Jez Willian Batista Braga
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View article: Statistical and Multivariate Evaluation of Olive Oil Degradation During Long-Term Storage
Statistical and Multivariate Evaluation of Olive Oil Degradation During Long-Term Storage Open
Extra virgin olive oil (EVOO) is valued for its flavor and health benefits. However, its quality can decline during storage, reducing food quality and the effectiveness of therapeutic compounds when used as a pharmaceutical excipient. Whil…
View article: Chemical profiling of developmental stages in three major flies via direct infusion mass spectrometry: Improving estimates of minimum postmortem intervals in forensic entomology
Chemical profiling of developmental stages in three major flies via direct infusion mass spectrometry: Improving estimates of minimum postmortem intervals in forensic entomology Open
Forensic entomology has become an essential tool for estimating the minimum postmortem interval (mPMI), especially in scenarios where traditional methods are limited. This study aimed to characterize and differentiate the chemical profiles…
View article: More than methods, we need Analytical Chemistry to solve problems
More than methods, we need Analytical Chemistry to solve problems Open
Most students first learn the classical definition of Analytical Chemistry during undergraduate studies. It is defined as the science of obtaining, processing, analyzing, and communicating information about the composition of a sample. Whi…
View article: Bulk Explosive Investigation: Chemical Analyses of Fuel-Oxidizer Explosive Mixtures Commonly Used in Criminal Actions
Bulk Explosive Investigation: Chemical Analyses of Fuel-Oxidizer Explosive Mixtures Commonly Used in Criminal Actions Open
Explosives are widely utilized across various legal activities, including military operations, law enforcement, mining, and construction. Unfortunately, they are also involved in illegal acts such as terrorism, robbery and vandalism. The a…
View article: Photochemically-made gold nanorods for adsorption and SERS detection of cocaine and benzoylecgonine in latent fingerprints
Photochemically-made gold nanorods for adsorption and SERS detection of cocaine and benzoylecgonine in latent fingerprints Open
Detection of illegal drugs in fingermarks is a routine activity of the scientific police and it can be better carried out with SERS spectroscopy using gold nanorods.
View article: Evaluation of interferents in sampling materials for analysis of post‐explosion residues (explosive emulsion/<scp>ANFO</scp>) using gas chromatography–mass spectrometry (<scp>GC</scp>/<scp>MS</scp>)
Evaluation of interferents in sampling materials for analysis of post‐explosion residues (explosive emulsion/<span>ANFO</span>) using gas chromatography–mass spectrometry (<span>GC</span>/<span>MS</span>) Open
Chemical analysis aimed at identifying post‐explosion residues is critical for investigating crimes or accidents involving explosives, establishing it as a vital area of forensic chemistry. In general, only trace amounts remain in samples …
View article: Assessment of Banknotes as a Matrix for Detecting Post-Explosion Residues of Fuel-Oxidizer Explosive Mixtures Using Ion Chromatography
Assessment of Banknotes as a Matrix for Detecting Post-Explosion Residues of Fuel-Oxidizer Explosive Mixtures Using Ion Chromatography Open
Banknotes are commonly subjected to chemical analysis in forensic laboratories in the search for post-explosion residues. This matrix presents unique challenges due to the potential presence of target analytes resulting from everyday use, …
View article: Diffuse Reflectance FTIR of Latent Fingerprints and Discriminant Analysis for Sex Identification in Humans
Diffuse Reflectance FTIR of Latent Fingerprints and Discriminant Analysis for Sex Identification in Humans Open
Latent fingerprint is an important crime scene evidence, but it is not always recoverable or technically suitable for analysis with fingerprint patterns. Forensic science has shown that other information can be explored from traces using c…
View article: *e-mail: [email protected] Editor handled this article: Ivo M. Raimundo Jr. (Associate) Diffuse Reflectance FTIR of Latent Fingerprints and Discriminant Analysis for Sex Identification in Humans
*e-mail: [email protected] Editor handled this article: Ivo M. Raimundo Jr. (Associate) Diffuse Reflectance FTIR of Latent Fingerprints and Discriminant Analysis for Sex Identification in Humans Open
Latent fingerprint is an important crime scene evidence, but it is not always recoverable or technically suitable for analysis with fingerprint patterns. Forensic science has shown that other information can be explored from traces using c…
View article: Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics
Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics Open
The determinations of cellulose and lignin are important in wood analysis from both perspectives: chemistry composition, commercial and industrial application of woods. In this context, Raman image spectroscopy was applied in the determina…
View article: Brazilian Federal District Cocaine Chemical Profiling - Mass Balance Approach and New Adulterant Routinely Quantified (Aminopyrine)
Brazilian Federal District Cocaine Chemical Profiling - Mass Balance Approach and New Adulterant Routinely Quantified (Aminopyrine) Open
From a set of 159 samples seized by Brazilian Federal Police between 2010 to 2013 in the Federal District, the major component chemical profiling routine analyses revealed the presence of cocaine with purity range of 5.5 to 99.9% (mean 69.…
View article: Identification of Synthetic Drugs on Seized Blotter Papers Using ATR-FTIR and PLS-DA: Routine Application in a Forensic Laboratory
Identification of Synthetic Drugs on Seized Blotter Papers Using ATR-FTIR and PLS-DA: Routine Application in a Forensic Laboratory Open
Blotter papers seizures containing synthetic drugs have intensified over the last decades. These drugs were originally conceived as “legal” alternatives to traditional illicit drugs, designed to mimic their effects and circumvent control a…
View article: Identification of Synthetic Drugs on Seized Blotter Papers Using ATR-FTIR and PLS-DA: Routine Application in a Forensic Laboratory
Identification of Synthetic Drugs on Seized Blotter Papers Using ATR-FTIR and PLS-DA: Routine Application in a Forensic Laboratory Open
Blotter papers seizures containing synthetic drugs have intensified over the last decades.These drugs were originally conceived as "legal" alternatives to traditional illicit drugs, designed to mimic their effects and circumvent control ag…
View article: Overview of current practices in data analysis for wood identification. A guide for the different timber tracking methods.
Overview of current practices in data analysis for wood identification. A guide for the different timber tracking methods. Open
Today we have five types of timber tracking tools available. Each has its ownstrengths and limitations (see the Timber Tracking Tool Infogram), but togetherthey offer a broad range of methods that can assist us in identifying the botanical…
View article: Implications of measurement error structure on the visualization of multivariate chemical data: hazards and alternatives
Implications of measurement error structure on the visualization of multivariate chemical data: hazards and alternatives Open
The analysis of multivariate chemical data is commonplace in fields ranging from metabolomics to forensic classification. Many of these studies rely on exploratory visualization methods that represent the multidimensional data in spaces of…
View article: CLASSIFICATION OF MINERAL WATERS BASED ON DIGITAL IMAGES ACQUIRED BY SMARTPHONES
CLASSIFICATION OF MINERAL WATERS BASED ON DIGITAL IMAGES ACQUIRED BY SMARTPHONES Open
This work describes a new procedure for classification of mineral waters based on digital images acquired by smartphones. Commercial waters from eight mineral springs plus distilled water and tap water were combined with eriochrome T black…
View article: Detection of Counterfeit Durateston® Using Fourier Transform Infrared Spectroscopy and Partial Least Squares - Discriminant Analysis
Detection of Counterfeit Durateston® Using Fourier Transform Infrared Spectroscopy and Partial Least Squares - Discriminant Analysis Open
Medicines containing anabolic steroids are one of the main targets for counterfeiting worldwide, including Brazil. The aim of this work was to propose a method for discriminating original and counterfeit Durateston® ampoules by Fourier tra…
View article: DISCRIMINATION BETWEEN SIMILAR WOODS BY MOLECULAR FLUORESCENCE AND PARTIAL LEAST SQUARES
DISCRIMINATION BETWEEN SIMILAR WOODS BY MOLECULAR FLUORESCENCE AND PARTIAL LEAST SQUARES Open
Wood is an extremely complex biological material, which can show macroscopic similarities that make it difficult to discriminate between species. Discrimination between similar wood species can be achieved by either anatomic or instrumenta…
View article: Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics
Exploratory Analysis of the Distribution of Lignin and Cellulose in Woods by Raman Imaging and Chemometrics Open
The determinations of cellulose and lignin are important in wood analysis from both perspectives: chemistry composition, commercial and industrial application of woods. In this context, Raman image spectroscopy was applied in the determina…
View article: Brazilian Federal District Cocaine Chemical Profiling - Mass Balance Approach and New Adulterant Routinely Quantified (Aminopyrine)
Brazilian Federal District Cocaine Chemical Profiling - Mass Balance Approach and New Adulterant Routinely Quantified (Aminopyrine) Open
From a set of 159 samples seized by Brazilian Federal police between 2010 to 2013 in the Federal District, the major component chemical profiling routine analyses revealed the presence of cocaine with purity range of 5.5 to 99.9% (mean 69.…