Torsten C. Schmidt
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View article: Exploring non-target screening variability in unsupervised multivariate time trend analysis of LC-HRMS data
Exploring non-target screening variability in unsupervised multivariate time trend analysis of LC-HRMS data Open
Non-target screening (NTS) using liquid chromatography-high-resolution mass spectrometry has become essential for uncovering unknown contaminants in complex matrices such as industrial wastewater. A key goal in these applications is detect…
View article: Investigation of a new material and sealing geometry for aluminum-based components in ultra-high vacuum applications
Investigation of a new material and sealing geometry for aluminum-based components in ultra-high vacuum applications Open
ConFlat ® sealing components are of great significance in ultra-high vacuum systems. The vacuum-tight connection is achieved by pressing the sealing surface of a knife-edge geometry into an inserted soft metal flat gasket. In this context,…
View article: Eco‐Friendly Mechanochemical Approach to Magnetic Graphene Oxide: A High‐Efficiency Sorbent for Environmental Pollutant Removal
Eco‐Friendly Mechanochemical Approach to Magnetic Graphene Oxide: A High‐Efficiency Sorbent for Environmental Pollutant Removal Open
Graphene oxide (GO) is a nanomaterial with excellent physico‐chemical properties widely used in a high variety of technological applications. However, conventional protocols for GO preparation rely on wet synthesis, involving extreme chemi…
View article: Cigarette filters as a major source of microfibers in aquatic environments
Cigarette filters as a major source of microfibers in aquatic environments Open
View article: Automated vortex-assisted-liquid-liquid microextraction with injector-based derivatization for GC-MS/MS analysis of 1,3-dichloropropan-2-ol and 3-chloropropane-1,2-diol in food contact paper products
Automated vortex-assisted-liquid-liquid microextraction with injector-based derivatization for GC-MS/MS analysis of 1,3-dichloropropan-2-ol and 3-chloropropane-1,2-diol in food contact paper products Open
The analysis of 1,3-dichloropropan-2-ol (1,3-DCP) and 3-chloropropane-1,2-diol (3-MCPD) in paper products and cardboard boxes used as food contact materials is of great importance due to the potential health risks associated with the intak…
View article: Quantification of Gaseous Products Evolved at Industrially Relevant Current Densities During CO<sub>2</sub> Electroreduction and Water Electrolysis Using Online Gas Chromatography
Quantification of Gaseous Products Evolved at Industrially Relevant Current Densities During CO<sub>2</sub> Electroreduction and Water Electrolysis Using Online Gas Chromatography Open
The quantification of gaseous chemicals such as CO and H 2 , obtained during the electrochemical reduction of CO 2 or water using online gas chromatography (GC), is extremely relevant for the evaluation of an electrolysis system's performa…
View article: Spatial and Temporal Patterns of <i>Gammarus</i> sp. in Lowland Streams Analyzed Through Amino Acid Isotope Analysis
Spatial and Temporal Patterns of <i>Gammarus</i> sp. in Lowland Streams Analyzed Through Amino Acid Isotope Analysis Open
Understanding the trophic ecology and nutrient dynamics of freshwater invertebrates is crucial for evaluating the function and resilience of ecosystems. Although bulk stable isotope analysis is widely used to investigate food web structure…
View article: Effects of the herbicide metazachlor on locomotor activity and biochemical responses of Ephemera danica larvae
Effects of the herbicide metazachlor on locomotor activity and biochemical responses of Ephemera danica larvae Open
Background The widespread use and frequent detection of the herbicide metazachlor (MTZ) in aquatic environments have raised concerns about its impacts on non-target organisms. Despite its regular presence in freshwater ecosystems, the ecot…
View article: Zwölf-Punkte-Kompass zur Überwindung der deutschen Wachstumsschwäche
Zwölf-Punkte-Kompass zur Überwindung der deutschen Wachstumsschwäche Open
The Joint Economic Forecast project group predicts slight growth in Germany‘s gross domestic product of 0.2 % for 2025. Expansive fiscal policy will stimulate the economy in the next two years. The institutes project growth rates of 1.3 % …
View article: Trophic dynamics and metabolic pathways in host parasite interactions revealed by nitrogen isotope analysis of amino acids in multiple tissues
Trophic dynamics and metabolic pathways in host parasite interactions revealed by nitrogen isotope analysis of amino acids in multiple tissues Open
View article: Computational mass spectrometry for exposomics in non‑target screening
Computational mass spectrometry for exposomics in non‑target screening Open
View article: Enhanced degradation of cyclic ketone and its diamine derivative using ozone/peroxymonosulfate (O₃/PMS) process
Enhanced degradation of cyclic ketone and its diamine derivative using ozone/peroxymonosulfate (O₃/PMS) process Open
View article: Ultrashort‐Pulsed Laser Diffusion Enhancement in Liquids for Cold Extraction of Coffee in an Analytically Validated Low‐Fluence Regime
Ultrashort‐Pulsed Laser Diffusion Enhancement in Liquids for Cold Extraction of Coffee in an Analytically Validated Low‐Fluence Regime Open
Coffee is one of the most popular beverages, characterized by a complex composition and individual flavor profiles, strongly affected by extraction methods. A continuous and scalable cold extraction method based on irradiation of coffee pa…
View article: Modular annular photocatalytic membrane reactor for the degradation of micropollutants: Design and application
Modular annular photocatalytic membrane reactor for the degradation of micropollutants: Design and application Open
This study presents the Modular Annular Photocatalytic Membrane Reactor (MAPMR), designed to address key challenges in conventional photocatalytic reactors, such as uniform light distribution, efficient photocatalyst recovery, and a precis…
View article: A review of occurrence and concentrations of cellulose acetate and other artificial cellulose microfibers in aquatic environmental matrices: an indicator of cigarette butts’ contamination?
A review of occurrence and concentrations of cellulose acetate and other artificial cellulose microfibers in aquatic environmental matrices: an indicator of cigarette butts’ contamination? Open
View article: Cigarette filters as a main microfibers source in aquatic environments: Phase I
Cigarette filters as a main microfibers source in aquatic environments: Phase I Open
Cigarette butts (CBs) are known as one of the most prevalent forms of environmental waste, needing global attention to mitigate their detrimental health and ecological impacts. Owing to their filter composition, discarded CBs can persisten…
View article: Ecotoxicological data of selected antiviral drugs acting against SARS-CoV-2: Aliivibrio fischeri bioluminescence inhibition, Daphnia magna immobilization, and comparison with in silico predictions
Ecotoxicological data of selected antiviral drugs acting against SARS-CoV-2: Aliivibrio fischeri bioluminescence inhibition, Daphnia magna immobilization, and comparison with in silico predictions Open
Micropollutants such as pharmaceuticals that are released into the environment after wastewater treatment may have a severe impact on organisms in the aquatic environment. Especially ecotoxicological effects of antiviral drugs have been in…
View article: Unraveling non-target screening variability for LC-HRMS data: a chemometric comparative analysis of river water samples impacted by treated wastewater
Unraveling non-target screening variability for LC-HRMS data: a chemometric comparative analysis of river water samples impacted by treated wastewater Open
View article: Integrative Analysis of Nontargeted LC-HRMS and High-Throughput Metabarcoding Data for Aquatic Environmental Studies Using Combined Multivariate Statistical Approaches
Integrative Analysis of Nontargeted LC-HRMS and High-Throughput Metabarcoding Data for Aquatic Environmental Studies Using Combined Multivariate Statistical Approaches Open
Significant progress in high-throughput analytical techniques has paved the way for novel approaches to integrating data sets from different compartments. This study leverages nontarget screening (NTS) via liquid chromatography-high-resolu…
View article: LC‐IRMS Persulfate Oxidation: Case Study on Neonicotinoid‐Related Structures
LC‐IRMS Persulfate Oxidation: Case Study on Neonicotinoid‐Related Structures Open
Rationale Liquid chromatography‐isotope ratio mass spectrometry (LC‐IRMS) is used to analyze stable carbon isotope ratios of polar nonvolatile compounds. However, challenges with the persulfate‐based oxidation interface have been reported,…
View article: Development of a tool to routinely monitor wastewater systems via non-target screening utilizing spatial fingerprinting and temporal trend analysis as prioritization techniques
Development of a tool to routinely monitor wastewater systems via non-target screening utilizing spatial fingerprinting and temporal trend analysis as prioritization techniques Open
Non-Target Screening (NTS) is a valuable technique for exploring the chemical composition of aquatic systems. Although target screening has already been established in the quality control of water samples, adopting NTS, especially in data …
View article: Geopolitischer Umbruch verschärft Krise – Strukturreformen noch dringlicher
Geopolitischer Umbruch verschärft Krise – Strukturreformen noch dringlicher Open
The German economy is in crisis. Economic policy uncertainty is high in Germany due to the change of government. At the same time, the USA’s protectionist trade policy is weighing on the economy. In addition, the security situation in Euro…
View article: Investigating the photolytic degradation of novel monomeric and polymeric brominated flame retardants: analytical characterization, acute ecotoxicological effects and influence of sample storage
Investigating the photolytic degradation of novel monomeric and polymeric brominated flame retardants: analytical characterization, acute ecotoxicological effects and influence of sample storage Open
Background The environmental degradation of novel brominated flame retardants (BFRs) is largely unknown. Here, the photolytic degradation of the two novel BFRs, PolymericFR and Tetrabromobisphenol A-bis (2,3-dibrom-2-methyl-propyl) ether (…
View article: Glyphosate is a transformation product of a widely used aminopolyphosphonate complexing agent
Glyphosate is a transformation product of a widely used aminopolyphosphonate complexing agent Open
View article: The macroeconomic impact of asymmetric uncertainty shocks
The macroeconomic impact of asymmetric uncertainty shocks Open
View article: Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ15N analysis by LC-IRMS
Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ15N analysis by LC-IRMS Open
View article: Impact of physicochemical parameters on nicotine metabolites and Bisphenol A in municipal wastewater: A pilot study in a German metropolitan area
Impact of physicochemical parameters on nicotine metabolites and Bisphenol A in municipal wastewater: A pilot study in a German metropolitan area Open
Wastewater-based epidemiology (WBE) is a promising approach for assessing population-level exposures to toxicants and lifestyle factors. Our pilot investigated the spatial variability of biomarkers indicating exposure to nicotine and endoc…
View article: Green quantification of amino(poly)phosphonates using ion chromatography coupled to integrated pulsed amperometric detection
Green quantification of amino(poly)phosphonates using ion chromatography coupled to integrated pulsed amperometric detection Open
View article: House Price Cycles in the Euro Area Countries: Similarities and Differences
House Price Cycles in the Euro Area Countries: Similarities and Differences Open
View article: Host–Parasite Trophic Interactions as Revealed by Stable Isotope Analyses: Determinants for Trophic and Isotopic Niches of Hosts and Their Associated Parasites
Host–Parasite Trophic Interactions as Revealed by Stable Isotope Analyses: Determinants for Trophic and Isotopic Niches of Hosts and Their Associated Parasites Open