Article
Chemistry, Applied
Franciele Rovasi Adolfo, Paulo Cicero do Nascimento, Leticia Brudi, Denise Bohrer, Leandro Machado de Carvalho
Summary: This paper describes a method for the simultaneous determination of Ba, Co, Fe, and Ni in nuts using high-resolution continuum source atomic absorption spectrometry. The results of the extraction method suggest that the technique is accurate and reliable.
Article
Chemistry, Analytical
Arlene Santos Silva, Geovani Cardoso Brandao, Sergio Luis Costa Ferreira, Ana Maria Pinto dos Santos
Summary: An analytical method for the multielemental determination of Cd, Fe and Ni in toothpaste using slurry sampling high-resolution continuum source electrothermal atomic absorption spectrometry (HR-CS ET AAS) was reported. The method was successfully applied to analyze five toothpaste samples of different brands, demonstrating accurate and reliable results.
ANALYTICAL LETTERS
(2022)
Article
Chemistry, Analytical
Alan L. Vieira, Edilene C. Ferreira, Silvana R. Oliveira, Fernando Barbosa, Jose A. Gomes Neto
Summary: Dried Blood Spot (DBS) was evaluated as a solid sampling strategy for Fe and Zn determination in blood samples using Solid Sampling High-Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry (SS HR-CS GF AAS). Results showed good correlation between the area of DBS and blood volume, as well as improved stability and peak profile of Zn with the use of chemical modifier. The proposed method provided accurate Fe and Zn determination results with a high sample throughput.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Daniel E. Bustos, Juan A. Toro, Marisol Briceno, Ricardo E. Rivas
Summary: In this study, a methodology for the simultaneous determination of Cd and Ni in powder chocolate samples using high-resolution continuum source graphite furnace atomic absorption spectroscopy (HR-CS-GF-AAS) and slurry sample analysis was developed. This method eliminates the need for acid digestion of the samples and shows no deterioration of the graphite tubes. Simultaneous quantification of Cd and Ni was achieved by using a slow heating ramp atomization.
Article
Geography, Physical
Yuwei Zhang, Peng Liu, Lajiao Chen, Mengzhen Xu, Xingyan Guo, Lingjun Zhao
Summary: This paper proposes a high-resolution multi-source remote sensing dataset GF-FloodNet for flood area extraction, which contains 13388 samples from Gaofen-3 and Gaofen-2 images. The dataset is constructed using a multi-level sample selection and interactive annotation strategy based on active learning. Experimental results show that GF-FloodNet has significant advantages in multi-source data and can support different deep learning models for training to extract flood areas.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Chemistry, Analytical
Franciele Rovasi Adolfo, Paulo Cicero do Nascimento, Leticia Brudi, Denise Bohrer, Leandro Machado de Carvalho, Margareth C. Coutinho Cravo, Luis Nascimento
Summary: A method based on EIEB was developed for the determination of Cr, Cu and Mn in asphalt, with high extraction efficiency and low detection limits. Compared to other sample preparation methods, EIEB showed the best performance for Cu determination, while for Cr and Mn determination, EIEB, MW-AD, and DD procedures yielded better results.
Article
Spectroscopy
Ondrej Zverina, Monika Vychytilov, Jaqueline Rieger, Walter Goessler
Summary: This article presents a rapid and accurate method for determining the zinc and iron content in food using high-resolution continuum source graphite-furnace atomic absorption spectrometry. By monitoring a narrow spectral interval, both elements can be measured simultaneously in a single firing, making the analysis fast and sensitive. Analysis of a large set of vegetable samples indicates higher zinc and iron contents in homegrown vegetables compared to store-bought ones.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Pengpeng Wang, Chunmei Ding, Yuting Deng, Haibo Chi, Haibing Zheng, Lin Liu, Hao Li, Yongkuan Wu, Xuan Liu, Jingying Shi, Can Li
Summary: Loading an individual Ni-Fe oxyhydroxide layer on a Ta3N5 photoanode can significantly enhance the photocurrent density and improve the efficiency of the PEC water oxidation system. The Ni-Fe oxyhydroxide layer functions as both a hole-storage layer and a cocatalyst, providing new insights into the charge transfer process.
Article
Chemistry, Physical
Pengpeng Wang, Chunmei Ding, Yuting Deng, Haibo Chi, Haibing Zheng, Lin Liu, Hao Li, Yongkuan Wu, Xuan Liu, Jingying Shi, Can Li
Summary: Loading an individual Ni-Fe oxyhydroxide layer on a tantalum nitride (Ta3N5) photoanode achieves a photocurrent density of up to 9.80 mA cm-2 for the water oxidation reaction, with a significant enhancement in the applied bias photon-to-current efficiency from 0.1 to 1.66%. The Ni-Fe oxyhydroxide layer plays bifunctional roles of a hole-storage layer and cocatalyst simultaneously, with Ni species contributing to hole-storage capacity and Fe species coupled with Ni contributing to catalytic functionality.
Article
Chemistry, Physical
Shuang Sheng, Yanpeng Song, Linna Sha, Ke Ye, Kai Zhu, Yinyi Gao, Jun Yan, Guiling Wang, Dianxue Cao
Summary: The study introduces a high-efficiency self-supported bifunctional electrocatalyst consisting of hierarchical nickel-iron phosphide nanosheets grown directly on nickel foam, which show promising performance in ethanol oxidation reaction and hydrogen evolution reaction. The assembled hybrid ethanol-water electrolyser requires lower voltage for operation than traditional water splitting, showcasing potential for energy-saving hydrogen generation and ethanol oxidation applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Kenichi Nakayama
Summary: This article describes a procedure using flame atomic absorption spectrometry for specimen preparation to quantify tungsten in alloyed tool steel and high-speed steel. The sample solution was prepared using a microwave-assisted digestion with a mixed acid of hydrofluoric, nitric, and phosphoric acids. Vanadium was added as an internal standard element to accurately and precisely measure tungsten and vanadium absorption lines simultaneously using a spectrometer equipped with a multi-wavelength system.
ISIJ INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Beatriz Gomez-Nieto, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: The study optimized a direct solid sampling method based on HR-CS GFAAS for the determination of selenium in biological tissues. Different chemical modifiers and an optimal sample mass range were used to achieve stable results.
ANALYTICA CHIMICA ACTA
(2022)
Article
Engineering, Chemical
Sayed Zia Mohammadi, Farideh Mousazadeh, Somayeh Tajik
Summary: Co-administration of DAS and DOX can improve the treatment of breast cancer. A novel Ni-Fe LDH-based DOX sensor was successfully constructed, showing favorable electrocatalytic behavior towards DOX and DAS detection. The sensor exhibited a broad linear relationship with DOX concentrations and a low limit of detection.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Ahmadreza Riyahi Khorasgani, Julia Kundin, Olga Lukianova, Neelamegan Esakkiraja, Aloke Paul, Sergiy Divinski, Ingo Steinbach
Summary: This study investigates the impact of interstitial carbon on the thermodynamics-kinetics coupling in CoCrFeMnNi-based High Entropy Alloys. Through calculations, modeling, and simulations, the study reveals the mutual influence of carbon and matrix elements diffusion and the non-monotonous dependence of chromium diffusion on carbon content.
Article
Electrochemistry
Susumu Arai, Koyuru Tomiita, Masahiro Shimizu, Haruhi Narita
Summary: This study successfully electrodeposited Fe-Ni alloy films with invar alloy compositions from a stable citrate bath. The effects of pH and current density on the film composition and microstructure were investigated. The results showed that under specific conditions, smooth films consisting of sub-micron particles were obtained.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Lucia Abad-Gil, Sergio Lucas-Sanchez, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: A high-performance liquid chromatography (HPLC) method with two in-line detectors was developed for the detection and quantification of preservatives in personal care products. The method successfully analyzed various types of personal care products containing common preservatives.
MICROCHEMICAL JOURNAL
(2021)
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
Beatriz Gomez-Nieto, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: The study optimized a direct solid sampling method based on HR-CS GFAAS for the determination of selenium in biological tissues. Different chemical modifiers and an optimal sample mass range were used to achieve stable results.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Sergio Lucas-Sanchez, Lucia Abad-Gil, Carmen Isabel-Cabrera, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: This study presents an HPLC method with electrochemical detection using disposable screen-printed electrodes (SPE) for simultaneous determination of 6 different parabens in personal care products. The electrochemical behavior of parabens was studied on different carbon-based materials, and the most suitable conditions were chosen. A fast ultrasound-assisted extraction method was applied to extract the parabens from complex-matrix cosmetic products. The proposed method is versatile, fast, and has been successfully applied to commercial samples.
Article
Chemistry, Analytical
Lucia Abad-Gil, Sergio Lucas-Sanchez, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: This paper presents an HPLC method with electrochemical detection using a gold electrode for the determination of the most commonly used antimicrobial agents in cosmetic products. The method has low limits of detection and can successfully analyze cosmetic products with different compositions.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Beatriz Gomez-Nieto, Carmen Isabel-Cabrera, Maria Jesus Gismera, Maria Teresa Sevilla, Jesus R. Procopio, Maria Isabel Sanchez de Rojas
Summary: A slurry sampling method was developed for the fast determination of Pb, Ni, Fe, and Mn in construction materials by HR-CS GFAAS. Stable slurries were prepared by sonicating the solid sample in Triton X-100 and HNO3 solution. The method was validated by analyzing a certified reference material and showed statistically comparable results to the digestion method.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Lucia Abad-Gil, Mayte Garcia-Rios, Carmen Isabel-Cabrera, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: A new HPLC-ECD method employing a sensing platform based on screen-printed carbon electrodes modified with composites of polystyrene sulfonate and oxidized multi-walled carbon nanotubes has been developed for the determination of synthetic phenolic antioxidants in cosmetics. The method provides optimal separation conditions and achieves high sensitivity, accuracy, and repeatability, making it suitable for analysis of cosmetic samples.
Article
Chemistry, Analytical
Lucia Abad-Gil, M. Jesus Gismera, M. Teresa Sevilla, Jesus R. Procopio
Summary: An electrochemical sensor was developed using screen-printed carbon devices modified with photochemically synthesized gold nanoparticles to detect benzyl alcohol in cosmetics. The synthesis of the gold nanoparticles was optimized using chemometric tools, and the anodic current of benzyl alcohol on the modified devices was used as the response. The nanocomposite-based sensor showed a detection limit of 2.8 μg/mL and was successfully applied to determine benzyl alcohol in cosmetic samples.
Article
Chemistry, Analytical
Qian Wu, Li Tian, Xiangyu Shan, Huiling Li, Chao Li, Juan Lu
Summary: A novel ECL sensor was developed by modifying Fe3CuO4-Ru(bpy)3+ and GO-CdS@ZnS on the electrode for the detection of permethrin. The sensor exhibited high sensitivity and a wide detection range.
Article
Chemistry, Analytical
Tingting Gong, Lei Liao, Bingying Jiang, Ruo Yuan, Yun Xiang
Summary: In this study, a fluorescent biosensing system for high sensitivity detection of MT was established using a new Ag+-stabilized DNA triplex probe (Ag+-SDTP) combined with catalytic hairpin assembly (CHA) and CRISPR/Cas12a signal enhancements. The sensing method is able to selectively detect MT from other non-specific molecules and can achieve low level detection of MT in diluted human serums, demonstrating its potential for monitoring disease-specific MT biomarker at trace levels.
Article
Chemistry, Analytical
Estrella Sanz Rodriguez, Kyra Wood, Paul R. Haddad, Brett Paull
Summary: This study presents a simple, rapid, and reliable method for determining boron in aqueous solutions using suppressed ion chromatography coupled to electrospray ionisation-triple quadrupole mass spectrometry. The method achieved a low limit of detection and demonstrated excellent analytical performance.
Article
Chemistry, Analytical
Aline Cournut, Paul Moustiez, Yannick Coffinier, Christine Enjalbal, Claudia Bich
Summary: Alzheimer's disease is a major cause of senile dementia and is characterized by the aggregation of neurofibrillary tangles and amyloid plaques in the brain. The A beta 1-42 peptide is considered the primary cause of neurotoxicity due to its insolubility and subsequent aggregation. A beta 1-42 and A beta 1-40 have been identified as relevant biomarkers for AD diagnosis, and SurfaceAssisted Laser Desorption/Ionization Mass Spectrometry (SALDI-MS) was used to monitor the A beta 1-42/A beta 1-40 ratio without prior sample treatment.
Article
Chemistry, Analytical
Dotse Selali Chormey, Buse Tugba Zaman, Tulay Borahan Kustanto, Sezin Erarpat Bodur, Suleyman Bodur, Elif Ozturk Er, Sezgin Bakirdere
Summary: This review provides an overview of the harmful effects of endocrine disrupting chemicals (EDCs) on human health and introduces the methods for analyzing EDCs. Recent research has focused on using green chemicals, such as deep eutectic solvents (DESs), for microextraction to ensure environmental safety.
Article
Chemistry, Analytical
Yan Zhang, Renfeng Xu, Jingjing Wu, Zhenghong Zhang, Yuhuang Wang, Hongqin Yang, Sheng Zhang
Summary: This study visualized the pore-like structures in prostate cancer cell membranes after treatment with the anticancer drug paclitaxel, demonstrating its mechanism of action related to oxidative damage.
Article
Chemistry, Analytical
Chihong Ma, Qin Zhou, Jinjin Shi, Hua Gao, Di Huang, Huimin Xue, Han Wang, Zhenzhong Zhang, Sen Yang, Junli Zhang, Kaixiang Zhang
Summary: We developed a CRISPR-empowered electrochemical biosensor, named PER-E-CRISPR, for amplification-free and sensitive detection of miR-21. The biosensor combines the advantages of CRISPR/Cas13a and primer exchange reaction (PER) for target amplification. Under optimized conditions, the PER-E-CRISPR assay exhibits a linear range from 10-13 to 10-7 M and a limit of detection of 30.2 fM. The biosensor shows excellent performance in actual plasma, indicating promising prospects for miRNA detection in molecular diagnosis.
Article
Chemistry, Analytical
Gang Liang, Jie Zhao, Yufei Gao, Tao Xie, Jianhui Zhen, Ligang Pan, Wenwen Gong
Summary: Molecular docking (MD) analysis is widely used for studying the interaction between aptamers and small molecules. This study established steady-state aptamers of tertiary structures (SATS) using specific aptamers of tetracycline antibiotics as docking models. Molecular docking results revealed multiple binding sites in the SATS of aptamers, with significant variations in binding free energy (BFE) and docking score (DS). The study also proposed a method for MD analysis based on SATS, providing insights into binding mode and predicting binding sites.
Article
Chemistry, Analytical
Yixuan Xu, Changchang Teng, Huiping Dang, Dalong Yin, Lifeng Yan
Summary: Stable organic radical molecules with high NIR fluorescence quantum efficiency have been synthesized and encapsulated into nanoparticles, which show great potential for both photodynamic therapy (PDT) and photothermal therapy (PTT) of tumors.
Article
Chemistry, Analytical
Yu Su, Dandan Yang, Yanjie Wang, Jie Ding, Lan Ding, Daqian Song
Summary: In this study, a highly selective molecularly imprinted polymer Cu-MIPs@CS was designed and synthesized for bisphenol A (BPA). Cu-MIPs@CS showed significantly enhanced imprinting factor and selective factor towards BPA compared to MIPs@CS. It also exhibited superior discrimination ability between BPA and its structural analogue. Additionally, Cu-MIPs@CS were successfully applied as a solid phase extraction adsorbent for the determination of BPA in drinking water samples.
Article
Chemistry, Analytical
Yi Qiao, Qiongdan Zhang, Yukun He, Tianguang Cheng, Jing Tu
Summary: Single cell heterogeneity plays an important role in many biological phenomena, and distinguishing cells with specific mutations is beneficial for clinical diagnosis and drug screening. This study introduces a gel plate platform that can distinguish cell types based on their phenotypes, with low equipment requirement. The gel platform has potential in point-of-care circumstances and single-cell stimulation responses that prioritize efficiency and simplicity.
Article
Chemistry, Analytical
Chengke Wang, Shuyang Sun, Ping Wang, Huawei Zhao, Wenling Li
Summary: The food safety of aquatic products is a global concern. Nanotechnology-based analyses have advantages in the detection of bacteria, metal ions, and small molecule contaminants. This review summarizes the recent advances in biosensing strategies for aquatic products and highlights the application of nanomaterials, lateral flow-based biosensors, surface-enhanced Raman scattering, microfluidic chips, and molecular imprinting technologies.
Article
Chemistry, Analytical
Liping Zhu, Zeng Tang, Xuemei Zhang, Li Zhu, Tian Meng, Linying Yu, Ting Xiao, Shasha Lu, Xiaoli Xiong, Xiurong Yang
Summary: A sensitive off-on electrochemiluminescence DNA sensor was developed using Exo III-assisted cascade amplification system. The sensor achieved high selectivity and ultra-high sensitivity in detecting target DNA by utilizing ECL and SPR effects. This study provides a new perspective for designing highly sensitive and programmable ECL biosensors.
Article
Chemistry, Analytical
Tong Li, Mengxu Sun, Suping Xia, Ting Huang, Rong-Tian Li, Chunrong Li, Zong Dai, Jin-Xiang Chen, Jun Chen, Nuan Jia
Summary: Here, we developed a binary system based on DNA tetrahedron and fluorogenic RNA aptamers for highly specific and label-free mRNA imaging in living cells. This system achieved high specificity label-free detection of nucleic acids with a detection limit of 1.34 nM. The method has potential applications in early disease diagnosis and new drug development.
Article
Chemistry, Analytical
Yao Zhao, Shu Zhang, Wang Yao, Yuxuan Zhu, Jing Qian, Juan Yang, Nianjun Yang
Summary: A new hierarchical nanostructured composite with high conductivity and catalytic activity is synthesized. The sensor exhibits significant catalytic effect and high sensitivity for monitoring the environmental endocrine disruptor bisphenol A (BPA).