission Matrix (EEM) Spectroscopy

Cited by 6 publications

References 28 publications

Infrared spectroscopy and forensic entomology: Can this union work? A literature review

Infrared spectroscopy and forensic entomology: Can this union work? A literature review

Feasibility study for the analysis of coconut water using fluorescence spectroscopy coupled with PARAFAC and SVM methods

Entomotoxicología Forense En Cadáveres En Estado De Descomposición

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