Article
Anthropology
Susana Sousa Gomes, Pedro Valerio, Vera Teixeira de Freitas, Carlos Fabiao, Antonio Monge Soares, Maria Fatima Araujo
Summary: In this study, lead artefacts were characterized to identify their sources and establish trade routes for food and textile products during Roman times. The results showed that lead sources were not only found in the Iberian Peninsula but also in North Africa, indicating long-distance trade between these regions.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2023)
Article
Chemistry, Applied
Xuming Kang, Yanfang Zhao, Zhijun Tan, Jinsong Ning, Yuxiu Zhai, Guanchao Zheng
Summary: Geographical traceability of marine bivalves is crucial for ensuring food quality and protecting the interests of consumers and importers. This study investigated the use of stable isotope ratio and element analysis combined with multivariate data analysis for tracing the origin of mussels. The results showed that these techniques can provide valuable information for identifying the geographical origin of mussels.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Environmental Sciences
Jiaxin Ye, Junjie Li, Pengcong Wang, Yongqiang Ning, Jinling Liu, Qianqian Yu, Xiangyang Bi
Summary: Based on enrichment factor, multivariate statistical analysis and isotope fingerprinting, this study comprehensively assessed the inputs and sources of heavy metals in different samples from an urban area. The results showed that traffic emissions are still an important source of heavy metals in the urban area, while the occurrence of metals in urban soils is controlled by natural sources and non-traffic anthropogenic emission. Therefore, multi-samples and multi-measures are necessary in the assessment of integrated urban environmental quality.
ENVIRONMENTAL POLLUTION
(2022)
Article
Geosciences, Multidisciplinary
Xingyu Liang, Bo Li, Xinyue Zhang, Huaikun Qin, Gao Li, Chengnan Zhang
Summary: The Fuli Pb-Zn deposit in Yunnan, China, is a significant deposit with approximately 0.3 million tons of lead and zinc reserves. The main sulfides in this deposit are sphalerite, galena, and pyrite, occurring in the interlayer fracture zone of the middle Permian Yangxin formation dolomite. The Fuli deposit exhibits different colors of sphalerite, which can be attributed to the presence of various elements.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Inkyeong Moon, Honghyun Kim, Sangjo Jeong, Hyungjin Choi, Jungtae Park, Insung Lee
Summary: This study analyzed the geochemical properties of heavy metal-contaminated soils from a Korean military shooting range, determining the chemical behavior of heavy metals through soil pH, concentration, mineral composition, and Pb isotopes. The results showed that the soils were heavily contaminated with Pb, with minor concentrations of Cu, Ni, Cd, and Zn, while arsenic was rarely detected. Lead minerals did not show clear transformation into secondary mineral phases.
APPLIED SCIENCES-BASEL
(2021)
Article
Marine & Freshwater Biology
Seonghu Choi, Man-Sik Choi, Dongjin Joe, Sojung Park, Jinwoo Kim, Kongtae Ra, Intae Kim, Kyung-Tae Kim, Kyoung-Seok Lee, Jean-Sun Lim
Summary: The spatial distributions of dissolved lead concentrations and stable Pb isotope ratios in the Ulleung Basin, East/Japan Sea, were investigated to identify the Pb source, the behavior of Pb in seawater, and the relationship between Pb isotopes and water masses. The results showed that Pb concentrations were highest in the surface layer and decreased with increasing water depth. Near the seafloor in the slope area, Pb concentrations increased due to diffusive flux from sediments. The study also found that the Pb isotope ratios were relatively constant among water masses, with surface ratios similar to coal from China and bottom ratios similar to Russian ore deposits and coal. The isotope ratios of the intermediate layer were constant across the depths of East Sea Central Water and similar to aerosols measured around Ulleung Island, indicating the timing of ESCW formation.
OCEAN SCIENCE JOURNAL
(2022)
Article
Geochemistry & Geophysics
Le Zhang, Sheng-Ping Qian, Nan Li, Lu-Bing Hong, Yan-Qiang Zhang, Zhong-Yuan Ren
Summary: This study presents a method for simultaneously measuring Pb isotopes and trace elements in melt inclusions using a laser ablation system coupled to multiple ICP-MS instruments. The method showed little analytical bias and high precision when analyzing geological reference glasses. The Pb isotope ratios and trace element contents of plagioclase-hosted melt inclusions were successfully measured using this method.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Nurgul Balci, Yagmur Gunes, Fatih Sekerci, Erol Sari
Summary: The geochemistry of two contrasting depositional sites in a historical Pb-Zn mine tailings in Balya, Turkey were characterized to trace the source of sulfate and elucidate oxidation pathways of sulfide mixtures. The differences in sulfur isotope values appeared to be reflective of the extent of oxidation of sulfides under different conditions, with incomplete oxidation leading to low sulfate concentrations and acidic pH values. The values of delta O-18SO4 were enriched in the tailings sites, indicating enhanced galena and/or sphalerite oxidation relative to pyrite.
APPLIED GEOCHEMISTRY
(2021)
Article
Environmental Sciences
Feifei Deng, Steffen Hellmann, Tristan Zimmermann, Daniel Proefrock
Summary: By measuring Sr, Nd, and Pb isotopes in sediments collected from the Weser River Basin in Germany, it was found that metal and metalloid concentrations were higher than crustal abundance, with varying ranges of isotopic ratios indicating different influences. Cluster and principal component analysis of the isotope data supported the use of statistical analysis as an unsupervised tool in isotope fingerprinting studies. The distinct isotopic signatures of the Weser sediments compared to those from the Elbe River suggested potential for using isotopic data to differentiate riverine input between the two rivers.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Junji Zhang, Zeming Shi, Shijun Ni, Xinyu Wang, Chao Liao, Fei Wei
Summary: The study found that Cd and Pb concentrations in the farmland topsoil exceed the background value of Chinese soil elements, and are influenced by human activities, increasing following the flow direction of the river. Lead isotope analysis indicates that the main sources of Pb in the soil include air dust, coal, and phosphate plant.
Article
Environmental Sciences
Xiaoqian Deng, Yuling Wu, Ye Liang, Longjiang Mao, Zhihai Tan, Wanzhu Feng, Yuanzhi Zhang
Summary: Urban river runoff is a significant pathway for heavy metal pollution in coastal areas, with the study identifying the Shawang River and Linhong River as the most polluted rivers. Heavy metals in the river sediments were found to originate from both anthropogenic and natural sources, with lead mainly coming from natural sources, leaded gasoline vehicle exhausts, and coal combustion, and strontium from natural and anthropogenic sources. Isotope analysis revealed that anthropogenic inputs were the predominant source of heavy metals in the urban river sediments flowing into Haizhou Bay.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geochemistry & Geophysics
Meng Chen, Tao Ren, Shenjin Guan
Summary: The Fule deposit is a Cd-, Ge-, and Ga-enriched Pb-Zn deposit in China. It contains two generations of pyrite, with the first generation formed in the sedimentary diagenetic stage and the second generation formed in the hydrothermal mineralization stage. The sulfur in the deposit is derived from bacterial sulfate reduction (BSR) and thermochemical sulfate reduction (TSR).
Article
Construction & Building Technology
Anera Kazlagic, Stephan Dietmar, Markus Ostermann, Antonio Possolo, Jochen Vogl
Summary: This study uses isotopic and interelement ratios of Sr-87/Sr-86 and Nd-143/Nd-144, combined with Ca, Sr, K, Mn, Mg, and Ti, to identify the origin of ordinary Portland cements (OPCs). A database of Sr and Nd isotope ratios in OPCs from 29 cement plants worldwide was created. The results show that OPCs have higher Sr isotope ratios compared to seawater from the observed geological period. The combination of Sr and Nd isotope ratios can distinguish between cements from different production sites, and divisive hierarchical clustering was used to overcome equivocal results. The successful fingerprinting of 27 out of 29 OPCs analyzed was achieved through this method.
ADVANCES IN CEMENT RESEARCH
(2023)
Article
Geochemistry & Geophysics
Xingyu Liang, Bo Li, Chengnan Zhang, Huaikun Qin, Gao Li, Xinyue Zhang
Summary: The Fuli Pb-Zn deposit in eastern Yunnan, China, belongs to Mississippi Valley-Type (MVT) deposits. The study on this deposit provides important information on the evolutionary process of metallogenic fluids and is crucial for exploration purposes.
Article
Environmental Sciences
Adam Laycock, Simon Chenery, Elizabeth Marchant, Helen Crabbe, Ayoub Saei, Ekaterine Ruadze, Michael Watts, Giovanni S. Leonardi, Tim Marczylo
Summary: The incidence of lead poisoning in children in Georgia is a major health concern, with some spice and dust samples found to be the likely sources of lead in the blood. However, soil, paint, and dust sources with high lead concentrations were found to not contribute significantly to blood lead levels.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Biochemistry & Molecular Biology
Elisa Palma, Hugo M. Botelho, Goreti Ribeiro Morais, Ines Rodrigues, Isabel Cordeiro Santos, Maria Paula Cabral Campello, Paula Raposinho, Ana Belchior, Susana Sousa Gomes, Maria Fatima Araujo, Isabel Correia, Nadia Ribeiro, Sofia Gama, Filipa Mendes, Antonio Paulo
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY
(2019)
Article
Archaeology
P. Valerio, I. P. Cardoso, M. Santiago, M. F. Araujo, L. C. Alves, M. A. Gocalves, R. Mataloto
Article
Engineering, Chemical
Leonor Maria, Adelaide Cruz, Jose M. Carretas, Bernardo Monteiro, Catarina Galinha, Susana S. Gomes, M. Fatima Araujo, Isabel Paiva, Joaquim Marcalo, Joao P. Leal
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Article
Anthropology
Pedro Valerio, Maria Fatima Araujo, Antonio M. Monge Soares, Luis C. Alves, Rui M. Soares, Linda Melo, Lidia Baptista
Summary: The recently excavated necropolises in Esfola and Monte do Bolor 1/2 in Beja, Portugal, revealed funerary items mainly made of low-tin bronze alloys, with some exceptions of copper or leaded bronze. These findings suggest an indigenous metallurgy influenced by earlier Phoenician stimuli, although the potential to achieve different colors by changing alloy compositions was not commonly utilized.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2021)
Article
Archaeology
Nelson J. Almeida, Ana Catarina Basilio, Celia Silva, Antonio Monge Soares, Nelson Borges
Summary: This study examines three Chalcolithic pits from the complex of ditched enclosures in Monte das Cabeceiras 2, Beja, with a focus on zooarchaeology and taphonomy. The analysis of filling sequences, material culture, and human remains sheds light on the social practices related to animal management during the Chalcolithic period in Southwestern Iberia. The presence of structured deposits with animal remains in the pits suggests possible feasting or ritual offerings, providing insights into the cultural practices of the time.
ZEPHYRUS-REVISTA DE PREHISTORIA Y ARQUEOLOGIA
(2021)
Article
Anthropology
Pedro Valerio, Rui M. Soares, Rui J. C. Silva, Antonio M. Monge Soares, Maria Fatima Araujo
Summary: Archaeological works at Cabeco Redondo in southern Portugal have uncovered the remains of a monumental building from the 6th-5th century BC, with artifacts and architecture consistent with the post-Orientalizing contexts of the time. The metal debris found at the site, including copper ingots and various tools and ornaments, were studied using micro-EDXRF, optical microscopy, and SEM-EDS to determine their composition and manufacturing processes. The majority of the metal debris was pure copper, with some examples of bronze and leaded bronze. The artifacts mainly consisted of low-tin bronze and leaded bronze alloys. The study also compared the features of the metal debris and artifacts with other contemporary sites in the region to better understand the technological patterns of the southwestern Iberian Peninsula during the middle of the first millennium BC.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Anthropology
Pedro Valerio, Jorge Estevao Correia, Vitoria Corregidor, Rui J. C. Silva, Rui M. Soares, Rui Ramos, Pedro Albuquerque, Luis Miguel G. Cabrita, Lucia Miguel, Mariana Nabais, Luis Campos Paulo, Antonio M. Monge Soares, Maria Fatima Araujo
Summary: The study examines gold jewellery from archaeological sites in southern Portugal dating back to the 1st millennium BC. It focuses on two exceptional plaques depicting Mesopotamian iconography, two rings known as nezems, and a fragment of an earring or pendant. Various techniques, including p-EDXRF, SEM-EDS, optical microscopy, and reflectance transformation imaging, were used to analyze the production techniques, composition, and iconographic motifs of the jewellery. The study reveals different manufacturing processes, variable silver contents (11-39 wt%), and relatively constant copper amounts (1.8-2.5 wt%). The composition of individual items provides insights into associations, economic factors, and the gold alloys used by ancient goldsmith workshops.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Jose M. Carretas, Luis M. Ferreira, Pedro M. P. Santos, Susana S. Gomes, Maria Fatima Araujo, Leonor Maria, Joao Paulo Leal
Summary: In this study, methods to extract lanthanides from low-concentration aqueous solutions were explored. The use of chitosan-based membranes showed promising results, with a high concentration factor and low cost. The chitosan membranes could extract around 10 mg of lanthanides per gram of membrane.
Article
Archaeology
Pedro Valerio, Joaquina Soares, Luis C. Alves, Rui J. C. Silva, Maria Fatima Araujo, Carlos Tavares da Silva
Summary: Recent archaeological excavations at Castro de Chibanes in Portugal uncovered prehistoric remains from 2500-1900 cal BC, including ceramic crucibles and metal artefacts. Chemical and microstructural analysis revealed local copper production with varying arsenic contents, suggesting limited compositional homogenisation during post-casting manufacture. Comparison with other Chalcolithic settlements in the region indicates a broader context of metal production and use during the 3rd millennium BC. Furthermore, a previously identified bronze Bell Beaker tanged dagger was found to be composed of a leaded bronze alloy with a unique microstructure containing Cu-Fe sulphides with high Se contents, prompting a reassessment of its typology and chronology.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2023)
Article
Humanities, Multidisciplinary
Rute Correia Chaves, Joao Pedro Veiga, Antonio Monge Soares
Summary: This research analyzed the texture, chemical composition, and mineral composition of Chalcolithic pottery from three different phases in the Lisbon region of Portugal. The results suggest that the production techniques of the pottery remained similar throughout the Chalcolithic period, with firing temperatures between 700 and 800 degrees Celsius. The pottery also used multiple sources of raw materials.
Article
Archaeology
Pedro Valerio, Rui J. C. Silva, Antonio M. Monge Soares, Maria Fatima Araujo, Joao Luis Cardoso
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2020)
Article
Archaeology
Antonio M. M. Soares, Pedro Valerio, Susana S. Gomes, Rui Mataloto, Sofia M. Soares, Rui J. C. Silva, Rui M. Soares
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2020)
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)