Volume: 9

Issue: 37


This issue brings an Editorial by Prof. Dr. Elias A. G. Zagatto (CENA-USP); Interview with Prof. Dr. Susanne Rath (IQ-Unicamp); Point of View by Prof. Dr. Wendell K. T. Coltro (IQ-UFG); Letter by Prof. Dr. Fabiola M.V. Pereira (IQ-UNESP); In Memoriam Prof. Dr. Carol Collins; Review on the analysis of pesticide multiresidues in sweet pepper samples; 8 Articles on Chemometric evaluation of a biodegradable system for the removal of Pb(II) and Hg(II) ions from water; Carbon and oxygen isotope profile in Brazilian blueberries; Use of hydrodistillation to obtain and fractionate essential oils simultaneously; Voltammetric assessment of 8-oxoguanine at a nano-structured carbon materials based modified glassy carbon electrode; Extraction and evaluation of flamboyant mirim gum as a potential viscosifying agent for enhanced oil recovery fluids; Tracing the geographical origin of moroccan saffron by mid-infrared spectroscopy and multivariate analysis; Comparison of ultrasound-assisted methods for copper determination in bovine and ovine liver as strategies for food surveillance and animal status monitoring; and Eco-friendly UV spectrophotometric method for simultaneous estimation of evogliptin and metformin hydrochloride in bulk and combined tablet dosage form; and a Feature on the 16th Edition of Analitica Latin America Expo.

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Go International

Prof. Dr. Elias A. G. Zagatto
Center of Nuclear Energy in Agriculture (CENA), University of São Paulo, SP, Brazil

“The teaching-research-extension triad … tends to be more expressive when involves collaborations within different groups, and the presence of foreign scientists is welcome in the context. This is consistent with the expression “GO INTERNATIONAL”, endorsed by BrJAC.”

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Prof. Susanne Rath, a researcher who has bravely faced challenges since childhood, kindly granted BrJAC an interview

Prof. Dr. Susanne Rath
Institute of Chemistry, University of Campinas, SP, Brazil

“Due to the cuts in funds allocated to research, we are experiencing a delicate and challenging moment in Brazil. This scenario requires great effort from researchers to maintain their research activities.”

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Point of View

Paper-based microfluidics: What can we expect?

Prof. Dr. Wendell K. T. Coltro
Institute of Chemistry, Federal University of Goiás, GO, Brazil

“Commercially available products with sample-in-answer-out capabilities are highly desirable to be found more and more in the market. Due to the global affordability of paper as well as its attractive features to create microfluidic and sensor prototypes, it is possible to see a real niche full of possibilities for success.”

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Chemometrics reveals not-so-obvious analytical information

Prof. Dr. Fabiola Manhas Verbi Pereira
Institute of Chemistry, São Paulo State University, SP, Brazil

“Chemometrics extract information that is not easy to visualize at first through univariate evaluations or using simple plots. Nowadays, thousands of instrumental data can furnish important chemical information, and we must use them for significant proposals.”

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In Memoriam

BrJAC mourns the death of Prof. Dr. Carol Collins and recognizes her great contribution to the Analytical Chemistry in Brazil

By Prof. Dr. Carla Beatriz Grespan Bottoli
Institute of Chemistry, University of Campinas, Campinas, SP, Brazil

“The contributions of Prof. Collins to the training of human resources, the consolidation and development of the Institute of Chemistry at Unicamp and the analytical chemistry/chromatography sector in Brazil and abroad are immeasurable.”

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An integrative review on the analysis of pesticide multiresidues in sweet pepper samples using the QuEChERS method and chromatographic techniques
Fabiane Ferraz Wisniewski, Elisandra Carolina Martins

This work was developed through an integrative review in the journal databases Capes, Science Direct, Scielo, and Scientia Chromatographic, from 2011 to 2021, to answer the following question: “What is the most efficient and advantageous sample preparation method for the determination of multiresidue pesticides of interest in sweet pepper samples, when chromatographic techniques are used for detection?”.
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Chemometric Evaluation of a Biodegradable Tannic Acid-Polyurethane System for the Removal of Pb(II) and Hg(II) Ions from Water
Paula Rogéria da Silva Ferreira, Anderson José dos Santos, Adriana de Paula Cardoso, Paulo Henrique Souza Almeida, Jânio Alves Ribeiro, Salvador Claro Neto, Ailton José Terezo, Adriano Buzutti de Siqueira

The objective of this study was to determine optimal parameters for immobilization of Tannic acid (TA) in biodegradable polyurethane (PU); also, to perform a comparative study of the analytical methods used to evaluate which one is efficient to quantify TA in PU. The chemometric tools used made it possible to study the possibility of removing Hg (II) and Pb (II) ions from industrial effluents.

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Carbon and Oxygen Isotope Profile in Brazilian Blueberries (Vaccinium spp.)
Letícia Leonardelli, Susiane Leonardelli, Joséli Schwambach

This study aimed to build the first database for stable isotopes of blueberries, including eleven cultivars and characterizing the range of carbon (13C/12C) and oxygen (18O/16O) values in different blueberry cultivars. In addition, to assess the effectiveness of the stable isotopes of carbon and oxygen to determine the geographical origin of blueberries.

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Use of Hydrodistillation to Obtain and Fractionate Essential Oils Simultaneously
Clécio Souza Ramos, Daysnan Nicolly Arcanjo dos Santos, Líbna Larissa Monteiro Claudino, João Paulo Araújo de Albuquerque, Marcílio Fagner Fontes Silva

A simple method was developed to obtain and fractionate essential oil simultaneously by hydrodistillation. The method was efficient for the separation and concentration of chemical constituents of essential oils from the same plant, able to distinguish the different chemical profiles, both qualitatively and quantitatively.

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Voltammetric Assessment of 8-Oxoguanine at a Nano-Structured Carbon Materials Based Modified Glassy Carbon Electrode
Rajesh N. Hegde, Vishwanatha P., Sharanappa T. Nandibewoor

The voltammetric behavior of 8-Oxoguaine on a multi walled carbon nanotubes / carbon black modified glassy carbon electrode was investigated. Using cyclic voltammetry, a method for the determination of 8-Oxoguaine was developed.
The voltammetric sensor can be employed for voltammetric assessment of 8-Oxoguaine with good reproducibility and recovery. This work adds a new modified electrode to voltammetric field.

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Extraction and Evaluation of Flamboyant Mirim Gum as a Potential Viscosifying Agent for Enhanced Oil Recovery Fluids
Ana Karolina Menezes Costa, Juliana Perdiz Senna, Larissa Vicente da Silva Cardoso, Luiz Carlos Magalhães Palermo, Claudia Regina Elias Mansur

The main objective of this work was to propose a factorial experimental design to optimize the galactomannan extraction process from its seeds and evaluate its potential as a viscosifying agent for enhanced oil recovery. The galactomannan was characterized by FTIR, NMR, SEC, thermogravimetric analysis, elemental analysis, and rheology.

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Tracing the Geographical Origin of Moroccan Saffron by Mid-Infrared Spectroscopy and Multivariate Analysis
Omar Elhamdaoui, Aimen El Orche, Amine Cheikh, Khalid Laarej, Khalid karrouchi, Miloud El karbane, Mustapha Bouatia

This work aims to investigate the potential of mid-infrared spectroscopy (MIR) and chemometrics algorithms for the determination of geographical origin and detection of adulteration of Moroccan saffron samples. Compared to other techniques, the main advantages of the proposed methods are non-destructive, fast and sensitive, which allows to achieve very precise and accurate results.

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Comparison of Ultrasound-assisted Methods for Copper Determination in Bovine and Ovine Liver as Strategies for Food Surveillance and Animal Status Monitoring
Fiorella Iaquinta, Jessica Santander, Mariela Pistón, Ignacio Machado

Four methods for the efficient extraction of copper from bovine and ovine liver were optimized. The proposed methods are simple alternatives for food surveillance and animal status monitoring, being straightforward and aligned with Green Chemistry principles, as it was demonstrated by performing the analytical Eco-Scale comprehensive approach.

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Eco-Friendly UV Spectrophotometric Method for Simultaneous Estimation of Evogliptin and Metformin Hydrochloride in Bulk and Combined Tablet Dosage Form
Neetu Agrawal, Shilpi Pathak

In the present study, an UV spectrophotometric method was developed in distilled water, an environment-friendly solvent using the simultaneous equation technique to simultaneously determine Evogliptin (EGT) and metformin hydrochloride (MFH) in bulk and tablet dosage form. The developed method was validated and applied to commercial tablet dosage forms containing EGT and MFH in combination.

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The 16th Edition of Analitica Latin America Expo Received Around Seven Thousand Attendees

Held from June 21 to 23, 2022, in Sao Paulo, SP, Brazil, this event brought together 15 exhibitors with 50 potential buyers in a reserved space favorable to the consolidation of partnerships. Over two hours, about 190 meetings were held in order to facilitate the negotiation between the two parties. The meeting moved around US$ 200,000. In addition to Brazilian visitors, the Expo received visitors from around 20 countries.

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Sponsor Reports

Determination of chromium species using ion chromatography coupled to inductively coupled plasma mass spectrometry
John Schmelzel, Daniel Kutscher, Carl Fisher

The goal of this report is to highlight a simple method to separate and quantify both major Cr species, Cr (III) and Cr (VI) in drinking water.

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Unstoppable analysis of pesticides residues in black tea using triple quadrupole GC-MS
Camille Grigsby, Carlos Parra, Jerry Mueller, Katie Banaszewski, Giulia Riccardino and Adam Ladak

The aim of this report is to demonstrate the performance of the Thermo Scientific TSQ 9610 triple quadrupole mass spectrometer coupled to the Thermo Scientific TRACE 1610 GC for trace level determination of pesticide residues in black tea.

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Microwave assisted extraction of pesticides from environmental samples

Milestone’s ETHOS X equipped with fastEX-24 eT rotor was used in this study to prove its efficacy in the extraction of pesticides from environmental matrices.

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Sponsor Releases

IC-ICP-MS Analyzer for Speciation Analysis

While total elemental content can be analyzed by ICP-MS, speciation analysis of trace elements is ideally performed by a Thermo Scientific IC-ICP-MS system. The speciation analyzer includes a metal-free IC system with high resolution ion exchange columns and simple online connectivity, together with high sensitivity ICP-MS and integrated software.

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Thermo Scientific TSQ 9610 Triple Quadrupole GC-MS/MS System – Unstoppable confidence for analytical testing

User-centric NeverVent™ technology, extended-life detector, and intelligent software eliminate unnecessary downtime to maximize your sample throughput and return on investment.

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ETHOS X – Advanced Microwave Extraction System for Environmental Laboratories

The ETHOS X with the fastEX-24 rotor allows for simultaneous extraction of 24 samples in 40 min with minimal solvent usage. By using large volume disposable glass vials, the fastEX-24 rotor simplifies handling and allows to achieve lower detection limits.

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Pittcon Conference & Expo

Pittcon is a friendly, welcoming environment where analytical chemists at all professional levels meet. Pittcon is a platform for sharing ideas and cooperating to form new ones. At Pittcon, you will find that spark that drives your research, your career, and above all, your scientific perspective forward.

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SelectScience® Pioneers online Communication and Promotes Scientific Success

SelectScience® informs through trusted lab product reviews, virtual events, thought-leading webinars, features on hot scientific topics, eBooks and more, independent online publisher SelectScience® provides scientists across the world with vital information about the best products and techniques to use in their work.

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