Article
Biochemical Research Methods
Mikel Musatadi, Claudia Caballero, Leire Mijangos, Ailette Prieto, Maitane Olivares, Olatz Zuloaga
Summary: In this study, a target analysis method was developed to simultaneously determine 24 endocrine-disrupting compounds in urine samples. The method was optimized, validated, and applied to volunteers' samples, showing successful quantification of 67% of the target compounds. Additionally, suspect and non-target screening methods were developed using LC-MS/MS, allowing for the identification of various compounds in urine samples.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Polymer Science
Maria Salem Ibrahim, Manaa S. Alabbas, Khalid U. Alsomaly, Abdullah A. AlMansour, Alhareth Abdulaziz Aljouie, Majed M. Alzahrani, Ahmed A. Asseri, Jehan AlHumaid
Summary: This study assessed the remineralizing abilities of different bioactive pit and fissure sealants and compared their flexural strength and elastic modulus. The results showed that BioCoat (Bc) and BeautiSealant (Bu) sealants performed well in terms of remineralization, with Bc sealant showing the highest flexural strength.
Article
Environmental Sciences
Rebekah Gray, Eve Painter, Jameson W. Sprankle, Alex D. Crawford, Jillian J. Morrison, Marian Frazier, Jennifer A. Faust
Summary: In this study, liquid chromatography high-resolution mass spectrometry was used to screen for suspect pesticides in wet deposition for the first time. The presence of 23 pesticides, including three species never before quantified in wet deposition, was confirmed. The study reveals the transport and fate of pesticides in the atmosphere, providing important evidence for accurate modeling of the atmospheric transport and fate of these compounds.
ATMOSPHERIC ENVIRONMENT
(2022)
Review
Chemistry, Analytical
B. Gonzalez-Gaya, N. Lopez-Herguedas, D. Bilbao, L. Mijangos, A. M. Iker, N. Etxebarria, M. Irazola, A. Prieto, M. Olivares, O. Zuloaga
Summary: Suspect and non-target screening (SNTS) techniques are emerging as valuable tools for analyzing environmental occurrence of exogenous chemicals. These techniques have diverse applications but are challenged by harmonization and knowledge gaps in their implementation.
ANALYTICAL METHODS
(2021)
Article
Biochemical Research Methods
Jonathan S. Casey, Stephen R. Jackson, Jeff Ryan, Seth R. Newton
Summary: This study developed a workflow for the analysis, identification, and categorization of PFAS using GC-HRMS with NTA and suspect screening techniques. A custom database of 141 diverse PFAS was constructed, containing mass spectra from different ionization modes. The study also developed a workflow for suspect screening of PFAS and partially fluorinated products, achieving a 100% true positive rate in a challenge sample and identifying several fluorinated species in incineration samples.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Engineering, Environmental
Shiru Wang, Ruta Basijokaite, Bethany L. Murphy, Christa A. Kelleher, Teng Zeng
Summary: This work characterized complex mixtures of OMPs in streams draining mixed-use watersheds using passive sampling and liquid chromatography-high-resolution mass spectrometry. Suspect screening and nontarget screening identified a large number of OMPs, and POCIS was used to assist in OMP load estimation and screening-level risk assessments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Biochemical Research Methods
Yujie Zhang, Tiantian Chen, Dawei Chen, Wenying Liang, Xin Lu, Chunxia Zhao, Guowang Xu
Summary: A comprehensive suspect and nontarget screening strategy for mycotoxins was developed using UHPLC-HRMS, allowing for the rapid identification of parent and modified mycotoxins in contaminated food samples.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Physical
Abdulelah AlQahtani, Yousef Al-Dlaigan, Ahmed Almahdy
Summary: This study compared the microtensile bond strength (mu TBS) of bioactive resin-based sealants (Bio-RBS) and resin-based sealants (RBS) in primary and permanent teeth, with and without the use of a bonding agent. The results showed that Bio-RBS exhibited superior mu TBS than RBS when applied to permanent teeth.
Article
Environmental Sciences
Nikoline J. Nielsen, Peter Christensen, Kristoffer G. Poulsen, Jan H. Christensen
Summary: Household waste is a significant source of energy, nutrients, and recyclable material. In the context of circular economy, it is important to assess the risk profile towards human and the environment in order to exploit the benefits and avoid hazards. This study investigated the presence of micropollutants in household waste through various analytical techniques and observed changes in chemical composition during anaerobic digestion. The study identified several target micropollutants and tentatively identified compounds through suspect screening. The results also showed that most compounds detected decreased or remained unaffected by anaerobic digestion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Wonjin Sim, Sol Choi, Heon-Jun Lee, Kyungtae Kim, Kyunghwa Park, Jeong-Eun Oh
Summary: This study proposed sample preparation methods for suspect and non-target screening (SNTS) using gas chromatography coupled to high-resolution mass spectrometry in the aquatic environment. The pretreatment methods were evaluated based on detection rates, recoveries, and screening detection limits (SDLs) for various substances. The results showed that solid-phase extraction and ultrasonic extraction with HLB cartridge clean-up were effective methods for detecting compounds in water, sediment, and biota samples. Additional pretreatment using deactivated silica gel clean-up was necessary for the detection of persistent organic pollutants (POPs). The suggested methods were satisfactory for the SNTS of most pollutants originated from anthropogenic sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Lei Wang, Qinru Xiao, Mingdeng Yuan, Shaoyou Lu
Summary: In this study, extracts of food contact material (FCM) samples from South China were analyzed, revealing the presence of various organophosphate esters (OPEs) and organophosphite antioxidants (OPAs), some of which were identified for the first time. The study also investigated the migration risk of these compounds from FCMs to food, highlighting the importance of understanding their diversity and occurrences.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Ian Oesterle, Manuel Pristner, Sabrina Berger, Mingxun Wang, Vinicius Verri Hernandes, Annette Rompel, Benedikt Warth
Summary: Polyphenols, abundant in plants and fungi, have beneficial bioactive properties. High-resolution mass spectrometry (HRMS) is favored for analyzing their complexity. This study evaluated the advantages of HRMS, using untargeted techniques and online resources, for annotating polyphenols and other molecules. Despite the sensitivity loss compared to low-resolution mass spectrometry (LRMS), HRMS is capable of comprehensively investigating human polyphenol exposure, linking it to human health effects and toxicological mixture effects with other xenobiotics.
ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Hiba Mohammed Taha, Reza Aalizadeh, Nikiforos Alygizakis, Jean-Philippe Antignac, Hans Peter H. Arp, Richard Bade, Nancy Baker, Lidia Belova, Lubertus Bijlsma, Evan E. Bolton, Werner Brack, Alberto Celma, Wen-Ling Chen, Tiejun Cheng, Parviel Chirsir, L'ubos Cirka, Lisa A. D'Agostino, Yannick Djoumbou Feunang, Valeria Dulio, Stellan Fischer, Pablo Gago-Ferrero, Aikaterini Galani, Birgit Geueke, Natalia Glowacka, Juliane Gluge, Ksenia Groh, Sylvia Grosse, Peter Haglund, Pertti J. Hakkinen, Sarah E. Hale, Felix Hernandez, Elisabeth M-L Janssen, Tim Jonkers, Karin Kiefer, Michal Kirchner, Jan Koschorreck, Martin Krauss, Jessy Krier, Marja H. Lamoree, Marion Letzel, Thomas Letzel, Qingliang Li, James Little, Yanna Liu, David M. Lunderberg, Jonathan W. Martin, Andrew D. McEachran, John A. McLean, Christiane Meier, Jeroen Meijer, Frank Menger, Carla Merino, Jane Muncke, Matthias Muschket, Michael Neumann, Vanessa Neveu, Kelsey Ng, Herbert Oberacher, Jake O'Brien, Peter Oswald, Martina Oswaldova, Jaqueline A. Picache, Cristina Postigo, Noelia Ramirez, Thorsten Reemtsma, Justin Renaud, Pawel Rostkowski, Heinz Ruedel, Reza M. Salek, Saer Samanipour, Martin Scheringer, Ivo Schliebner, Wolfgang Schulz, Tobias Schulze, Manfred Sengl, Benjamin A. Shoemaker, Kerry Sims, Heinz Singer, Randolph R. Singh, Mark Sumarah, Paul A. Thiessen, Kevin Thomas, Sonia Torres, Xenia Trier, Annemarie P. van Wezel, Roel C. H. Vermeulen, Jelle J. Vlaanderen, Peter C. von der Ohe, Zhanyun Wang, Antony J. Williams, Egon L. Willighagen, David S. Wishart, Jian Zhang, Nikolaos S. Thomaidis, Juliane Hollender, Jaroslav Slobodnik, Emma L. Schymanski
Summary: The NORMAN Suspect List Exchange (NORMAN-SLE) is a global chemical information resource that hosts valuable suspect screening lists for the environmental community. It contains 99 separate lists from over 70 contributors, totaling over 100,000 unique substances. The NORMAN-SLE allows integration with other major chemical resources, fostering the exchange of information and supporting the paradigm shift to a one substance, one assessment approach.
ENVIRONMENTAL SCIENCES EUROPE
(2022)
Article
Chemistry, Analytical
Reza Aalizadeh, Nikiforos A. Alygizakis, Emma L. Schymanski, Martin Krauss, Tobias Schulze, Maria Ibanez, Andrew D. McEachran, Alex Chao, Antony J. Williams, Pablo Gago-Ferrero, Adrian Covaci, Christoph Moschet, Thomas M. Young, Juliane Hollender, Jaroslav Slobodnik, Nikolaos S. Thomaidis
Summary: This study proposed a unified retention time index (RTI) approach for liquid chromatography, aiming to achieve comparable retention times among different laboratories. By calibrating the elution pattern with two sets of calibration compounds, the RTI range was set between 1 and 1000, which was considered the most appropriate RTI system after rigorous evaluation.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Huijun Su, Kefan Ren, Rongrong Li, Jianhua Li, Zhanqi Gao, Guanjiu Hu, Pingqing Fu, Guanyong Su
Summary: This study reviewed existing literature on liquid crystal monomers (LCMs) and established a database containing 1173 LCMs. The physicochemical properties of these LCMs were calculated, and a suspect screening strategy tailored for LCMs was successfully developed. This strategy has the potential to be applied to other environmental matrices.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Stephanie Chaousis, Frederic D. L. Leusch, Colin J. Limpus, Amanda Nouwens, Liesbeth J. Weijs, Antonia Weltmeyer, Adrian Covaci, Jason P. van de Merwe
Summary: All seven species of sea turtle are facing increasing pressures from human activities that are impacting their health. Changes in blood proteins can indicate adverse health outcomes. This study examines the protein abundance in sea turtle plasma, compares protein expression between different populations, and investigates markers of contaminant exposure.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Imane Berni, Aziza Menouni, Matteo Creta, Ibrahim El Ghazi, Radu-Corneliu Duca, Lode Godderis, Samir El Jaafari
Summary: This study aimed to evaluate the levels of glyphosate and its metabolite AMPA in Moroccan children, identify predictors, and conduct a risk assessment. The study found that glyphosate and AMPA were detected in the urine of 73% and 75% of children, respectively, with higher concentrations in younger children and those living near pesticide spraying fields. Factors such as drinking water source and household income were also associated with AMPA concentration. The health risk assessment showed low risk for the target population.
ENVIRONMENTAL RESEARCH
(2023)
Article
Public, Environmental & Occupational Health
Shoji F. Nakayama, Annie St-Amand, Tyler Pollock, Petra Apel, Yu Ait Bamai, Dana Boyd Barr, Jos Bessems, Antonia M. Calafat, Argelia Castano, Adrian Covaci, Radu Corneliu Duca, Sarah Faure, Karen S. Galea, Sean Hays, Nancy B. Hopf, Yuki Ito, Maryam Zare Jeddi, Marike Kolossa-Gehring, Eva Kumar, Judy S. LaKind, Marta Esteban Lopez, Henriqueta Louro, Kristin Macey, Konstantinos C. Makris, Lisa Melnyk, Aline Murawski, Josh Naiman, Julianne Nassif, Nolwenn Noisel, Devika Poddalgoda, Lesliam Quiros-Alcala, Ata Rafiee, Loic Rambaud, Maria Joao Silva, Jun Ueyama, Marc-Andre Verner, Maisarah Nasution Waras, Kate Werry
Summary: Human biomonitoring (HBM) data can be used to compare population exposures, but finding the relevant health-based biomonitoring guidance values can be time-consuming. To address this issue, an online repository called the Human Biomonitoring Health-Based Guidance Value (HB2GV) Dashboard has been created. This database provides a centralized location for researchers and decision makers to access and interpret HBM data.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2023)
Article
Environmental Sciences
Louise J. Delhaye, Marc Elskens, Constanza Ricaurte-Villota, Luis Cerpa, Marc Kochzius
Summary: This study investigates the trace element concentrations in surface sediment samples collected in the Antarctic Peninsula. The results show lower concentrations of Fe, Mn, Co, V, Zn in Hope Bay, while moderate to significant enrichment in Cu, As, Cd in the Bransfield Strait and around King George Island. Twelve stations present a moderate ecological risk. The results suggest a natural origin for the element enrichment, possibly related to volcanism and the geology of the area.
MARINE POLLUTION BULLETIN
(2023)
Article
Public, Environmental & Occupational Health
Ella Parsons, Sheryl L. Rifas-Shiman, Anne K. Bozack, Andrea A. Baccarelli, Dawn L. DeMeo, Marie-France Hivert, Lode Godderis, Radu-Corneliu Duca, Emily Oken, Andres Cardenas
Summary: The prenatal environment may program health and disease susceptibility via epigenetic mechanisms. This study found associations between maternal trimester-specific intake of micronutrients and global DNA methylation and 5-hydroxymethylation in cord blood, with some associations persisting into early childhood.
JOURNAL OF DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE
(2023)
Article
Biochemical Research Methods
Siebe Lievens, Evelynn Vervoort, Giulia Poma, Adrian Covaci, Mik Van Der Borght
Summary: Concerns about microplastics in the environment have grown, leading scientists to conduct thorough studies. A cryogenic grinding and wet-sieving method was developed to efficiently produce and fractionate microplastics. With this method, polyvinyl chloride (PVC) microplastics could be produced with specific particle sizes and easily separated into different size ranges. The method has the potential to be applied to other types of plastics as well.
METHODS AND PROTOCOLS
(2023)
Article
Chemistry, Analytical
Chien-chia Chen, Karabi Mondal, Philippe Vervliet, Adrian Covaci, Evan P. O'Brien, Karl J. Rockne, James L. Drummond, Luke Hanley
Summary: Compound identification by database searching is commonly used in mass spectrometric data analysis. Machine learning was applied to statistically evaluate the identification results generated by software. Logistic regression was used to assign identification probabilities for each compound, providing more confidence in identification beyond database matching.
ANALYTICAL CHEMISTRY
(2023)
Article
Toxicology
Elias Iturrospe, Rani Robeyns, Katyeny Manuela da Silva, Maria van de Lavoir, Joost Boeckmans, Tamara Vanhaecke, Alexander L. N. van Nuijs, Adrian Covaci
Summary: Despite being common, alcoholic liver disease remains poorly understood, especially in its early stages. In this study, alcoholic steatohepatitis was simulated in vitro to investigate the metabolic alterations and identify affected pathways. The researchers discovered key findings, such as the influence of TNF-alpha on hepatic triglycerides and the detection of FAHFA-containing triglycerides in human hepatocytes, which may play an important role in the progression of alcoholic steatohepatitis. Additionally, ethoxylated phosphorylcholine was identified as a potential new biomarker of ethanol exposure.
ARCHIVES OF TOXICOLOGY
(2023)
Article
Environmental Sciences
Shanshan Yin, Thomas J. McGrath, Adam Cseresznye, Jasper Bombeke, Giulia Poma, Adrian Covaci
Summary: Chlorinated paraffins (CPs) are a major environmental concern and it is essential to have an effective tool for monitoring personal exposure to CPs. In this study, silicone wristbands (SWBs) were used as a personal passive sampler, and results showed that micro-environments were key contributors to dermal exposure to CPs.
ENVIRONMENTAL RESEARCH
(2023)
Article
Public, Environmental & Occupational Health
Tiina Santonen, Henriqueta Louro, Beatrice Bocca, Radia Bousoumah, Radu Corneliu Duca, Aleksandra Fucic, Karen S. Galea, Lode Godderis, Thomas Goen, Ivo Iavicoli, Beata Janasik, Kate Jones, Elizabeth Leese, Veruscka Leso, Sophie Ndaw, Katrien Poels, Simo P. Porras, Flavia Ruggieri, Maria J. Silva, An Van Nieuwenhuyse, Jelle Verdonck, Wojciech Wasowicz, Ana Tavares, Ovnair Sepai, Paul T. J. Scheepers, Susana Viegas
Summary: Within the HBM4EU initiative, a targeted study on occupational exposure to hexavalent chromium was conducted. The study supports regulatory actions and enforcement programs for chromium management and contributes to the updating of limit values for chromium. Additionally, it provides insights on risk management measures and highlights the need to pay attention to per- and polyfluoroalkyl substances exposure. A survey confirms the relevance and usefulness of the human biomonitoring approach in assessing and managing occupational exposure to hexavalent chromium.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2023)
Article
Chemistry, Analytical
Katyeny Manuela da Silva, Michele Woelk, Palina Nepachalovich, Elias Iturrospe, Adrian Covaci, Alexander L. N. van Nuijs, Maria Fedorova
Summary: Epilipids, a subset of the lipidome, play a crucial role in regulating redox lipid metabolism and influencing cell fate decisions. Ion mobility spectrometry (IMS) combined with liquid chromatography-high-resolution mass spectrometry (LC-HRMS) can improve the peak capacity and separation ability for the analysis of oxidized complex lipids. This study demonstrates the advantages and limitations of implementing IMS in LC-HRMS workflows and provides insights into the annotation of oxidized complex lipids.
ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Lidia Belova, Giulia Poma, Maarten Roggeman, Yunsun Jeong, Da-Hye Kim, Patrick Berghmans, Jan Peters, Amina Salamova, Alexander L. N. van Nuijs, Adrian Covaci
Summary: Quaternary ammonium compounds (QACs) in European indoor dust were identified, characterized, and semi-quantified using ion-mobility high-resolution mass spectrometry. Targeted QACs (21) and suspect QACs (17) were detected with high detection frequencies. The concentrations of individual QACs were estimated and daily intakes for adults and toddlers were calculated. This study provides important insights into the potential human exposure to QACs.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Thomas J. McGrath, Giulia Poma, Sebastien Hutinet, Yukiko Fujii, Robin E. Dodson, Boris Johnson-Restrepo, Dudsadee Muenhor, Gaud Dervilly, Ronan Cariou, Adrian Covaci
Summary: In this study, dust samples from Japan, Australia, Colombia, and Thailand were analyzed for different chain lengths of chlorinated paraffins. The results showed that chlorinated paraffins were detected in all samples, with the highest concentrations found in samples from Colombia and Thailand. Based on current toxicological data, it was determined that short-chain and medium-chain chlorinated paraffins in indoor dust do not pose a health risk through ingestion.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Elisabeth Hansen, Jiachen Sun, Bjorn Helander, Jan Ove Bustnes, Igor Eulaers, Veerle L. B. Jaspers, Adrian Covaci, Marcel Eens, Sophie Bourgeon
Summary: English Summary: Exposure to persistent organic pollutants (POPs), such as organochlorines (OCs) and polybrominated diphenyl ethers (PBDEs), can have adverse health effects on wildlife. White-tailed eagles in the Baltic ecosystem have suffered population declines due to severe exposure to DDT and PCB. In this study, feathers from breeding WTE pairs were analyzed to investigate the annual variations in feather corticosterone (fCORT), POPs, and dietary proxies. The results did not support fCORT as a relevant biomarker of contaminant-mediated effects in WTEs, but fCORT can be used as a non-destructive assessment of long-term stress physiology in wild raptors.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Paulien Cleys, Lucas Panneel, Jasper Bombeke, Catalina Dumitrascu, Govindan Malarvannan, Giulia Poma, Antonius Mulder, Philippe G. Jorens, Adrian Covaci
Summary: This study reports metabolites of phthalate and alternative plasticizers in neonatal hair samples as biomarkers for exposure to these plasticizers. Results showed that hair sampled from premature neonates after a NICU stay contained significantly higher metabolite concentrations of both phthalates and alternative plasticizers compared to healthy control neonates. Prolonged NICU exposure to respiratory support devices and gastric tubes was correlated with increased concentrations in hair samples.
ENVIRONMENTAL RESEARCH
(2023)
Correction
Biochemical Research Methods
Yong Wang, Suhua Yu, Rui Li, Jing Wan, Yuheng Wang, Zongli Huo, Chunyong Wu, Li Mi, Songqin Liu
JOURNAL OF CHROMATOGRAPHY A
(2024)
Review
Biochemical Research Methods
Israel D. Souza, Maria Eugenia C. Queiroz
Summary: Organic-silica hybrid monolithic materials have gained significant attention in separation science and sample preparation due to their unique properties. This review summarizes the characteristics, current status, and recent developments of these materials, as well as discusses synthesis methods, characterization techniques, and strategies for improving extraction efficiency in various applications.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Bhagwat Upreti, Bhanu Prasad Vempatapu, Jagdish Kumar, Pankaj K. Kanaujia
Summary: Lubricating oils are essential for the effective performance of internal combustion engines. This study presents a new HPLC method for determining additives in finished lubricating oils and polar substances in used engine oils.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zongqing Huang, Haoju Hua, Xiuzhen Du, Zipeng Zhen, Wei Zhao, Jun Feng, Ji-an Li
Summary: This study successfully isolated VHHs against the SUMO protein for the first time using biopanning of an immune camelid nanobody library. The VHHs were coupled to agarose resins to form affinity chromatography resins, allowing for one-step purification of various SUMO fusions.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Xueting Qiu, Xuben Hou, Yue Yang, Hao Fang, Fei Cui, Xinying Yang
Summary: In this study, a new method based on electrophoretically mediated microanalysis was developed for the investigation of PTPRO enzymatic activity. The method was successfully used to determine the kinetics of PTPRO and the inhibitory concentration of PTPRO inhibitors. The method exhibited improved accuracy and reduced consumption compared to traditional methods.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Feifei Luo, Mengmeng Hao, Lei Zhang, Yangguo Xie, Wei Hou, Hongya Wang, Zhongli Zhang
Summary: In this study, a comprehensive screening and structure elucidation of 23 nonvolatile organic compounds (NVOCs) in two antibody drugs was conducted. Seven previously unreported compounds were identified. A quantitative method with high sensitivity, accuracy, and precision was developed for evaluating the safety of NVOCs in drug products.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zuzana Vosahlova, Kveta Kalfkova, Martin Gilar, Jakub Szymarek, Maria Mazurkiewicz-Beldzinska, Sylwia Studzi
Summary: A hydrophilic interaction liquid chromatography method was developed for the separation and identification of oligonucleotide impurities and metabolites, and successfully applied to the analysis of serum samples from Spinraza-treated patients.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Aswanidevi Kongasseri, Thirumalai Madhesan, Sangeetha Krishna Kumar, Sushmitha Pedugu Sivaraman, Suchashrita Mitra, Pitchaiah Kancharlapalli Chinaraga, C. V. S. Brahmmananda Rao, Sivaraman Nagarajan, Prabhakaran Deivasigamani, Akhila Maheswari Mohan
Summary: This study focuses on the sequential separation of trivalent lanthanides using modified C-18 silica-packed supports and reversed-phase HPLC technique. By tuning the column modifiers and separation parameters, the researchers achieved systematic separation of Ln(3+). The results showed that the choice of column modifiers and fine-tuning of the modification procedure were crucial for achieving excellent separation.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Raquel Perez-Robles, Szabolcs Fekete, Robert Kormany, Natalia Navas, Davy Guillarme
Summary: There is a mismatch between the sample diluent and the mobile phase in HILIC analysis, leading to analyte breakthrough and peak distortion. Adding a weak solvent for pre-injection can effectively prevent these issues and improve sensitivity.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Oleg Pokrovskiy, Irina Rostovschikova, Konstantin Ustinovich, Ilya Voronov, Dmitry Kosyakov
Summary: A chromatography-like propagation of water through the material bed was observed during supercritical fluid extraction of aroma plants with high moisture content, which could be significant for modeling the kinetics of supercritical fluid extraction of non-volatile compounds.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Yasar Kemal Recepoglu, Ozguer Arar, Asli Yuksel
Summary: Biosorption using phosphorylated hazelnut shell waste (FHS) is a promising method for lithium removal and recovery. This study investigated the performance of a continuous-flow packed-bed column system using FHS for ultra-low level lithium removal. The results showed that the lihium biosorption capacity of the FHS column was unaffected by the bed height, but decreased with increasing flow rate.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Jian Sun, Zheheng Zheng, Zixiao Jia, Jiabin Wang, Xucong Lin
Summary: In this study, an ionic covalent organic framework (iCOF) surface grafting monolithic sorbent was prepared for in-tube solid-phase microextraction (SPME) of aristolochic acids (AAs) in various samples. The density of quaternary ammonium ions in the iCOF was modulated for enhanced adsorption of AAs. The iCOF surface grafting monolithic sorbent was confirmed by different means. Several operating conditions were optimized to develop the online in-tube SPME-HPLC method, which showed good linearity, low limits of detection, and high recoveries for AAs in serum samples. This study presents a feasible approach for the application of COF-based monolithic sorbents in sample preparation.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zeng Wen, Ruihan Peng, Die Gao, Jing Lin, Jia Zeng, Zhou Li, Famin Ke, Zhining Xia, Dandan Wang
Summary: A chitosan-alginate sponge with multiple cross-linking networks was developed for adsorption and enrichment of anionic dyes from food samples. The sponge showed better three-dimensional network structure, mechanical behavior, and stability compared to pure chitosan and alginate sponges. The adsorption performance and selectivity of the sponge were systematically studied, and it maintained high adsorption capacity and selectivity for anionic dyes. The sponge also showed satisfactory reusability and was successfully combined with high-performance liquid chromatography for the enrichment and detection of anionic dyes in candy and cocktail samples.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Hairong Zhang, Xiaojuan Jiang, Dandan Zhang, Yuexin Yang, Qiang Xie, Caisheng Wu
Summary: Analysis of in vivo exposure to traditional Chinese medicine using mass spectrometry is helpful for identifying effective ingredients and developing new drugs. This study focused on Forsythia suspensa (Lian Qiao) and used metabolomics technology to explore its in vivo exposure. By comparing the differences before and after administration, a complete set of nontargeted analysis strategies for TCM exposure was established. The study identified 393 Lian Qiao-related chemical components in mice after administration, including prototypes and metabolites. This study provides a reference for research on the active ingredients of Lian Qiao in vivo.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Oscar Castejon-Musulen, Ricardo Lopez, Ignacio Ontan, Vicente Ferreira
Summary: A quantitative analytical method was developed and validated in this study to determine the concentrations of 81 aroma-relevant wine volatiles. The method utilizes stir bar sorptive extraction and multidimensional gas chromatography with flame ionization detector or mass spectrometer. The method demonstrated good linearity, reproducibility, and recovery, and was successfully applied to analyze 20 wine samples.
JOURNAL OF CHROMATOGRAPHY A
(2024)