Brazilian Journal of Analytical Chemistry最新文献

{"title":"From afar and from the inside: about the importance of ethics in the global world of science","authors":"Ewa Bulska","doi":"10.30744/brjac.2179-3425.letter-ebulska.n44","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.letter-ebulska.n44","url":null,"abstract":"“From afar, that is, from my homeland, Poland, perhaps showing to some extent the point of view of a European; from the inside, that is, by being a regular visitor in Brazil and having many personal contacts with Brazilian analysts”. Before I share my thoughts on the ethical responsibility of science, especially analytical chemistry, I would like to emphasize how much I appreciate the high level of anacal chemistry in Brazil. I am also impressed by the number of young people passionate about analytical chemistry. This includes the development of novel analytical procedures and their use to solve several current problems of humanity. Ethical Dimensions in Analytical Chemistry In today's rapidly evolving world, characterized by technological advancements and global interconnectedness, the importance of ethics cannot be overstated. Measurements of chemical quantities, i.e., primarily the content of several substances (chemical compounds, ions, elements, and their isotopes) support many important decisions in science, business, and law-making. Responsibility for the measurement results lies with the analyst, regardless of the country in which the measurements are conducted, no matter how modern the device used is, and no matter how urgent the results are. The problem of responsibility for measurement results is very much discussed in my homeland and in Polish laboratories - both academic and commercial - the attention to the quality of results is very high. Therefore, I think it will be of value if I share with the readers of the Brazilian Journal of Analytical Chemistry some thoughts on ethical considerations in analytical chemistry. In particular, I would like to draw attention to key issues such as data integrity, reproducibility, responsible conduct, and the implications for scientific research and societal trust. Challenges and Solutions in Research Integrity The main effect of analytical chemistry is the generation and interpretation of data, whether from scientific research or routine measurements. The integrity of this data can be compromised by various factors including human error, equipment malfunction, or even deliberate manipulation. Ensuring data integrity requires rigorous adherence to established protocols, focusing on great care for record-keeping, and transparent reporting practices. Moreover, analytical chemists must guard against the temptation to intentionally select data to fit the hypothesis or the temptation to influence results. By upholding principles of honesty and accountability, we not only safeguard the integrity of our research but also uphold the trust placed in our findings by the scientific community and society at large. Let’s look at the challenges related to reproducibility in analytical chemistry research. Factors such as experimental variability, methodological differences, and publication bias can contribute to challenges in replicating research findings. Addressing this requires a concerted effort from researc","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"26 s1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141688042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Brazilian Meeting on Analytical Chemistry: Twenty editions of high-level analytical chemistry","authors":"E. Flores, Márcia Mesko, Renato Zanella","doi":"10.30744/brjac.2179-3425.editorial.enqa2022.n44","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.editorial.enqa2022.n44","url":null,"abstract":"From its inception until this year, the Brazilian Journal of Analytical Chemistry has maintained a high level of scientific information, while also keeping the focus on the integration between industry, academia, and research institutions. The 10th anniversary of BrJAC in 2020 was followed by the celebration of twenty editions of the Brazilian Meeting of Analytical Chemistry (20th ENQA), the largest scientific meeting in the analytical chemistry field in Latin America. This 20th ENQA edition had over 800 participants and was organized together the 8th Ibero-American Congress of Analytical Chemistry (8th CIAQA), coordinated by researchers from the Federal University of Santa Maria (UFSM) following the first edition organized in the state of Rio Grande do Sul in 1999 (10th ENQA). As with previous editions, the 20th ENQA brought some advances in internationalization such as introducing for the first time a complete program, general information, and book of abstracts in the English language. The speakers were encouraged, when possible, to present their works in English. It resulted in an ENQA conference with the largest number of international speakers and provided a more friendly environment for participants outside Brazil. It is important to remember that other divisions of the Brazilian Chemical Society have already changed their respective meetings by using the English language, understanding the importance for internationalization of scientific meetings in South America. For this special edition of BrJAC celebrating the 20th ENQA, we had contributions from many important researchers in different fields of analytical chemistry. In the present issue of the BrJAC, we can read the excellent Interview with a Brazilian researcher with her point of view about analytical chemistry, with special emphasis on the influence of Professor Carol Collins in the area of analytical chemistry in Brazil. This edition also provides a Point of View and two Letters from internationally recognized scientists from North America, South America, and Europe, covering, respectively, the history over the last decades of analytical chemistry in Brazil and cooperation with international research groups (Dr. Ralph E. Sturgeon, Canada) as well as the development of new green sorbents applied for emerging contaminants (Dr. Pablo Richter, Chile) and, finally, covering the different aspects of the importance of ethics in the global world of science (Dr. Ewa Bulska, Poland). Looking at the Articles published in this edition, we have an important contribution in the chemical speciation study for As and Cr in seafood where two methods were described by using LC-ICP-MS and a chemometric approach allowing suitable detection limits. For the field of selective extraction, an interesting work based on dispersive liquid-liquid microextraction of Fe for further determination in beer samples by flame atomic absorption spectrometry is described. In this work, the authors demonstrated the feasi","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"6 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141683959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expanding Collaborations with Brazilian Scientists","authors":"Ralph Sturgeon","doi":"10.30744/brjac.2179-3425.point-of-view-n44","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.point-of-view-n44","url":null,"abstract":"Based on data compiled by the International Monetary Fund and reports from the World Economic Outlook, Brazil currently enjoys the 9th largest economy in the world, edging out Canada by a fraction of a percentage point in Gross Domestic Product.1 Achieving such a metric is a laudable feat and speaks to Brazil’s richness in natural resources, the power of its industries, and the availability of a technologically competitive and educated workforce. Paradoxically, Brazil also possesses one of the most unequal economies in the world due to the persistent high poverty amongst many of its citizens. Changes to this situation will require continued pressure for investment in education, targeting science and technology to support development and protection of intellectual property (IP) emerging from academic and public research organizations. Protected IP, a recognized prime driver influencing today’s economies, allows for innovation and improvements, driving global markets and societal benefits.2,3 Interesting statistics4 based on 2022 Scopus® data (an interactive search engine) place Brazil in position 17 (Canada at 14) internationally with respect to total publications in all areas of chemistry, rising to position 14 (and 18, respectively) when only publications related to analytical chemistry are considered and 16 (and 15, respectively) for the chemistry area pertaining to spectroscopy. Perhaps surprising to some, it is evident that Brazil is currently functioning at a relatively high level amongst its’ technologically peer nations. My first “awareness” of Brazil occurred in 1983, arising from a serendipitous meeting with the late Professor Adilson J. Curtius (PUC-RIO, UFRJ) as we both attended the 23rd Colloquium Spectroscopicum Internationale, convened in Amsterdam. He suggested I should give some future consideration to attending meetings in Brazil and remarked that he was contemplating organizing one focussed on GF-AAS (graphite furnace atomic absorption spectrometry) techniques, as this methodology was being heavily utilized for trace element analyses. True to his word, the “First Rio Symposium on Furnace Atomic Absorption Spectrometry” was convened at the PUC in Rio de Janeiro in September 1988. This was a first step, at that time, in overcoming the general difficulties that scientists from South America had in participating in international conferences, i.e., taking ownership of an international meeting organized within South America which would draw international participants to foster face-to-face discussions. This conference was an overwhelming success and paved the way for a continuing series of such meetings that gradually expanded in scientific content and culminated, most recently, with the 16th Rio Symposium on Atomic Spectrometry organized last year by Prof. Erico Flores in Bento Gonçalves, RS. This 1st Rio meeting had a lasting impact on me as I experienced firsthand the passionate interest Brazilian analytical chemists had in establi","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"25 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Methanol and Ethanol Content in Illegal Alcoholic Beverages using Headspace Gas Chromatography: Case Studies at Rwanda Forensic Institute","authors":"Etienne Ndikumana, Eliphaz Niyonizera, Justin Kabera, Astha Pandey","doi":"10.30744/brjac.2179-3425.ar-106-2023","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.ar-106-2023","url":null,"abstract":"Illegal alcoholic production in Rwanda has become a critical social concern due to its widespread prevalence and associated health risks, stemming from the inexpensive distillation process employed by illicit producers. This often results in the unintentional production of toxic methanol instead of safe ethyl alcohol, presenting a substantial hazard in the context of illegal alcohol production. Methanol, when consumed, transforms into toxic formic acid in the body, causing severe health complications by disrupting mitochondrial respiration. Between 2021 and 2022, 183 forensic cases related to methanol and ethanol poisoning were collected nationwide and examined at the Rwanda Forensic Institute (RFI). Utilizing Headspace Gas Chromatography, the study aimed to quantitatively assess the extent of the problem and compare results to Rwanda’s allowable limits for methanol and ethanol in alcoholic beverages. The analysis demonstrated a significant variation in ethanol content (3.8% to 98.9% v v-1) and methanol levels (32% to 58.3% v v-1), with 6.6% of samples exceeding the methanol limit (0.5% v v-1) and 16.9% surpassing the ethanol limit (45% v v-1). The City of Kigali emerged as the primary contributor to non-compliance, notably associated with specific brands like K’bamba, African Buffalo, Merry Cane, Royal Castle, and unbranded alcoholic beverages. Importantly, none of the samples tested positive for both methanol and ethanol simultaneously, emphasizing the urgency of monitoring and regulating Rwanda’s alcoholic beverages market to ensure compliance with acceptable methanol and ethanol levels and safeguard public health.","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"9 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140673786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Professor Carla Bottoli, an enthusiastic scientific researcher, kindly spoke to BrJAC","authors":"C. Bottoli","doi":"10.30744/brjac.2179-3425.interview.cbgbottoli","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.interview.cbgbottoli","url":null,"abstract":"Carla Beatriz Grespan Bottoli holds a degree in Industrial Chemistry from the Federal University of Santa Maria (1996), as well as a Ph.D. in Chemistry (2002), and a postdoctoral degree in Chemistry (2002-2004), both from the State University of Campinas (Unicamp). In 2005, she undertook an internship at the Institute of Nuclear Sciences of the National Autonomous University of Mexico (UNAM) to study radiolysis in vitamins using gamma radiation from a source of Cobalt 60. In 2017, she presented her habilitation thesis (associate professor's thesis) at Unicamp. Currently, she is Associate Professor and Postgraduate Advisor at the Institute of Chemistry at Unicamp (IQ-Unicamp), where she works in the area of analytical chemistry, with emphasis on separation methods, mainly liquid chromatography. Prof. Bottoli coordinates the NovaCrom – Liquid Chromatography Laboratory (https://novacromlab.wixsite.com/novacrom), which is a research group that has been working on the development of new monolithic stationary phases for capillary liquid chromatography. Research is also focused on the development of analytical methods that employ liquid chromatography coupled with mass spectrometry to study the translocation of pesticides in plants such as coconut, palm, and soybean. Between 2019 and 2021, Prof. Bottoli was an associate coordinator of the Research Commission of the IQ-Unicamp and is currently a member of the Research Integrity Commission at Unicamp. She is a member of the Brazilian Chemical Society and a researcher at the National Institute of Science and Technology in Bioanalytics (INCTBio). Carla Bottoli is the mother of Murilo, 13 and Mateus, 10.","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"382 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140749984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing Green Sorbents Derived from Natural Materials for Microextraction and Determination of Emerging Contaminants","authors":"Pablo Richter","doi":"10.30744/brjac.2179-3425.letter.prichter1","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.letter.prichter1","url":null,"abstract":"Microextraction technologies emerged as an attractive and eco-efficient alternative in sample preparation with the advent of solid-phase microextraction (SPME).1 The sensitivity and precision of methodologies based on microextraction are improving due to the ease of preconcentration and automation capacity that they provide, respectively. Furthermore, the miniaturization and eco-efficiency have improved considerably by using less space and avoiding the use of toxic reagents and high volumes of organic solvents. From the 1990s until the present, SPME has continued to evolve, becoming commercially available for many chromatographic applications. Also in this period, stir bar sorptive extraction (SBSE) has become another commercially available alternative,2 with the extraction device offering a greater volume of sorbent phase compared to SPME. Simultaneously, other novel microextraction techniques have emerged that complement some of the drawbacks of SBSE.3 Among these microextraction techniques, rotating-disk sorptive extraction (RDSE) was proposed by our research group in 2009 and has been recently reviewed, considering all its advances and applications.4,5 The heart of all microextraction technologies is the nature of the sorbent phase. In the context of solid sorbents, they can be classified as synthetic or natural materials according to their origin (Figure 1). Typical examples of synthetic sorbents range from the most hydrophobic octadecyl (C18) to the ion exchange phases, most of them being commercially available. Sorbents of intermediate polarity (hydrophilic–lipophilic balance) and hydrophilic-like silica-based sorbents are also commercially available. In the specific case of emerging contaminants, the copolymer of divinylbenzene and N-vinylpyrrolidone (OasisTM HLB) has largely been used, considering that its hydrophilic–lipophilic balance allows various sorption interactions with emerging contaminants. Among them, hydrophobic interactions occur through -stacking and polar interactions occur via hydrogen bonding. The hydrophilic–lipophilic balance typical of OasisTM HLB has encouraged its use in RDSE as a sorbent in multiresidue analysis.6,7 Although sorbents based on these commercial polymers are being used in different microextraction techniques, some trends are currently being claimed in the design of solid sorbents by considering new synthetic materials. In this context, micro- and nanomaterials have been tested, such as carbon nanotubes, graphene and fullerenes.8 Interactions via delocalized -electrons are especially important for molecules containing aromatic rings, as in the case of emerging contaminants. Other nonconventional materials9 that are being actively studied as synthetic sorbents are porous solids such as metal organic frameworks, covalent organic frameworks and layered double hydroxides. Together with these sorbent developments, the innovation in materials of natural origin, which can be recycled, is another parallel tr","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"230 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140746545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Teaching Experimental Instrumental Analytical Chemistry Are we forming professionals, training operators or illuding students (and ourselves)?","authors":"Fabio Augusto","doi":"10.30744/brjac.2179-3425.point-of-view-faugusto.n43","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.point-of-view-faugusto.n43","url":null,"abstract":"The term “science” refers to “any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation”.1 Therefore, laboratory courses are almost universally considered an integral and mandatory part of instruction on science and technology,2 whatever the field or area of specialization. Consequently, undergraduate chemistry courses (and correlated specialties such as pharmaceutical sciences, biochemistry and some branches of engineering) always include practical disciplines, one of which is instrumental analytical chemistry. Despite being essential for these courses and part of the everyday routine of the faculty affiliated with analytical chemistry departments or programs, several aspects are far from being consensus among lecturers, students and the other people involved. Topics related to course syllabus, general approaches on the implementation and teaching of specific analytical techniques and experiments, their integration with other disciplines, and much more, are a matter of constant discussion and debate. One aspect to be considered is the considerable change in the profile of students that has occurred in recent years. The teaching tools and didactic approaches that university professors and instructors aged > 40 years experienced in their own training are generally not suitable for the present-day undergraduate audience. With former generations, the usual sources of information were printed books and similar materials available in libraries, whereas students today have a greater affinity for consulting online sources,3 which are not always reliable and often return a huge number of search results that require careful evaluation to select which information is relevant and/or reliable. Of course, the facility with which online sources of information are manipulated by our present pupils also has some important advantages: in particular, the near-instantaneous speed of information collection and the virtual accessibility to databases from anywhere on the planet. In addition, until the turn of the millennium, university students were more used to long lectures and experimental classes with relatively complex procedures that often took hours of careful manipulation and numerous laboratory operations (many of them repetitive and tedious). Specifically in the case of practical classes, many of today's students are relatively unaccustomed to experiments that require more than moderate manual skills (at least when compared to their colleagues of previous generations), which may also imply difficulty in organizing their time in the laboratory. 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 ch","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"90 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards Sustainability","authors":"M. A. Zezzi Arruda","doi":"10.30744/brjac.2179-3425.editorial.zezzi.arruda.n43","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.editorial.zezzi.arruda.n43","url":null,"abstract":"The Horizon 2030 program of the United Nations presents a proposal for sustainable development and 17 goals for transforming our world [1]. Various actions and public policies are now striving to attain these objectives, with (bio)analytical chemistry, due to its nature, playing a fundamental role not only in industry but also in education and research [2]. Nowadays, within this concept, the appeal of a methodology continues to be sensitive, precise and accurate in terms of analytical chemistry but the analytical characteristics are also targeted towards the principles of environmental sustainability. Thus, in the literature, it is common to find that methods where the three Hs were used (i.e. High sample/reagent volumes, High risks and Hard work) are now being substituted by methods involving the three Rs (i.e. Reduce, Reuse and Recycle). It is easy to rationalize that the multitude of applications in different research areas (e.g. chemistry, human health, biology, environment, etc.) tend towards minimalist concepts that may involve all analytical sequences. Additionally, to attain the ‘greenness’ metrics of a method, different greenness assessment tools are available in the literature, such as GAPI or AGREE,[2], and metrology and chemometrics may help to attain this objective. 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!","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"97 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Importance of Teaching Metrology for Chemistry Undergraduate Courses - Supplementary Material","authors":"Welington de Magalhães","doi":"10.30744/brjac.2179-3425.rv-98-2023-supp-material","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.rv-98-2023-supp-material","url":null,"abstract":"The supplementary material is an Excel spreadsheets containing the statistical treatment of some examples. The tabs \"Data\", \"Var_x\" and Var_y\" in the Excel file are to be used to perform regressions using the CCC Software as explained by its \"User manual (for Release 1.3)\" available at the INRIM site. The tabs \"Cd Expl A5 QUAM OLS\" and \"Cd Expl A5 QUAM WLS\" are spreadsheets with the OLS and WLS regressions to fit a straight line on the calibration curve data for Cd determination. These spreadsheets can be used to fit straight lines on other calibration curves. The following four tabs with names stating \"CCC\" have the results from CCC Software V. 1.3 for OLS or WLS rectilinear or parabole fit and some calculations in grey cells for the adapted Example A5 QUAM for Cd determination. The final four tabs have data to be pasted on the first three tabs of the file to use the CCC Software to fit the calibration curves of Cd or sulfur determinations.","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"105 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytical Chemistry is like the Fruit of an Apple Tree","authors":"Victor Mihucz","doi":"10.30744/brjac.2179-3425.editorial.vgmihucz.n42","DOIUrl":"https://doi.org/10.30744/brjac.2179-3425.editorial.vgmihucz.n42","url":null,"abstract":"Analytical chemistry is deeply rooted in Europe. It started with the work of Liebig and Fresenius, among others. Then Kirchhoff, as father of spectroscopy, contributed to the development of the modern instrumental analysis techniques flourishing today. As soon as I started learning analytical chemistry at university, I fell in love with it. At that time, I could not explain why I wanted to become an analytical chemist. Having gained experience teaching and performing research in analytical chemistry, I know now that I am attracted to it because this branch of chemistry is what an apple means to an apple tree - the fruit of a myriad of results in fundamental research in chemistry, always offering solutions to real life problems. I always wanted to become an analyst and to work at the analytical chemistry department where I studied. One year ago, my life drastically changed at the institute when I was invited to apply to lead the analytical chemistry department where I have been working since 2007. I must admit that I had mixed feelings in the beginning. First of all, I was honored that my colleagues in the department fully expressed their support. At the same time, I was confused and scared. I felt that I am not the right person to lead a department with a history of almost 120 years, that I had no clear vision of what could I do for my colleagues and for the students choosing our department. However, I wanted to express my gratitude to my colleagues for their trust in me. In my application, I advocated to maintain the high-quality teaching of analytical chemistry at the department and offered to implement challenge-based learning for students choosing our department. In past years, I felt that the raison d'être of analytical chemistry departments as single entities would soon end. My colleagues working in other fields such as biology, geography and geology, pharmacy and medicine, all purchased instrumental analytical equipment and started performing research by themselves. Recently, analytical chemistry departments underwent important organizational and structural changes. Some of them disappeared, others incorporated into their name environmental chemistry, food chemistry, or biochemistry. Recent advances in instrumental analysis create the impression that conducting chemical analysis is an easy task that no longer requires the expertise of chemists devoted to this branch of chemistry. However, there is still a lot of work to do, especially in the field of organic analytical chemistry. Thanks to innovations in mass spectrometry and related techniques, infrared spectroscopy, miniaturization (lab-on-chips) and sensors, ultra trace analysis, green methodologies, and elemental speciation, analytical chemistry is experiencing a second Golden Era. In last year alone, I was surprised by the ever-increasing number of chemistry bachelor and major students knocking on my door asking me to provide them with analytical chemistry-related research topics. Tha","PeriodicalId":505433,"journal":{"name":"Brazilian Journal of Analytical Chemistry","volume":"40 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139451900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}