Article
Agriculture, Multidisciplinary
Min Hu, Yujie Ben, Ming Hung Wong, Chunmiao Zheng
Summary: An optimized method for the analysis of antibiotic residues in different food groups was developed, achieving good detection limits and recovery rates. The method has been successfully applied to the identification and quantification of antibiotic residues in common food products.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Bahar Nakhjavan, Jason Bland, Maryam Khosravifard
Summary: An analytical method for simultaneous quantification of 65 pesticides in surface water by liquid chromatography coupled to tandem mass spectroscopy was developed and validated. Different factors influencing extraction efficiency were evaluated, various parameters were investigated, and appropriate techniques were selected. The recoveries of pesticides were satisfactory and the method was evaluated on a variety of surface water samples.
Article
Environmental Sciences
Sebastiano Gozzo, Samuel Moles, Katarzyna Kinska, Maria P. Ormad, Rosa Mosteo, Jairo Gomez, Francisco Laborda, Joanna Szpunar
Summary: A UPLC-MS/MS method was optimized for the analysis of antibiotics and their metabolites in surface and wastewaters. The method was applied to monitor the river basin of the POCTEFA territory, and 21 antibiotics and their metabolites were detected. Fluoroquinolones and sulfamethoxazole, as well as their metabolites, should be considered as target compounds in the monitoring of water resources in the POCTEFA territory.
Article
Engineering, Environmental
Man-Man Wang, Zi-Ling Li, Han Wu, Ke-Yan Chen, Fan Guo, Gui-Fu Zuo, Yu He, Xue-Bo Yin
Summary: A magnetic solid-phase extraction (MSPE) technique using Fe3O4-NH2 @g-C3N4 nano-composite as sorbent was developed for the separation of a mixture of six benzophenones (BPs) in environmental water samples. The technique demonstrated efficient and reliable detection of trace BPs in environmental water samples through fast magnetic separation and high adsorption capacity of the composite material, minimizing interference.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Environmental Sciences
Jinhua Gan, Huan Liu, Yahong Chen, Jie Peng, Ting Liu, Jianwu Chen, Li He
Summary: The study developed a method for the multi-residue analysis of six diacylhydrazine insecticides in water, sediment, and aquatic products using LC-MS/MS, showing excellent accuracy and precision. The method proved to be applicable, efficient, and sensitive for detecting insecticides in various environmental samples.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
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
Agriculture, Multidisciplinary
Feride Oyku Sefiloglu, Ulas Tezel, Isil Akmehmet Balcioglu
Summary: The contamination of agricultural soil and crops is a global issue. In this study, a QuEChERS extraction coupled with LC-MS/MS quantification method was used for the first time to measure 65 emerging contaminants in soil and rice. Various pesticides and industrial chemicals were detected in soil, with pesticide residues present in all soil samples and industrial pollutants found in paddy soil samples. However, the concentrations of these contaminants in rice were below their maximum residual limits.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Engineering, Environmental
Beatriz Boger, Monica Surek, Raquel de O. Vilhena, Mariana M. Fachi, Allan M. Junkert, Josiane M. M. F. Santos, Eric L. Domingos, Alexandre de F. Cobre, Danilo R. Momade, Roberto Pontarolo
Summary: The study found the presence of different classes of antibiotics in urban river waters, with the highest concentration of amoxicillin at 4.63 µg/L. It also detected antibiotic resistant bacteria, including Escherichia coli and Enterococcus spp., with some showing resistance to multiple antibiotics. The source of these antibiotics may be domestic effluents which could be contributing to the spread of bacterial resistance.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Edgar Toth, Adam Tolgyesi, Andrea Simon, Maria Balint, Xingmao Ma, Virender K. Sharma
Summary: In this paper, a new liquid chromatography tandem mass spectrometric (LC-MS/MS) method for screening and quantification of pesticides in water samples was developed and validated. The method utilized solid-phase extraction (SPE) for sample preparation and achieved highly sensitive detection through the combination of liquid chromatography and mass spectrometry. Validation results demonstrated that the method met the requirements for pesticide detection.
Article
Chemistry, Applied
Hao Zhou, Rong Liu, Qianqian Chen, Xiantong Zheng, Jingli Qiu, Tongyan Ding, Limin He
Summary: The method based on SMISPE combined with LC-MS/MS is developed for determining residues of VCM and NVCM in milk samples, showing good linear correlation and high recoveries. It efficiently eliminates interference from matrix compounds and reduces baseline noise, making it useful for residue monitoring.
Article
Chemistry, Applied
Inal Bakhytkyzy, Weronika Hewelt-Belka, Agata Kot-Wasik
Summary: This study demonstrates a new method for comprehensive flaxseed lipidome profiling using LC-Q-TOF-MS and dispersive micro-solid-phase extraction. The method allows for simultaneous monitoring of both polar and non-polar lipids, overcoming the challenge of lipid species abundance.
Article
Biochemistry & Molecular Biology
Marjeta Mencin, Maja Mikulic-Petkovsek, Robert Veberic, Petra Terpinc
Summary: A solid-phase extraction (SPE) technique was developed and optimised for isolation and concentration of extractable and bound phenolic acids from germinated spelt seeds, for analysis by liquid chromatography-mass spectrometry. The study found that this method has significant advantages over traditional liquid-liquid extraction in terms of higher extraction efficiencies and can be used for quantitative analysis of extractable and bound phenolic acids.
Review
Chemistry, Analytical
Jonas da Silva Sousa, Helio Oliveira do Nascimento, Hiago de Oliveira Gomes, Ronaldo Ferreira do Nascimento
Summary: This review summarizes literature on the analysis of pesticide classes in surface water and groundwater, focusing on the toxicity of multiclass pesticides and recent advances in sample preparation methods like SPE and SPME. Different pesticide regulations across countries, improvements in SPME fibers, and the preference for tandem MS detection systems are highlighted as key points discussed in the literature.
MICROCHEMICAL JOURNAL
(2021)
Article
Environmental Sciences
Pavel Ondruch, Michael P. Schluesener, Georg Dierkes, Kevin Jewell, Torben Kirchgeorg, Simone Hasenbein, Thomas A. Ternes, Arne Wick
Summary: This study investigated the presence of micropollutants in the German Bight and discovered a high concentration of these pollutants, some of which exceeded the potential risk threshold for marine life, indicating a potential harm.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Jianmin Zou, Bo Yao, Shuwen Yan, Weihua Song
Summary: A novel mixed-mode online solid-phase extraction (SPE) method was developed in this study for the recovery of trace organic contaminants (TrOCs) from environmental water samples. The method was further coupled with liquid chromatography tandem mass spectrometry (LC-MS/MS) to establish a fully automated analytic method. The performance of the mixed-mode SPE cartridge was evaluated and the method was successfully applied for the screening and quantification of TrOCs in various water matrices.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Kinran Lau, Felix Niemann, Kaltum Abdiaziz, Markus Heidelmann, Yuke Yang, Yujin Tong, Michael Fechtelkord, Torsten C. Schmidt, Alexander Schnegg, R. Kramer Campen, Baoxiang Peng, Martin Muhler, Sven Reichenberger, Stephan Barcikowski
Summary: Both oxygen vacancies and surface hydroxyls have significant impacts on catalysis, but their relationship is often overlooked. In this study, TiO2 (rutile and P25) samples with increasing oxygen deficiency and Ti3+ concentration are prepared using pulsed laser defect engineering in liquid (PUDEL), and the acidic and basic surface hydroxyls are selectively quantified by fluoride substitution. The results show that near-surface Ti3+ is closely related to surface bridging OH, and the former may increase the electron density of the bridging oxygen to form more of the latter. The method of fluoride substitution is expected to provide a better characterization of surface hydroxyls and their correlation with defects in metal oxides.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Farshid Soleimani, Sina Dobaradaran, Amir Vazirizadeh, Gholamhossein Mohebbi, Bahman Ramavandi, Gabriel E. De-la-Torre, Iraj Nabipour, Torsten C. Schmidt, Thomas E. Novotny, Ammar Maryamabadi, Zahra Kordrostami
Summary: This study evaluated the toxic effects of cigarette butt leachates on juvenile fish and found that even low concentrations of leachates can cause lethality and pose a threat to fish population density.
Article
Engineering, Environmental
Xenia A. M. Mutke, Kittitouch Tavichaiyuth, Felix Drees, Holger Lutze, Torsten C. Schmidt
Summary: Reverse osmosis (RO) is an advanced technology for producing potable water from various water sources. Adding antiscalants can increase the yield of product water from RO systems. This study investigates the oxidation reactions of antiscalants with ozone and radicals, providing insights into their degradation and the impact of different water matrices.
Article
Multidisciplinary Sciences
Tobias Hesse, Milen Nachev, Shaista Khaliq, Maik A. Jochmann, Frederik Franke, Joern P. Scharsack, Joachim Kurtz, Bernd Sures, Torsten C. Schmidt
Summary: Stable isotope analysis is a powerful tool for studying nutrient origin and conversion in host-parasite systems. In a controlled infection experiment, the carbon isotope composition of amino acids and glucose in the cestode Schistocephalus solidus and in its second intermediate host was measured over a period of 90 days. The results provide insights into the nutrient assimilation and metabolism of the parasite.
SCIENTIFIC REPORTS
(2023)
Article
Biochemical Research Methods
Nerea Lorenzo-Parodi, Erich Leitner, Torsten C. Schmidt
Summary: This study compares three gas chromatographic methods for analyzing ten iodinated derivatives of aromatic amines, and finds that all methods and most analytes have good detection limits and precision. Urine samples from smokers and non-smokers were successfully analyzed, and differences in concentration were observed.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Nerea Lorenzo-Parodi, Wiebke Kaziur-Cegla, Astrid Gjelstad, Torsten C. Schmidt
Summary: Aromatic amines, such as those found in tobacco smoke, can enter the human body and be excreted in urine. Hollow fiber-liquid-phase microextraction (HF-LPME) and parallel artificial liquid membrane extraction (PALME) were optimized as alternatives to traditional liquid-liquid extraction (LLE) for measuring these compounds. PALME showed significantly higher recovery rates compared to HF-LPME and was further validated for nine different aromatic amines. The results demonstrate that PALME is a greener, more efficient, and automated alternative to LLE.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Farshid Soleimani, Sina Dobaradaran, Gholamhossein Mohebbi, Amir Vazirizadeh, Gabriel E. De-la-Torre, Reza Saeedi, Iraj Nabipour, Thomas E. Novotny, Torsten C. Schmidt
Summary: Cigarette butts (CBs) are a common and toxic form of marine debris, but the effects on aquatic organisms are not well understood. This study investigated the toxic effects of CBs leachates on fish's hematologic markers. The results showed that CBs leachates increased some hematologic markers and decreased hemoglobin levels in Periophthalmus waltoni.
Article
Chemistry, Physical
Theo Fromme, Lucie K. Tintrop, Sven Reichenberger, Torsten C. Schmidt, Stephan Barcikowski
Summary: Laser ablation in liquids is a scalable method for preparing nanoparticles and suppressing oxidation. The related chemical processes resulting from laser-induced decomposition reactions of organic solvents remain uncertain. This study investigates the solvent-dependent influence on gas formation rates, nanoparticle productivity, and gas composition during nanosecond laser ablation of gold.
Article
Chemistry, Medicinal
Lars M. H. Reinders, Martin D. Klassen, Martin Jaeger, Torsten C. Schmidt, Thorsten Teutenberg, Jochen Tuerk
Summary: Deliberate underdosing of active pharmaceutical ingredients in personalized drug preparations has been a concern in the past. To prevent fraud and ensure quality, a HPLC-DAD-HRMS method was established to identify and quantify bevacizumab, rituximab, and trastuzumab. Analysis of ten samples from seven pharmacies met the quality criteria and were deemed satisfactory.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2023)
Article
Chemistry, Analytical
Kjell Kochale, Jana Thissen, Ricardo Cunha, Stefan Lamotte, Thorsten Teutenberg, Torsten C. Schmidt
Summary: The concentration of polycyclic aromatic hydrocarbons in plastic products is regulated by the European Union. However, this regulation only applies to the end products and not intermediate substances. Therefore, a generic method was developed to analyze the polycyclic aromatic hydrocarbons listed by the Environmental Protection Agency and the European Union.
JOURNAL OF SEPARATION SCIENCE
(2023)
Article
Engineering, Environmental
Anam Asghar, David Kniesel, Mohaned Hammad, Ahmed K. Al-kamal, Doris Segets, Hartmut Wiggers, Torsten C. Schmidt
Summary: In this study, acid-treated graphene catalyst (Gr-COOH) was synthesized and its performance in different combinations of ozone and ozone activated peroxymonosulfate was evaluated. The results showed that heterocatalytic ozone-based activation of peroxymonosulfate performed efficiently at neutral and alkaline conditions. The synergistic effects of the oxidative processes were also tested, showing that the O3 + PMS + Gr-COOH process achieved the best performance in removing atrazine and nitrobenzene.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Hanna Laura Wiegand, Mischa Jutte, Katharina Klein, Annika Kranefuss, Cheolyong Kim, Holger Volker Lutze, Torsten Claus Schmidt
Summary: The efficiency of Fenton-based degradation processes is influenced by various factors, including the reactive species involved and the reaction conditions. This study investigates the degradation rates of two model compounds under different reaction conditions and reveals that the reduction of Fe(III) to Fe(II) is hindered at very acidic pH, leading to a dramatic decrease in the efficiency of the Fenton reaction. Additionally, the study demonstrates that pollutant degradation can occur at neutral pH in the presence of Suwannee River NOM, suggesting the potential application of Fenton reaction for pollutant treatment under neutral conditions.
Article
Environmental Sciences
Sina Dobaradaran, Ursula Telgheder, Gabriel E. De-la-Torre, Sarah P. Rockel, Xenia A. M. Mutke, Torsten C. Schmidt
Summary: This study investigated the leaching of nicotine from different parts of cigarette butts and its ecological risks. The results showed that the leaching levels of nicotine varied among different types and parts of cigarette butts, with the highest levels found in the remaining tobacco and ash. The leachate of nicotine was found to pose high risks to fish, algae, and Daphnia magna. The estimated amount of nicotine released into water environments from littered cigarette butts worldwide could range from 380 to 7065 tons.
ENVIRONMENTAL POLLUTION
(2024)
Article
Chemistry, Physical
Robert G. H. Marks, Sarah P. Rockel, Klaus Kerpen, Holger Somnitz, Philipp R. Martin, Maik A. Jochmann, Torsten C. Schmidt
Summary: This study investigated the pH-dependent photolysis of phosphonates in aqueous solutions and analyzed the transformation products. The results showed that the photolysis rate of phosphonates was influenced by pH and light conditions. Furthermore, the carbon kinetic isotope effects varied for different types of phosphonates.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Multidisciplinary Sciences
Mohammad Reza Masjedi, Zahra Torkshavand, Hossein Arfaeinia, Sina Dobaradaran, Farshid Soleimani, Akram Farhadi, Roshana Rashidi, Thomas E. Novotny, Sara Dadipoor, Torsten C. Schmidt
Summary: This study investigated the levels of hazardous contaminants in waterpipe tobacco wastes (WTWs) and their release into the water environment. The results showed that flavored tobacco samples had significantly higher levels of hazardous contaminants compared to local tobacco samples. Additionally, higher levels of contaminants were detected in seawater after simulating biodegradation processes.