Article
Construction & Building Technology
Marcos Lanzon, Maria Jose Madrid-Balanza, Izaskun Martinez-Peris, Victoria E. Garcia-Vera, David Navarro-Moreno
Summary: This study investigates the construction technique and characterisation of original mortars and wall paintings in the Roman Forum district of Carthago Nova, Spain. Various analytical methods were used to examine the materials, including optical microscopy, scanning electron microscopy, colour tests, and chemical composition analysis. The results show that the mortars have a multi-layered pattern, with the top layer primarily made of calcite and the central and bottom layers likely made of pozzolanic materials. Unusual minerals, such as cerussite, were found in some layers, possibly indicating post-Roman activities at the site. The wall paintings were decorated with red hematite, black graphite, and hydroxyapatite, suggesting the use of animal bones in the production of black pigments. Additionally, some fragments were coated with organic substances for color enhancement and durability. SEM examination and EDX analyses confirm these findings and reveal the presence of NaCl surface crusts due to natural weathering.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Spectroscopy
Susana E. Jorge-Villar, Howell G. M. Edwards
Summary: In Roman wall paintings, blue and green pigments were less commonly used compared to red and yellow due to their higher cost. The nomenclature and composition of these pigments, such as Egyptian blue for blue and celadonite, glauconite for green, sometimes lead to confusion. This study evaluates the Raman spectroscopic identification of Roman blue and green pigments used in wall paintings, aiming to clarify their nomenclature.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Rodica-Mariana Ion, Marius Gheorghe Barbu, Andrei Gonciar, Gabriel Vasilievici, Anca Irina Gheboianu, Sofia Slamnoiu-Teodorescu, Madalina Elena David, Lorena Iancu, Ramona Marina Grigorescu
Summary: The study identifies seven different pigments used in Roman murals and emphasizes the changes that occur when certain pigments are combined with organic beeswax. Analytical techniques have provided valuable information on the materials and techniques used in Roman mural paintings.
Article
Physics, Multidisciplinary
Laura Fornasini, Simona Raneri, Stefano Legnaioli, Vincenzo Palleschi, Antonella Casoli, Silvia Simeti, Danilo Bersani
Summary: The church of San Francesco del Prato in Parma, Italy, is a Gothic masterpiece from the 13th century. It was not appreciated for its historical and monumental value due to its transformation into a jail. Recent restoration works revealed valuable frescoes and wall paintings from different periods.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Anthropology
Giovanni Bartolozzi, Susanna Bracci, Barbara Sacchi, Marco Realini, Barbara Mazzei
Summary: The article discusses the stylistic inconsistencies found in a cubicle known as "of the bakers" in the first level of the Domitilla catacombs in Rome. A diagnostic campaign was conducted using non-invasive methods to identify pigments and materials with precision after a laser cleaning of the wall paintings.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Giovanna Fioretti, Gioacchino Tempesta, Salvatore Capotorto, Giacomo Eramo
Summary: This study presents the results of a non-invasive characterization of pigments and their mixtures in the wall paintings of a 10th century Byzantine church in Italy. Portable digital polarized microscopy, fiber optic reflectance spectroscopy and X-ray fluorescence spectroscopy were used for analysis. The findings identified various pigments, including red and yellow ochres, green earth, vine black, minium and Egyptian blue. The presence of pigment mixtures indicated the use of techniques by local medieval artists to imitate expensive pigments, contributing to the understanding of the artistic tradition of that time. The results were showcased using orthophotos extracted from a digital photogrammetric 3D model.
Article
Materials Science, Multidisciplinary
Gele Teri, Peng Fu, Kezhu Han, Jiaxin Li, Yanli Li, Zhihui Jia, Yongjin Wang, Yuhu Li
Summary: Color paintings have significant aesthetic value and historical importance. This study focused on the color paintings of the east pillar in the Taiping Heavenly Kingdom's Great Hall and found that the paintings used pigments such as vermilion, graphite, white lead, and lead red. The study also revealed the possible presence of tung oil and flour in the mortar. The analysis of pigments, inorganic fillers, and adhesives provides valuable information for the preservation of these paintings.
Article
Thermodynamics
Jose Luis Perez-Rodriguez, Maria Luisa Franquelo, Adrian Duran
Summary: Thermal analysis techniques such as TG, DTA and X-ray thermodiffraction are used in this study to evaluate and characterize pigments and supports of wall paintings from the San Isidoro del Campo Monastery in the 15th century. The different colors of the wall paintings are identified, along with the technology and raw materials used in their manufacture. The paintings were made using the fresco technique on support mortars made of calcite, quartz, and straw.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Applied
C. Manfriani, M. Zuena, L. Ruggiero, C. Lucarelli, S. Ridolfi, L. Tortora, A. Sodo
Summary: This work aims to create a scientific database to support the authentication of paintings on the art market. It characterizes five fake paintings attributed to Pippo Oriani and provides useful information on the materials and techniques used in the forgery process, supporting the authentication of other ambiguous paintings.
Article
Anthropology
Chiara Germinario, Sabrina Pagano, Mariano Mercurio, Francesco Izzo, Alberto De Bonis, Vincenzo Morra, Priscilla Munzi, Marcella Leone, Elisa Conca, Celestino Grifa
Summary: Excavations at Cumae unearthed the Tomba del Banchetto per l'Eternita, a hypogeum chamber tomb with a vaulted ceiling built in the first century BCE. The tomb's unique decorative scheme, resembling an Oscan tradition, depicts a banquet scene and funerary beds. Analysis of the plasters and pigments used in the tomb's decoration revealed the production techniques and materials employed.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Spectroscopy
Imane Fikri, Mohamed El Amraoui, Mustapha Haddad, Ahmed Saleh Ettahiri, Christophe Falgueres, Ludovic Bellot-Gurlet, Taibi Lamhasni, Saadia Ait Lyazidi, Lahcen Bejjit
Summary: A multi-analytical study was conducted to characterize wall paintings from al-Qarawiyyin university in Fez, dating back to the 9th century. The study aimed to identify the pigments used and determine the painting techniques employed by Moroccan craftsmen at that time. The investigation utilized various analytical techniques, such as Raman and ATR-FTIR, to examine color, structure, and elemental composition. The results revealed the pigments used to achieve different colors and shades, as well as the lime-secco-painting technique adopted.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Spectroscopy
Yacine Oubelkacem, Taibi Lamhasni, Abdelmajid El Bakkali, Saadia Ait Lyazidi, Mustapha Haddad, Abdelouahed Ben-Ncer
Summary: Two famous ancient parchments from the IXth century in the Islamic world were analyzed using various techniques to identify writing support materials, ink components, degradation phenomena, and corrosion prevention methods, as well as the use of different coloring materials.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Archaeology
Francesca Volpi, Mauela Vagnini, Riccardo Vivani, Marco Malagodi, Giacomo Fiocco
Summary: This study focuses on the non-invasive study and identification of red and yellow pigments frequently used in ancient wall-paintings, using portable instruments. Through comparisons between laboratory mock-ups and real samples, distinctive features of the pigments were identified, offering a new analytical method.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Spectroscopy
Nagore Prieto-Taboada, Silvia Fdez-Ortiz de Vallejuelo, Anne Santos, Marco Veneranda, Kepa Castro, Maite Maguregui, Hector Morillas, Gorka Arana, Alberta Martellone, Bruno de Nigris, Massimo Osanna, Juan Manuel Madariaga
Summary: The study focused on the degradation and conservation of the mural paintings in Ariadne's house in the archaeological park of Pompeii. Spectroscopic analyses revealed an older layer of paintings beneath the visible ones, providing evidence of the evolution of the social-economic status of the ancient owners.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Laura Bergamonti, Martina Cirlini, Claudia Graiff, Pier Paolo Lottici, Gerardo Palla, Antonella Casoli
Summary: This research uses a multi-analytical approach to detect and quantitatively characterize waxes in Vesuvian wall paintings. Various types of waxes from different origins were identified, along with the presence of hematite and Egyptian blue pigments.
APPLIED SCIENCES-BASEL
(2022)
Article
Geochemistry & Geophysics
Christian Koeberl, Billy P. Glass, Toni Schulz, Wencke Wegner, Gabriele Giuli, Maria Rita Cicconi, Angela Trapananti, Paola Stabile, Mariangela Cestelli-Guidi, Jisun Park, Gregory F. Herzog, Marc W. Caffee
Summary: This study comprehensively investigated the tektite-like glasses from Belize using various methods. The results suggest a close relationship between these glasses and Central American volcanics, particularly those from Guatemala and Honduras. The presence of possible meteoritic components was also identified.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Correction
Physics, Multidisciplinary
Monia Vadrucci, Cristina Cicero, Claudia Mazzuca, Fulvio Mercuri, Mauro Missori, Noemi Orazi, Leonardo Severini, Ugo Zammit
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Geochemistry & Geophysics
Giancarlo Della Ventura, Francesco Radica, Federico Galdenzi, Umberto Susta, Gianfelice Cinque, Mariangela Cestelli-Guidi, Boriana Mihailova, Augusto Marcelli
Summary: In this study, we investigated the dehydrogenation kinetics of riebeckite at high temperatures. We found that the dehydrogenation process is different in single crystals compared to powders, with the process in single crystals not being a purely first-order reaction. The release of water molecules from riebeckite requires the presence of external oxygen and oxidizing conditions at temperatures above 550 degrees Celsius.
AMERICAN MINERALOGIST
(2022)
Article
Archaeology
Mattia Titubante, Claudia Marconi, Lucia Citiulo, Adriano Mosca Conte, Claudia Mazzuca, Francesco Petrucci, Olivia Pulci, Manuel Tumiati, Shan Wang, Laura Micheli, Mauro Missori
Summary: We report a non-invasive and multi-analytical physico-chemical method for the characterization of paper artworks, able to identify sizing, inks, and glues and to quantify oxidative degradation by-products. The proposed methodology is mostly carried out in situ by using easy-to-use and cheap portable instrumentation for the acquisition of multispectral images, punctual ultraviolet-visible-near infrared fiber-optics reflectance spectroscopy (FORS) and punctual fiber optics fluorescence spectroscopy. Further analytical information is provided by non-invasive in-situ sampling of paper surface by using soft latex sponges, making possible laboratory chromatographic and infrared spectroscopic analyses on the aqueous sponge extracts. The proposed diagnostics method was applied to two 17th century letters written by St Francis of Sales (1567-1622), collected at the Chigi Palace in the town of Ariccia (Italy). Results show an intense oxidative degradation of the letters, also localized in water spots, and the presence of carboxylic acids by-products. Analysis of FORS spectra provided the concentration of chromophores in the paper substrate. The diagnostic method allowed the identification of gelatin sizing, the presence of starch glue in specific areas of the letters and the type of ink used in the text. Our diagnostic approach aims to offer to conservator-restorer a characterization of a paper artwork, that can be applied to other, for a correct planning of conservation interventions.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Materials Science, Multidisciplinary
M. Szubka, P. Zajdel, M. Fijalkowski, E. Talik, A. Balerna, M. Cestelli-Guidi, M. Romani, J. Lazewski, P. T. Jochym
Summary: This study attempted to synthesize materials with n = 3 and n = 4, but they were found to not exist as a single phase. Instead, their formula should be written as CaCoSi2O6 + (n-2)SiO2. Similar conclusions were drawn from various analyses, including quantitative XRD analysis, magnetic analysis, and electronic properties analysis. DFT ab initio calculations were also conducted to obtain the electronic signature of CaCoSi2O6. The excess of SiO2 was found to significantly influence the magnetic properties, possibly due to the presence and suppression of secondary phases.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Mauro Missori, Laura Pilozzi, Claudio Conti
Summary: This study proposes a terahertz photonic structure composed of dielectric rods layers made by low-cost, rapid, and versatile 3D printing. The spectral and dynamic response of the structures are studied using terahertz time-domain spectroscopy. The results show that the structures have specific spectral forbidden bands dependent on their optical and geometrical parameters and evidence of disorder in the 3D printed structure. The diffusion coefficient of terahertz radiation in the structures is estimated by studying the dynamics diffusion of the pulses.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Domenico Palumbo, Antonio Giorni, Rossella Minocchi, Roberto Amendola, Mariangela Cestelli Guidi
Summary: Machine learning regression methods were compared for the analysis of FTIR spectra of biological human serum samples, showing excellent prediction ability for Triglycerides, Cholesterol, HDL Cholesterol, and Urea using Partial Least Squares regression, Neural Networks and Support Vector regression. However, prediction ability for Glucose and Total Proteins was less accurate. Additionally, linear regression and utilizing the entire infrared spectrum without selecting spectral features showed superior performance.
VIBRATIONAL SPECTROSCOPY
(2022)
Article
Physics, Multidisciplinary
M. Romani, L. Pronti, C. Ruberto, L. Severini, C. Mazzuca, G. Viviani, A. Mazzinghi, M. Chiari, L. Castelli, F. Taccetti, A. Damiani, C. Gorga, M. Angelucci, M. Cestelli-Guidi
Summary: This study explored the application of cleaning treatments for the restoration of nineteenth-twentieth-century photographs. Two different cleaning methods, involving poly(vinyl alcohol)-based hydrogels and calcium chlorine, were used for albumen-based print and gelatin silver print restoration, respectively. Multi-analytical techniques were applied to characterize the constituent materials and preservation state of the photographs both before and after the cleaning treatments. The treatments successfully recovered the degraded parts of the photographs, especially in the case of the albumen-based print.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Archaeology
Lorenzo Teodonio, Claudia Scatigno, Mauro Missori, Giulia Festa
Summary: This article investigates watermarked papers from the Late Middle Ages in Italy, using machine learning and spectroscopy techniques to analyze the data and trace the fabrication recipes and geographical production of paper mills. The results show that watermarked papers from Northern Italy and Bologna have similar compositions, potentially influenced by local hand-made processing techniques and technological exchange between cities.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Materials Science, Multidisciplinary
Alessandra Conte, Giancarlo Della Ventura, Benjamin Rondeau, Martina Romani, Mariangela Cestelli Guidi, Carole La, Camilla Napoleoni, Federico Lucci
Summary: In this study, hydrothermal agates from Allumiere-Tolfa volcanic district in Italy were investigated using micro-textural, spectroscopic, and geochemical data. The results showed that the textures and trace element content of the SiO2 phases, as well as the presence of mineral inclusions, were influenced by physicochemical fluctuations of SiO2-bearing fluids. The enrichment of B and As in chalcedony-rich layers was attributed to pH fluctuations. The study also revealed an anticorrelation between moganite content and total water signal. The findings suggest a genetic scenario dominated by pH fluctuations in the circulating hydrothermal fluid.
PHYSICS AND CHEMISTRY OF MINERALS
(2022)
Article
Optics
Laura Pilozzi, Mauro Missori, Claudio Conti
Summary: In this study, the transition from Fano resonances to Bound states in the continuum (BIC) in a one-dimensional photonic crystal slab made of rectangular dielectric rods was investigated at terahertz frequencies. Symmetry-protected, high-Q BIC were found at normal incidence through simulations based on an analytical exact solution of the Maxwell equations. For non-normal incidence, BIC coupled with freely propagating waves and appeared as Fano resonances in the scattering field. The simulations were validated by 3D-printing the photonic crystal slab and comparing THz time-domain spectroscopy measurements.
Article
Environmental Sciences
Giuseppe Capobianco, Maria Luisa Antenozio, Giuseppe Bonifazi, Patrizia Brunetti, Maura Cardarelli, Mariangela Cestelli Guidi, Lucilla Pronti, Silvia Serranti
Summary: The aim of this study was to develop a new multi-analytical approach to evaluate chemical alterations and differences in the element content in relation to arsenic (As) in the As hyperaccumulator fern P. vittata. The results showed a significant correlation between As, potassium (K), iron (Fe), calcium (Ca) and manganese (Mn) contents. The proposed multi-analytical approach using mu-XRF, HSI and ATR-FTIR could be a promising strategy to monitor in-field phytoremediation approaches by directly controlling the As content in plants.
Article
Engineering, Biomedical
Marco Marinelli, Fabio di Martino, Damiano Del Sarto, Jake Harold Pensavalle, Giuseppe Felici, Luigi Giunti, Veronica De Liso, Rafael Kranzer, Claudio Verona, Gianluca Verona Rinati
Summary: A dosimetric system based on flashDiamond detector is proposed for measuring the instantaneous dose rate in ultra high dose rate electron beams. The system shows good signal to noise ratios and fast response time, enabling accurate measurements of absolute dose and instantaneous dose rate.
PHYSICS IN MEDICINE AND BIOLOGY
(2023)
Article
Chemistry, Physical
Lorenzo Gontrani, Elvira Maria Bauer, Alessandro Talone, Mauro Missori, Patrizia Imperatori, Pietro Tagliatesta, Marilena Carbone
Summary: The report investigates the relationship between synthesis methods and the size and morphology of copper oxide nanoparticles. It is found that hydrothermal synthesis without surfactants leads to spheroidal dandelion-like aggregates, while the addition of surfactants promotes directional growth of nanostructures. The structure and properties of the nanoparticles are studied using powder X-ray diffraction, scanning electron microscopy, and diffuse reflectance spectroscopy. The effect of morphology on electronic properties is evaluated using DRS, and the results are compared with computational models.
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)