Volume: 11

Issue: 43


This issue contains an Editorial by Dr. Marco Aurélio Zezzi Arruda, from IQ-Unicamp (BRA) and the BrJAC’s Editor-in-Chief, Interview with Dr. José Luis Capelo Martinez, Associate Professor at the University NOVA of Lisbon (PRT), a Point of View by Dr. Fabio Augusto, from IQ-Unicamp (BRA), and a Letter by Brazaca, L. C.; Bonacin, J. A.; Muñoz, R. A. A.; Janegitz, B. C.; Carrilho, E. (BRA). This edition also contains 01 Review, 03 Articles and 02 Technical Notes. In addition, the reader will find features on scientific meetings, sponsor reports & releases, book notices and a calendar of events.

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Towards Sustainability

Prof. Dr. Marco Aurélio Zezzi Arruda
Full Professor at the Dept. of Analytical Chemistry, Institute of Chemistry at the University of Campinas, SP, Brazil
BrJAC Editor-in-Chief

“Within the context of sustainable development, this volume of the BrJAC is prone to a diversity of applications towards sustainability that involve methods employing small volumes, low-cost sensors, minimalist techniques and the importance of teaching metrology, among others. It is time to enjoy the reading of this issue and take into consideration the important aspects for the next application of our research work, which may involve environmental protection, circular economy and resource sustainability, the so-called sustainability triad (Environment, Economy and Society). Onwards to sustainability!”

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Professor José Luis Capelo Martinez, a researcher who believes that science and technology have a direct and tangible impact on human well-being kindly granted BrJAC an interview

Prof. Dr. José Luis Capelo Martinez
Associate Professor at the University NOVA of Lisbon, Lisbon, Portugal

“…research is not just an academic pursuit but a powerful tool for addressing pressing societal issues. It's a commitment to using my abilities to contribute to the greater good, to extend a helping hand to those in need, and to make a meaningful difference in the lives of individuals and communities.”

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Point of View

Teaching Experimental Instrumental Analytical Chemistry – Are we forming professionals, training operators or illuding students (and ourselves)?

Prof. Dr. Fabio Augusto
Full Professor of the Department of Analytical Chemistry at the Institute of Chemistry, University of Campinas, SP, Brazil

“Perhaps one of the biggest mistakes we make with our current students is that we consider them ill-prepared or less capable than our generation and attribute their difficulties to this simplistic, crude verdict – when perhaps the biggest problem is that, as educators, we are failing to cope with the rapid evolution in the characteristics and profiles of these young people.”

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Electrochemical Biosensors for the Detection of Viruses: Must-Have Products or Just Science for Publication?

Brazaca, L. C.; Bonacin, J. A.; Muñoz, R. A. A.; Janegitz, B. C.; Carrilho, E.

“The SARS-CoV-2 pandemic has brought significant light to the urgent need for rapid, precise, and low-cost diagnosis tools. The scientific community has responded as quickly, overflowing the literature with papers describing interesting biosensors for aiding in the diagnosis of COVID-19. However, almost none of them, mainly the electrochemical ones have reached the market or never will, with only a few traditional formats used in the daily combat of the virus, including ELISA, lateral flow assays, and, mainly, PCR.”

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The Importance of Teaching Metrology for Chemistry Undergraduate Courses
Welington Ferreira de Magalhães, Ricardo de Araújo Kalid, Fernando Cunha, Olivier Pellegrino, Elcio Cruz de Oliveira

The main objective of this work was to stimulate the teaching of the metrology in the chemistry undergraduate courses in Brazil and Portugal. In this work we present some concepts and practical cases of metrology and statistics, which together guarantee the suitability of analytical measurement results for specific purposes. A supplementary material with Excel spreadsheets is available, containing the statistical treatment of some examples and complementing the discussions in this work.
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Design of Experiments (DoE) Application in Two Cases of Study in Pharmaceutical Industries
Romero Moreira Souza, Luiz Americo Verginio Bonamichi, Edenir Rodrigues Pereira-Filho

This study illustrates the practical application of DoE in two real-life scenarios within the pharmaceutical industry. The first case involved optimizing a chromatographic method for the determination of multiple analytes and their degradation products. In the second case, we conducted a shelf-life study for a veterinary product, revealing that the vial filling variable exerted a statistically significant impact. The incorporation of DoE in both cases played an important role in ensuring the attainment of dependable and statistically validated results.

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Development and Performance Evaluation of Low-Cost Cellophane Paper-Based Biosensors for Polyphenol Detection in Teas: A Cost-Effective Alternative to Teflon® Membranes Biosensors
Cássia Aparecida Signori Perone, Thiago Regis Longo Cesar Paixão

This study introduces biosensors developed using cellophane paper with immobilized polyphenol oxidase from dwarf banana and eggplant peels, integrated with glutaraldehyde and a Clark electrode. These biosensors, optimized for enzyme concentration at 75 units for dwarf banana peel and 100 units for eggplant peel, demonstrated high sensitivity to catechol, paracetamol, pyrogallol, and hydroquinone, similar to traditional Teflon® Clark electrodes.

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Development and Validation of an Analytical Method for the Determination of Fipronil and its Degradation Products in 28 Organic and Regular Honey Samples by GC-ECD
Nancy R. da Costa, Gabriel F. da S. Brito, Cyro L. S. Chagas, Fernanda V. Almeida

In this work, a method for the simultaneous analysis of the pesticide Fipronil and its degradation products in honey samples by gas chromatography with electron capture detector (GC-ECD) is presented and validated. The optimized method was applied to 28 commercial honey samples, including organic and conventional, and 11 samples showed a signal of fipronil desulfinyl higher than the limits of quantification, regardless of whether the sample was organic or not.

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Technical Notes

Rapid Prediction of ANFO Based Explosives through ATR-FTIR Analysis – Use of ATR-FTIR in Explosives
Rahul Sharma, Shailendra Kumar

In this study, an Attenuated Total Reflectance - Fourier Transform Infrared Spectroscopy (ATR-FTIR) procedure was developed for easily analyzing the real crime exhibits related to Ammonium Nitrate Fuel Oil (ANFO) based explosives. Firstly, semi-solid material was directly used on the ATR. Further, the sample was extracted using appropriate solvents (diethyl-ether/acetone). Extracts were subsequently analyzed on ATR-FTIR in comparison with standards for ammonium nitrate and diesel. The results significantly showed the presence of ammonium nitrate with the residue of diesel in a real crime exhibit.


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Assessment of Banknotes as a Matrix for Detecting Post-Explosion Residues of Fuel-Oxidizer Explosive Mixtures Using Ion Chromatography
Lúcio Paulo Lima Logrado, Jez Willian Batista Braga, João Carlos Ambrósio Laboissiere

This study employed ion chromatography to analyze uncirculated, circulated, and seized banknotes, aiming to determine their ionic profiles. A simple, fast, and precise extraction method was proposed, yielding RSD values below 10% for most analytes in uncirculated banknotes. The study revealed the presence of various ions of interest, some in significant concentrations, even in uncirculated banknotes. PCA analysis demonstrated a clear separation of uncirculated notes based on their banknote value.

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7th EspeQBrazil and 16th RSAS Discussed Advances in Chemical Speciation and Atomic Spectrometry

The two events featured nearly 30 renowned speakers from more than 14 countries, including Germany, England, France, USA, Poland, Spain, Argentina, Uruguay, and Canada, among others, in the fields of chemical speciation and atomic spectrometry.

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Pittcon 2024: 75 Years of Scientific Breakthroughs

The 75th Pittcon received around 6,000 people and more than 1,000 participants gave technical talks. About 470 vendors filled the exhibit hall, joined by nonprofit organizations, government labs and media groups.

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Sponsor Reports

Quantitation of per- and polyfluoroalkyl substances (PFAS) in aqueous samples by LC-MS/MS following EPA Draft Method 1633
Kevin J. McHale – Thermo Fisher Scientific

This report demonstrates the measurement of 40 per- and polyfluoroalkyl substances (PFAS) in 500 mL water samples at or below the method detection limits (MDLs) reported in U.S. EPA Draft Method 1633 by LC-MS/MS on the Thermo Scientific™ TSQ Quantis™ Plus mass spectrometer.
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Determination of chromium species using ion chromatography coupled to inductively coupled plasma mass spectrometry
Schmelzel, J.; Kutscher, D.; Fisher, C. – Thermo Fisher Scientific

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. A method was outlined that coupled the Dionex Aquion IC system with the iCAP RQ ICP-MS system, which demonstrated linear calibrations over three orders of magnitude, good stability, and suitable accuracy and Limits of Detection.

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New Performance for High Volume Agriculture Laboratories

Milestone’s ETHOS UP equipped with the MAXI 24 High Performance (HP) rotor incorporates all of the benefits of closed vessel microwave digestion while making sample preparation fast, easy, effective, and of the highest quality. This innovative solution perfectly integrates with the powerfull ETHOS UP, matching both performance and throughput requirements of agricultural elemental analysis.

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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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TSQ Altis Plus Triple Quadrupole Mass Spectrometer

With superior acquisition speeds, enhanced sensitivity, prototypical selectivity, and exceptional robustness, the TSQ Altis Plus mass spectrometer delivers unprecedented accuracy and precision for low-level compound detection and quantitation in complex matrices that redefines ultimate instrument performance.

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ETHOS UP High Performance Microwave Digestion System

Quality Analysis Starts with Great Sample Prep. The ETHOS UP™ fully embodies Milestone’s philosophy in microwave sample preparation. Specifically designed for closed vessel microwave acid digestion, it offers productivity, safety, ease of use, connectivity, expertise and application flexibility.

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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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CHROMacademy is the leading provider of eLearning for analytical science

For over 10 years, CHROMacademy has increased knowledge, efficiency and productivity across all applications of chromatography.

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