Article
Chemistry, Analytical
Ma Lucia Abad-Gil, Ma Jesus Gismera, Teresa Sevilla, Jesus R. Procopio
Summary: In this study, the electrochemical behavior of MIT on a gold electrode was investigated and square wave voltammetric methods were developed for its determination at different concentration levels. MIT showed an irreversible and diffusion-controlled oxidation process, with pH-dependent potential and peak current values. By using square-wave voltammetry (SWV) and adsorptive stripping approach (SWAdSV), it is possible to determine MIT in water samples with high sensitivity and low detection limits. Both SWV and SWAdSV methods were successfully applied for the analysis of MIT in different water samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Fernanda C. O. L. Martins, Djenaine De Souza
Summary: This work presents the development of an electroanalytical method for detecting nanomolar levels of selenium, utilizing a silver solid amalgam electrode modified with a stable mercury film and square-wave cathodic adsorptive stripping voltammetry. The optimized parameters resulted in satisfactory results, providing potential for selenium detection in food and beverage samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Florina Pogacean, Codruta Varodi, Lidia Magerusan, Stela Pruneanu
Summary: This article presents the development of an electrochemical sensor based on graphene/glassy carbon electrode for trace level detection of nitrite in water samples. The sensor exhibits remarkable enhanced sensing response towards nitrite compared to the bare electrode (three orders of magnitude higher). It also demonstrates excellent operational stability, repeatability, and interference capability, and shows excellent results in the practical application test in commercially available waters.
Article
Electrochemistry
Rubin Gulaboski, Kiro Papakoca, Valentin Mirceski
Summary: Differential square-wave voltammetry (DSWV) is an electrochemical technique derived from square-wave voltammetry (SWV) that enhances the analytical and kinetic performances. It improves the voltammetric features of both the forward and backward current components, especially for electrode reactions with slow kinetics. This study explores DSWV as a working technique for investigating a surface electrode mechanism coupled with a reversible preceding chemical reaction, providing theoretical results and identifying specific voltammetric features for recognizing this mechanism under DSWV conditions.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Madalina Tudose, Rodica D. Baratoiu-Carpen, Elena Maria Anghel, Mariana Voicescu, Simona Somacescu, Daniela C. Culita, Anamaria Hanganu, Andrei Kuncser, Antonio Radoi
Summary: A new composite material was successfully synthesized by covalently grafting pyrene thiazole onto the surface of graphene oxide. Various characterization methods confirmed the successful functionalization of graphene oxide with pyrene thiazole, showing potential for detecting caffeic acid.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Electrochemistry
Syed Rafiquddin, Aliaksei Boika
Summary: The study focused on the detection of As(III) at low concentrations using a hot microelectrode technique, showing a linear relationship with a low detection limit that can be further improved by extending the deposition time.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Biotechnology & Applied Microbiology
Fabricio Cristiano Vaz, Tiago Almeida Silva, Orlando Fatibello-Filho, Monica H. M. T. Assumpcao, Fernando Campanha Vicentini
Summary: Bentazon is a widely used post-emergence herbicide, and a simple and efficient analytical method based on a modified glassy carbon electrode has been developed for its voltammetric determination, showing high sensitivity and selectivity towards the compound.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Materials Science, Multidisciplinary
Khursheed Ahmad, Haekyoung Kim
Summary: In this paper, WO3 rods prepared by sol-gel method were used to modify the electrode for electrochemical sensing of dopamine. The WO3-modified electrode showed good detection limit and sensitivity, as well as selectivity, stability, and repeatability for dopamine determination.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Analytical
R. Ramya, P. Thivya, D. Nathiya, J. Wilsonn
Summary: In this study, a nanostructured composite material modified electrode was used for the efficient detection of theophylline, demonstrating good stability and sensitivity. The proposed electrochemical sensor exhibited good selectivity and reproducibility for accurate and rapid detection of theophylline.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2021)
Article
Chemistry, Physical
Francis Merlin Melataguia Tchieno, Evgenia Dmitrieva, Susanne Boye, Sandra Schiemenz, Robert Kluge
Summary: A high cationic density polymer (poly(diallyldimethylammonium chloride)) intercalated montmorillonite (PDDA@Mt) was prepared at room temperature for the electrochemical determination of mangiferin.
APPLIED CLAY SCIENCE
(2023)
Article
Electrochemistry
Nathan D. Smith, Stephen Lombardo, Shun-Li Shang, Zi-Kui Liu, Hojong Kim
Summary: The kinetic properties of Ni(II) in FLiNaK molten salt were investigated using various electrochemical techniques. The reduction of Ni(II) to Ni(s) was found to be a single step, two-electron transfer process. Diffusivity values were calculated using different equations and methodologies, with a range of 3.27 x 10(-7)-3.04 x 10(-6) cm(2) s(-1) and an activation energy of 62-104 kJ mol(-1). The variations in the estimated kinetic properties may be attributed to the assumptions made in the theoretical models regarding reversibility and unit activity during Ni metal deposition.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Environmental Sciences
Nicolas Layglon, Sebastien Creffield, Eric Bakker, Mary-Lou Tercier-Waeber
Summary: In this study, optimization, characterization, and validation of Adsorptive Square Wave Cathodic Stripping Voltammetry on antifouling gel-integrated microelectrode arrays were reported for autonomous, direct monitoring of cobalt(II) metal species. Detection was achieved by complexation with an added nioxime ligand. The microelectrode array was integrated into a submersible probe to automatically dose the complexing agent and realize an integrated sensing system. For the first time, the potentially bioavailable Co(II) fraction was determined in a river-bay continuum, enabling evaluation of the potential ecotoxicological impact of freshwater-carried Co(II) in the bay. The measured Co(II) concentrations were hazardous for aquatic biota along the continuum. Electrochemical Co(II) data were compared to ICP-MS data in various fractions to determine spatial Co(II) speciation.
MARINE POLLUTION BULLETIN
(2023)
Article
Chemistry, Analytical
Lanting Qian, Abigail van Riesen, Joshua van der Zalm, Richard Manderville, Aicheng Chen
Summary: Investigations on the electrochemical behaviors of merocyanine dyes revealed their strong dependence on the type of electrode used, as well as the presence of substituent functional groups. The inclusion of these functional groups led to reduced fouling and affected electron transfer kinetics. Understanding the influence of substituents allows for the design and synthesis of aptamer-binding merocyanine dyes for highly robust and sensitive electrochemical sensors in medical and environmental applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Biophysics
Nadine Wenninger, Sudkate Chaiyo, Alexander Kollau, Kurt Kalcher, Astrid Ortner
Summary: In this study, an immunosensor was developed for the direct and sensitive detection of symmetric dimethylarginine (SDMA) in urine, which is emerging as a biomarker for renal disease. The immunosensor utilizes anti-SDMA antibodies for specific detection and quantification. The proposed method showed excellent selectivity and a linear correlation between the peak decline and SDMA concentration in the range of 50 nM -1 μM, with a detection limit of 15 nM. This immunosensor can be valuable in the diagnosis and monitoring of renal disease by monitoring SDMA levels in urine.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Ante Milicevic
Summary: The study introduces models based on differences in net atomic charges to explore the mechanisms of electron loss during the electrochemical oxidation of flavonoids. The best model for a given set of flavonoids combines all three variables, suggesting that multiple mechanisms are at play.
MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Aluisio Marques da Fonseca, Sadrack Queque Cabongo, Bernardino Joaquim Caluaco, Regilany Paulo Colares, Carla Freire Celedonio Fernandes, Helcio Silva dos Santos, Pedro de Lima-Neto, Emmanuel Silva Marinho
Summary: The global pandemic caused by Sars-CoV-2 has posed a significant health problem, and previous studies have identified the main protease (Mpro) as a potential target for this virus. In this study, researchers used a de novo molecular design method with the help of artificial intelligence to construct new bioactive compounds for inhibition. The simulation results showed that Hit 998 had the highest bioaffinity value and synthetic viability of 50%.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Chemistry, Physical
Daniela Mirela Lima Pinheiro, Lucas Lima Bezerra, Ana Aline Coelho Alcanfor, Filipe Xavier Feitosa, Norberto Kassio Vieira Monteiro, Adriana N. Correia, Pedro de Lima Neto, Hosiberto Batista de Sant'Ana
Summary: The thermodynamic and electrochemical properties of Ag+ ions in ChCl and G mixture were investigated, and MD and DFT methods were used for computational simulation. The specific mass, speed of sound, viscosity, and refractive index of the solution were measured at different temperatures. The electrochemical behavior of Ag+ ions was analyzed by cyclic voltammetry, and silver coatings were successfully electrodeposited on the Au surface. SEM analysis revealed the surface morphologies of the electrodeposits. The computational calculation showed that adding silver nitrate to the eutectic solvent had a predominant repulsive effect and negligible influence on sound velocity and refractive index. MD simulations demonstrated a strong interaction between Ag+ ions and Cl ions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Analytical
Andre O. Santos, Vanessa E. E. Abrantes-Coutinho, Simone Morais, Thiago M. B. F. Oliveira
Summary: The lectin found in Agaricus bisporus mushroom biomass can be used to develop a photoelectrochemical biosensor with high sensitivity and specificity for lactose detection. Immobilizing the lectin on a poly(methylene blue)/fluorine-doped tin oxide-coated glass platform enhances the performance of the biosensor. This research has significant implications for ABL-based biosensors and the use of Agaricus bisporus extract in biotechnological applications.
Article
Biochemistry & Molecular Biology
Raissa Lohanna Gomes Quintino Correa, Matheus Morato Ferreira de Moraes, Kleber Thiago de Oliveira, Yuri Alexandre Aoto, Mauricio Domingues Coutinho-Neto, Paula Homem-de-Mello
Summary: This research validates the accuracy and applicability of different density functional theory (DFT) methods in describing the UV spectra of curcumin and its metal complexes. The results show that DFT methods accurately describe the absorption spectra of curcumin due to its intra-ligand excitations. However, for MLCT transitions in metal complexes, no DFT method achieved acceptable accuracy.
JOURNAL OF MOLECULAR MODELING
(2023)
Article
Biochemistry & Molecular Biology
Leonardo P. da Silva, Francisco Wagner Q. Almeida-Neto, Lucas L. Bezerra, Jacilene Silva, Norberto K. V. Monteiro, Marcia M. Marinho, Helcio S. dos Santos, Alexandre M. R. Teixeira, Emmanuel S. Marinho, Pedro de Lima-Neto
Summary: Chagas disease is a tropical disease caused by the parasite Trypanosoma cruzi, transmitted by the barber insect. This study evaluates the antichagasic potential of five sulfonamide molecules derived from anacardic acid using molecular approach. The results show that SA1, SA2, and SA4 exhibit better interactions with the target enzyme, indicating their potential as antichagasic agents.
JOURNAL OF MOLECULAR MODELING
(2023)
Article
Chemistry, Inorganic & Nuclear
Jose Barbosa Silva, Juan Pablo Echeverry, Regina Claudia Rodrigues dos Santos, Valdir Ferreira de Paula Jr, Maria Izabel Florindo Guedes, Bruno Poti e Silva, Antoninho Valentini, Ewerton Wagner Santos Caetano, Valder Nogueira Freire
Summary: This study presents the growth of monoclinic gamma-aminobutyric acid (GABA) crystals from an aqueous ethanol solution. The crystal structure was confirmed to be monoclinic with space group P21/c using X-ray diffraction analysis. Thermal stability and melting point of the GABA crystal were investigated. Experimental characterization and DFT calculations were performed to understand the optical properties of GABA crystals. The monoclinic GABA crystal was found to have an indirect band gap semiconductor behavior with a gap value of 5.02 eV and the highest optical absorption in the 5-6 eV energy range.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Ronnie A. R. Semedo, Ana Aline C. Alcanfor, Natalia G. Sousa, Paulo N. S. Casciano, Adriana N. Correia, Juliermes C. Pereira, Pedro de Lima-Neto
Summary: Znx-Mn1-x coatings were successfully electrodeposited on a rotating 1020 carbon steel electrode using a choline chloride and urea mixture without additives. The corrosion performance of the coatings was evaluated and showed better corrosion protection than the pure Zn coating. The Zn84Mn16 coating had the best performance, lasting 3 times longer than the pure Zn coating in immersion tests.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Caique Diego de Abreu Lima, Roniel dos Santos Sousa, Antonio Werbeson Miranda, Joao Victor Barbosa Moura, Gardenia de Sousa Pinheiro, Bartolomeu Cruz Viana, Iara Souza Lima, Thiago Mielle Brito Ferreira Oliveira, Oswaldo Baffa, Jefferson Ferraz Damasceno Felix Araujo, Cleanio da Luz Lima
Summary: This study investigated the synthesis, characterization, and thermal stability of pure and Al ion-exchange titanate nanotubes (Na2Ti3O7 and NaxAlyTi3O7, respectively). The results revealed the obtainment of sodium titanate and aluminum titanate nanotubes with different average lengths and diameters. The presence of Al ions in the crystal lattice affected the energy exchange between the unpaired species and the lattice. The thermal stability of sodium titanate nanotubes was influenced by sodium ions, while the incorporation of Al3+ ions into the nanotube lamellae decreased the thermal stability of aluminum titanate nanotubes.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
Laudenor Amorim, Renato Verissimo de Oliveira, Lucas Lima Bezerra, Lucas Pinheiro Coutinho, Pierre Basilio Almeida Fechine, Adriana Nunes Correia, Amison Rick Lopes da Silva, Pedro de Lima-Neto, Norberto Kassio de Vieira Monteiro
Summary: This study analyzed the behavior of Fe2+ and Mn2+ ions in water and a deep eutectic solvent (DES) based on choline chloride and ethylene glycol. The results showed stronger interaction between the metal ions and water compared to their interaction in the DES. The study provides insights into the coordination possibilities and behavior of these systems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Metallurgy & Metallurgical Engineering
Francisco Evaristo Uchoa Reis, Luis Paulo Mourao dos Santos, Lorena Braga Moura, Mirela Oliveira de Castro, Pedro de Lima Neto, Jorge Luiz Cardoso, Hamilton Ferreira Gomes de Abreu
Summary: The mechanical properties and corrosion resistance of annealed superferritic stainless steel model alloy 25Cr-6Mo-5Ni were studied in 0.6 M NaCl solution. The microstructure exhibited a ferrite matrix and eutectoid phase with a lamellar structure distributed at grain boundaries and within the ferrite grains with a spherical morphology. The model alloy displayed brittle behavior according to tensile and impact results. Fractography analysis revealed the presence of cleavage facets, river patterns, and micro-cracks at grain boundaries and across the ferrite grains. Pitting corrosion initiated within the eutectoid phase containing chrome depletion zones. Electrochemical impedance spectroscopy measurements indicated that the breakdown of passive films was more susceptible in the eutectoid phase.
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Analytical
Deomar N. Rodrigues-Junior, Natalia G. Sousa, F. Murilo T. Luna, Thiago M. B. F. Oliveira, Dieric S. Abreu, Walther Schwarzacher, Pedro de Lima-Neto, Adriana N. Correia
Summary: Hydrogen has emerged as a promising production route for clean and renewable energy. This work reports new findings on Zn, Co, and Zn-Co coatings produced in a deep eutectic solvent. Varying the concentrations of Zn2+ and Co2+ ions allows for precise control of composition and morphology of the electrodeposits, which exhibit different reactivity for the hydrogen evolution reaction (HER) in alkaline medium. Increasing the Co content in the coatings positively influences hydrogen production.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Natalia G. Sousa, Renato V. de Oliveira, Ana Aline C. Alcanfor, Filipe X. Feitosa, Hosiberto B. de Sant'Ana, Walther Schwarzacher, Pedro de Lima-Neto, Norberto K. V. Monteiro, Adriana N. Correia
Summary: The objective of this study was to electrodeposit Sn-In coatings using a deep eutectic solvent and to characterize the electrolytes employed. Experimental results showed that Sn2+ and In3+ ions interacted more strongly with Cl- ions than with ethylene glycol and choline.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Ana G. N. Camara, Francisco W. Q. Almeida-Neto, Yana L. C. Silva, Fatima M. Nunes, Marcos C. Mattos, Jair Mafezoli, Francisco G. Barbosa, Emmanuel S. Marinho, Pedro Lima-Neto, Maria C. F. Oliveira
Summary: This study characterized the spectroscopic properties of norbadione A (2), a naphtalenoid pulvinic acid derivative isolated from Pisolithus tinctorius, and confirmed its proposed chemical structure through comparison of experimental and theoretical data. The electronic properties of pulvinic acid (1) and its derivatives were also investigated using quantum chemical calculations.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
James Moraes de Almeida, Conny Cerai Ferreira, Lucas Bandeira, Renato D. Cunha, Mauricio Domingues Coutinho-Neto, Paula Homem-De-Mello, Ednilsom Orestes, Regina Sandra Veiga Nascimento
Summary: This study found that the combination of hyperbranched polyglycerol (HPG) and cetyltrimethylammonium bromide (CTAB) can significantly reduce the interfacial tension of oil/water interfaces. The mechanism of tension reduction involves the weakening of specific interactions between CTAB and HPG, enlargement of interfacial area due to aggregates, and spreading of individual molecules' charge profiles.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Karen P. S. Lopes, Maria C. C. Lucena, Thiago Inacio B. Lopes, Amison R. L. da Silva, Leonardo P. da Silva, Norberto K. V. Monteiro, Pedro de Lima-Neto, Nagila M. P. S. Ricardo
Summary: This study aims to use infrared (IR) in silico data as a standard database for preliminary analysis of new synthetic seized drugs. Computational chemistry was used to compare ten of the most common synthetic illicit substances on the Brazilian market and evaluate infrared data from a standard electronic library, experimental data from seized samples, and data simulated by Density Functional Theory (DFT). The results suggest that using computational methodology is a feasible way to analyze the structures of new synthetic drugs and obtain preliminary infrared profiles.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Michel Rocha Baqueta, Augusto Cesar Costa-Santos, Ana Paula Rebellato, Gisele Marcondes Luz, Juliana Azevedo Lima Pallone, Federico Marini, Alexsandro Lara Teixeira, Douglas N. Rutledge, Patricia Valderrama
Summary: This study reports the essential element composition of new Brazilian Canephora coffees and applies chemometric tools for analysis. The results demonstrate the suitability of this method for origin and species discrimination based on the inorganic fraction of coffee.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mengjie Li, Jiapeng Wang, You Zhou, Yang Chen, Lingying Xia
Summary: A novel photoelectrochemical biosensor based on gold nanoparticles and specific structures was developed for highly sensitive detection of mercury ion. The multiple sandwich structures hindered electron supply and light harvesting, resulting in a weakened PEC signal, while the specific structures extinguished the PEC signal, enabling quantitative detection of Hg2+. The sensor exhibited high selectivity and stability, with potential applications in environmental detection, biological analysis, and medical research.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mohamed A. Korany, Rasha M. Youssef, Marwa A. A. Ragab, Mostafa A. Afify
Summary: A stability-indicating fit-for-purpose method was developed for the determination of HC, TL, and PS in syrup dosage form. The method successfully separated CL from THY and quantified the analytes using HPLC-DAD. The robustness of the method was assessed through statistical analysis and self-validation.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Lingling Lin, Minyu Li, Ping Li, Chenqing Ye, Huanglong Zhuang, Shaohuang Weng, Feng Chen
Summary: This study developed a highly sensitive and selective electrochemical sensor for simultaneous detection of dopamine and uric acid. The sensor exhibited excellent anti-interference and stability, and could accurately measure dopamine and uric acid in human urine samples.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Peifang Chen, Caiyun Jiang, Zhouping Wang, Hong-zhen Lian, Xiaoyuan Ma
Summary: In this study, a high-performance SERS-active aptasensor was successfully developed for the quantitative analysis of AFB1 in cereal grains, which is of great significance in the field of food safety.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
E. Abas, C. Marina-Montes, C. Perez-Marin, J. Puimedon, J. Anzano
Summary: This study conducted a comprehensive measurement of natural and anthropogenic radionuclides in soil, water, and air in different locations around Deception Island in Antarctica. The results revealed significant levels of 210Pb and anthropogenic 137Cs in soil samples near old human settlements and facilities, as well as detectable levels of 137Cs and 60Co in water samples from old hunting areas. The findings also suggested potential resuspension processes based on higher-than-expected air quality results.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Joao Franciso Allochio, Nayara A. dos Santos, Nathalia dos S. Conceicao, Clara S. D. Baptista, Keyller B. Borges, Valdemar Lacerda Jr, Wanderson Roma
Summary: This study developed a fiber spray ionization mass spectrometry (FSI-MS) method, which shows great potential in detecting illicit drugs. Compared with paper spray ionization mass spectrometry (PSI-MS), FSI-MS demonstrates higher sensitivity in COC detection.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Dina A. Ahmed, Ola G. Hussein, Mamdouh R. Rezk, Mohamed Abdelkawy, Yasmin Rostom
Summary: The main goal of this study was to develop two green chromatographic techniques, HPLC and TLC, for the determination of alcaftadine (ALF) in pharmaceutical formulation and biological samples. The developed HPLC technique showed high efficiency and minimal environmental impact, successfully identifying ALF in the presence of its degradate. The TLC method provided a stability indicating study for ALF and was determined to be safe, green, and eco-friendly.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Yifan Zhang, Tong Zhang, Wenjing Ba, Li Liu, Yuan Rao, Xiaodan Zhang, Hanhan Zhang, Xiu Jin
Summary: This paper proposes a novel spectral transfer modelling method based on neural network architecture searching for the asymptomatic prediction of Akizuki pear cork spot disorder. The experiments show that the model by this method is more effective, achieving an accuracy of 82.61%.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Krzysztof Greda, Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: For the first time, a dispersive micro-solid phase extraction (D-mu SPE) based on graphene oxide was used for the ultrasensitive determination of Cd. With this method, Cd can be efficiently extracted from a mixture of alkali and alkaline earth metals without the need for an elution step. The combination of D-mu SPE and SAGD OES significantly reduces matrix effects and improves the tolerance of Cd to alkali metals. The method shows simplicity in the measurement system and the commercially available nanosorbent used.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
P. K. Fathima Anjila, G. R. Tharani, Anand Sundaramoorthy, Venkat Kumar Shanmugam, Karthikeyan Subramani, Shanmugavel Chinnathambi, Ganesh N. Pandian, Vimala Raghavan, Andrews Nirmala Grace, Singaravelu Ganesan, Mangaiyarkarasi Rajendiran
Summary: This work proposes a rapid and sensitive spectroscopic method for detecting melamine in food products using rare-earth Terbium-doped Graphene Quantum Dots (Tb-GQDs) synthesized by microwave and simple chemical conjugation methods. The synthesized Tb-GQDs show a spherical shape with a size of approximately 6 nm and a quantum yield of 52%. The maximum detection limit for melamine concentration in milk and milk products is found to be 0.31 μM. The dual emitting Tb-GQDs provide a sensitive and effective platform for real-time detection of melamine in food samples, particularly in milk, and show promising potential in the food industry.
MICROCHEMICAL JOURNAL
(2024)
Review
Chemistry, Analytical
Piyush Dey, Mandeep Kaur, Akhil Khajuria, Dilmeet Kaur, Manpreet Singh, Hema Kumari Alajangi, Neha Singla, Gurpal Singh, Ravi Pratap Barnwal
Summary: Environmental issues, such as the uncontrolled release of dangerous pollutants, have significant impacts on human health. Traditional methods for detecting pollutants require specialized personnel and equipment, but nanotechnology has improved the performance of biosensors. This article discusses the use of nanotechnology in pollutant detection and the associated techniques.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Sa Dong, Qiuyun Shi, Lingjun Guan, Yulong Wang, Pengyan Liu, Cunzheng Zhang, Jianguo Feng
Summary: In this study, a highly sensitive indirect competitive chemiluminescence enzyme immunoassay (icCLEIA) method was developed for the determination of sodium pentachlorophenolate (PCP-Na) and its metabolite pentachlorophenol (PCP). The method showed high specificity and affinity with a detection limit of 0.0032 ng/mL for PCP-Na and 0.0192 ng/mL for PCP. The method had no cross reaction with other chlorophenols compounds except for PCP. The average recoveries in chicken, pork and fish samples were 81.3-105.8% with low coefficient of variation (CV).
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Palaniappan Ilayaraja, Murugan Manivannan, Paramasivam Parthiban
Summary: Nirmatrelvir, an antiviral drug used for the treatment of COVID-19, has been recommended by the World Health Organization. We developed an optimized analytical method for the quantification of Nirmatrelvir and its products, with high sensitivity and a wide linear range. The method also meets the requirements for greenness evaluation.
MICROCHEMICAL JOURNAL
(2024)