Article
Chemistry, Analytical
P. Montoro-Leal, J. C. Garcia-Mesa, I Morales-Benitez, A. Garcia de Torres, E. Vereda Alonso
Summary: An automatic MSPE method combining MGO-based magnetic nanomaterial with HPLC-ICP-MS for arsenic speciation was developed, achieving automatic preconcentration and separation/determination of arsenic species with low LODs and high precision. The method was validated by analyzing Certified Reference Materials and recovery analysis of arsenic species in various samples, showing potential for routine monitoring of arsenic species in environmental waters and biological fluids.
Article
Chemistry, Analytical
Zhao Huang, Xiaolin Hou, Jixin Qiao, Xue Zhao
Summary: An analytical method based on ICP-MS/MS was developed to determine femtogram levels of 237Np, 239Pu, and 240Pu in environmental samples. By controlling the valence states of Np and Pu, consistent behavior was achieved and 242Pu was used as the chemical yield tracer. The method achieved a high decontamination factor and effectively eliminated interferences and peak tailing. It enables accurate determination of femtogram levels of 237Np, 239Pu, and 240Pu in samples with high U/Np and U/Pu atom ratios.
Article
Chemistry, Analytical
Chuqing Liu, Guiju Xu, Baoyu Li, Xiaoli Wang, Jin-Ming Lin, Ru-Song Zhao
Summary: A highly crystalline three-dimensional hydroxylated covalent organic framework (COF-301) was constructed as an adsorbent for solid phase extraction (SPE) of glucocorticoids. The adsorption mechanism of glucocorticoids on COF-301 was elucidated through theoretical studies. The COF-301-based SPE combined with liquid chromatography-tandem mass spectrometry achieved efficient preconcentration and determination of glucocorticoids residue in water samples, with good linearity, low limits of detection, and low relative standard deviations.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Hai-Long Jiang, Fang Xue, Jing Sun, Jin-Ming Lin, Chong Zhang, Xia Wang, Ru-Song Zhao
Summary: A novel magnetic ionic covalent organic framework (Fe3O4@EB-iCOFs) with ionic property, large surface area, and magnetic responsiveness was designed and synthesized for potential magnetic solid-phase extraction (MSPE) of perfluorinated compounds (PFCs). A method based on MSPE-HPLC-MS/MS was established for the determination of PFCs, showing excellent linearity, repeatability, low limits of detection, and satisfactory recoveries.
Article
Spectroscopy
Liang Yang, Wenting Bu, Ke Xiong, Yanqiu Yang, Tongzai Yang
Summary: This study developed a method for monitoring 99Tc in solid environmental samples. The use of alkali fusion instead of acid digestion ensured minimal loss of Tc during sample preparation. A simple separation method using TRU resin in alkaline solution was established, and water was used for elution and direct measurement of Tc. The method achieved high chemical recoveries and demonstrated fast and efficient analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Yu Tian, Zhigang Xu, Yuming Yang, Dan Wang, Zhimin Liu, Xiaoxi Si
Summary: A magnetic composite material was developed for detecting polychlorinated biphenyls, showing excellent selectivity and reproducibility. The material demonstrated low detection limits and high recoveries for PCBs, with potential for simple and cost-effective detection in environmental samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Alexander Urstoeger, Lilly Zacherl, Maximilian Muhr, Yasmin Selic, Monika Wenisch, Marcel Klotz, Michael Schuster
Summary: This study successfully extracted different types of silver-based nanoparticles (Ag-b-NPs) at environmentally relevant concentrations using magnetic solid phase extraction (MSPE) technique; environmentally relevant inorganic ions and TiO2 particles did not have a major effect on the extraction efficiency, but natural organic matter (NOM) could significantly reduce the efficiency if present at 1 mg L-1, which could be overcome by adding Ca2+ or increasing IOMP concentration.
Article
Infectious Diseases
Chak-Lun Chan, Hogan Kok-Fung Wai, Peng Wu, Siu-Wai Lai, Olivia Sinn-Kay Chan, Hein M. Tun
Summary: This study presents a methodology for simultaneous extraction and detection of antibiotic residues in animal and environmental samples. It can qualitatively detect 30 different antibiotics and has the potential for quantification of antibiotic residues.
Article
Chemistry, Analytical
Xin-Li Song, Hui Lv, Ke-Chao Liao, Dong-Dong Wang, Gui-Mei Li, Yi-Yao Wu, Qian-Yu Chen, Yue Chen
Summary: The layer-by-layer assembly technique was used to synthesize novel multiwalled carbon nanotubes (MWCNTs) on magnetic carbon (Fe3O4@C) nanospheres, which were then used to extract six perfluoroalkyl substances (PFAS) in environmental real water samples using ultra high-performance liquid chromatography coupled to tandem mass spectrometry. The as-synthesized sorbent MWCNTs@Fe3O4@C was employed for magnetic solid-phase extraction (MSPE). The as-prepared MWCNTs@Fe3O4@C showed wide linear ranges, low detection limits and good repeatability for the extraction and detection of PFAS in water samples, making it a promising material for environmental analysis.
Article
Biochemical Research Methods
Madson Moreira Nascimento, Gisele Olimpio da Rocha, Jailson B. de Andrade
Summary: A new dispersive micro-solid phase extraction method was developed for the simultaneous extraction of multiple classes of pesticides from water samples, with low detection limits and high enrichment factors, suitable for pesticide detection in environmental water samples.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Chemistry, Analytical
Wei Wang, R. Douglas Evans, Karla Newman, Rashid Khokhar
Summary: An online separation and preconcentration method using solid phase extraction and ICP-MS/MS was developed for rapid analysis of low levels of Sr-90 in various water/wastewater samples. The system has small sample volumes, minimal sample preparation, and a fast processing time, making it a powerful tool for environmental monitoring and analysis.
Article
Chemistry, Analytical
Pengchao Cao, Valerie Pichon, Catherine Dreanno, Kada Boukerma, Nathalie Delaunay
Summary: Several ion-imprinted polymers (IIPs) were synthesized for selective extraction of Cu(II) ions. The best IIP exhibited high specificity and good selectivity, with an adsorption capacity of 63 μg g(-1) and an enrichment factor of 24. The method was successfully applied to real samples and Brunauer-Emmett-Teller analysis showed the impact of post-treatment on the porous structure.
Article
Chemistry, Analytical
Hirofumi Tazoe, Hiroshi Amakawa, Katsuhiko Suzuki, Jun Nishioka, Takuya Hara, Hajime Obata
Summary: A new separation procedure was developed to determine the Nd isotopic composition in seawater, improving sample throughput and measurement reliability. This procedure, combined with multiple collector-ICP-MS, was successfully applied to analyze vertical seawater samples from the western subarctic gyre of the North Pacific Ocean, producing validated results.
Article
Environmental Sciences
Ersin Kilinc, Sadin Ozdemir, Annarita Poli, Barbara Niolaus, Ida Romano, Muhammed Bekmezci, Fatih Sen
Summary: An ecofriendly preconcentration method using Geobacillus galactosidasius sp. nov immobilized on Amberlite XAD-4 as an adsorbent was developed for Hg and Sn preconcentration. The method showed successful quantification of Hg and Sn concentrations in various real meal patterns.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Analytical
Fukai Li, Min Wang, Jian Zhou, MengRui Yang, TongTong Wang
Summary: Fe3O4@SiO2@CD nanoparticles show excellent magnetic responsiveness, uniform size distribution, and superior chemical affinities to FQs. The MSPEHPLC-MS/MS approach developed is suitable for sensitive quantification of trace levels of FQs in environmental water samples, demonstrating the potential of Fe3O4@SiO2@CD nanoparticles as a promising magnetic adsorbent.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Rogelio Rodriguez-Maese, Laura Ferrer, Victor Cerda, Luz O. Leal
MICROCHEMICAL JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Blanca G. Beltran, Victor Ramos-Sanchez, David Chavez-Flores, Rogelio Rodriguez-Maese, Edwin Palacio
JOURNAL OF CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
Mateo del Rio, Marina Villar, Santiago Quesada, Gemma Turnes Palomino, Laura Ferrer, Carlos Palomino Cabello
Summary: A silver-functionalized UiO-66 MOF with excellent affinity towards iodide was prepared and incorporated into a 3D printed device for efficient removal of radioactive iodine. The developed device showed high efficiency, excellent reusability, and recoveries above 90% in sewage water and hospital waste samples.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Analytical
Lindomar A. Portugal, Edwin Palacio, Victor Cerda, Joao H. Santos-Neto, Laura Ferrer, Sergio L. C. Ferreira
Summary: A simple, fast, and non-chromatographic methodology for inorganic antimony speciation was developed, allowing accurate determination of Sb(III) and Sb(V) at ultra-trace levels in water samples.
Review
Biochemistry & Molecular Biology
Victor Cerda, Sergio L. C. Ferreira, Piyawan Phansi
Summary: Lab-in-syringe is a new approach that integrates various analytical extraction steps inside a syringe, allowing fully automated dispersive liquid-liquid microextraction. It provides a simple instrumental setup for dispersion, where the organic and watery phases are aspirated into the syringe as quickly as possible. This technique is beneficial for preconcentration of analytes and interference elimination, especially in the determination of emerging contaminants.
Article
Chemistry, Analytical
Felisberto Goncalves Santos, Fernando Maya, Boaventura Freire dos Reis, Elias Ayres Guidetti Zagatto, Victor Cerda
Summary: A lab-in-syringe flow system using a solvent lighter than water for dispersive liquid-liquid micro-extraction is proposed for the spectrophotometric determination of lead in industrial residual waters. Xylene is selected as the alternative extracting solvent, providing a cleaner and more environmentally friendly approach. The method shows a high enrichment factor, a wide linear dynamic range, and a low detection limit, making it suitable for high sample throughput. Additionally, the proposed procedure has a small residue volume.
Review
Chemistry, Analytical
Piyawan Phansi, Sergio L. C. Ferreira, Victor Cerda
Summary: This work aims to revise programs used to obtain accurate equilibrium constants through multiple chained programs. The AutoAnalysis software is valuable for conducting experimental work, including potentiometric titrations. The POTENtit program detects problems in the data obtained with AutoAnalysis during the experimental work, such as the presence of metals in the sample and carbonation of the titrant. It also provides the standard potential of the working electrode and the ionic product of the solvent under the experimental ionic strength. The MINIPOT program refines the results obtained, including electrode calibration and equilibrium constants. These three programs have been updated to run in the Windows 10 environment.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Thermodynamics
J. E. De Leon-Ruiz, R. Beltran-Chacon, I Carvajal-Mariscal, A. Zacarias, R. Rodriguez-Maese
Summary: This study assesses the potential of utilizing shallow geothermal energy systems for indoor conditioning in precision agriculture. Experimental results show that shallow layers of the ground provide better solutions for meeting thermal demand, and pipe depth and pitch are the key factors affecting heat output variability.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Analytical
M. A. Vargas-Munoz, Julian Morales, Victor Cerda, Laura Ferrer, Edwin Palacio
Summary: A simple and low-cost field-deployable method using paper sensors combined with a 3D-printed portable platform has been developed for simultaneous determination of ammonia and sulfide. The method showed good precision and recovery rates when applied to anaerobic digester and wastewater samples. The advantages of this methodology include high precision, simple paper sensor preparation, and a reusable system.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Caio S. A. Felix, Adriano V. B. Chagas, Rafael F. de Jesus, Willams T. Barbosa, Josiane D. V. Barbosa, Sergio L. C. Ferreira, Victor Cerda
Summary: This work presents the synthesis and characterization of a new polymer with imprinted ions (IIP) for pre-concentration of uranium in natural waters. The polymer was synthesized using specific reagents and optimized experimental conditions were determined. The proposed method was successfully applied to determine uranium concentrations in water samples collected in Caetite, Bahia, Brazil, with high accuracy and precision.
Article
Biochemistry & Molecular Biology
Diego Barzallo, Jorge Benavides, Victor Cerda, Edwin Palacio
Summary: The development of a portable device through 3D printing enables colorimetric and fluorometric measurements for analytical applications in various fields. This device utilizes an LED as a radiation source and a webcam as a detector, with digital images being analyzed in real-time. The system is connected to a notebook for power supply without additional sources. The device was validated through comparison with conventional spectrophotometers and spectrofluorometers, demonstrating satisfactory precision and accuracy values.
Article
Chemistry, Analytical
Diego Barzallo, Edwin Palacio, Juan March, Laura Ferrer
Summary: A 3D printed device coated with Oasis MCX resin was developed for the extraction and analysis of sulfonamides. The device showed satisfactory quantification of seven sulfonamides with good linearity and precision. This miniaturized method is an efficient alternative for monitoring emerging contaminants in environmental water samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Nuanlaor Ratanawimarnwong, Patcharat Ruckchang, Supattra Yooram, Kriangsak Songsrirote, Kanchana Uraisin, Victor Cerda
Summary: A new design of a membraneless vaporization unit coupled with a specific flow system has been developed for the determination of trace levels of arsenic using a hydride generation process. The method achieved analysis of arsenic in the range of 10 to 100 μg L-1 with a detection limit of 8 μg L-1, and was applied to surface water samples with percent recoveries in the range of 94-110%. The results obtained from the new method for total arsenic were found to not be statistically different from those obtained using the ICP-OES method.
ANALYTICAL METHODS
(2021)
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).
