Thomas Krämer (Thomas Kraemer)

Publication Activity (10 Years)

Years Active: 2018-2024
Publications (10 Years): 30

Top Topics

Liquid Chromatography

Mass Spectrometry

Machine Learning

Top Venues

Drug testing and analysis

Analytical chemistry

Metabolomics : Official journal of the Metabolomic Society

This page only lists publications with an associated author ORCID identifier.

Publications

Milena M Madry, Teresa Denifle, Tina M Binz, Christian Bogdal, Thomas Krämer, Markus R Baumgartner
Comprehensive Evaluation of Cocaine and its Hydroxy Metabolites in Seized Cocaine and a Large Cohort of Hair Samples. Journal of analytical toxicology (2024)
Andrea Eva Steuer, Maja Keller, Thomas Krämer, Sandra N Poetzsch
Multianalyte Approach-Including Automated Preparation of Calibrators-for Validated Quantification of 82 Drugs in Whole Blood by Liquid Chromatography-Tandem Mass Spectrometry. Drug testing and analysis (2024)
Michael Scholz, Andrea Eva Steuer, Akos Dobay, Hans-Peter Landolt, Thomas Krämer
Assessing the influence of sleep and sampling time on metabolites in oral fluid: implications for metabolomics studies. Metabolomics : Official journal of the Metabolomic Society 20 (5) (2024)
Michael Scholz, Andrea Eva Steuer, Akos Dobay, Hans-Peter Landolt, Thomas Krämer
Assessing the influence of sleep and sampling time on metabolites in oral fluid: implications for metabolomics studies. Metabolomics : Official journal of the Metabolomic Society 20 (5) (2024)
Michael Scholz, Andrea Eva Steuer, Akos Dobay, Hans-Peter Landolt, Thomas Krämer
Assessing the influence of sleep and sampling time on metabolites in oral fluid: implications for metabolomics studies. Metabolomics : Official journal of the Metabolomic Society 20 (5) (2024)
Max Polke, Marta Concheiro-Guisan, Gail Cooper, Christian Bogdal, Markus R Baumgartner, Thomas Krämer, Tina Maria Binz
Development and validation of a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method including 25 novel synthetic opioids in hair and subsequent analysis of a Swiss opioid consumer cohort. Drug testing and analysis (2024)
Michael Scholz, Stefan Lakaemper, Kristina Keller, Akos Dobay, Andrea Eva Steuer, Hans-Peter Landolt, Thomas Krämer
Metabolomics-based Sleepiness Markers for Risk Prevention and Traffic Safety (ME-SMART): a monocentric, controlled, randomized, crossover trial. Trials 24 (1) (2023)
Tom D Schneider, Thomas Krämer, Andrea Eva Steuer
Untargeted Metabolomics Profiling for Determination of the Time since Deposition of Biofluids in a Forensic Context: A Proof-of-Concept for Urine, Saliva, and Semen in Addition to Blood. Analytical chemistry (2023)
Lana Brockbals, Andreas Thomas, Tom Dario Schneider, Thomas Krämer, Andrea Eva Steuer, Mario Thevis
Do dried blood spots have the potential to support result management processes in routine sports drug testing?-Part 3: LC-MS/MS-based peptide analysis for dried blood spot sampling time point estimation. Drug testing and analysis (2023)
Lana Brockbals, Andreas Thomas, Tom Dario Schneider, Thomas Krämer, Andrea Eva Steuer, Mario Thevis
Do dried blood spots have the potential to support result management processes in routine sports drug testing?-Part 3: LC-MS/MS-based peptide analysis for dried blood spot sampling time point estimation. Drug testing and analysis (2023)
Michael Scholz, Stefan Lakaemper, Kristina Keller, Akos Dobay, Andrea Eva Steuer, Hans-Peter Landolt, Thomas Krämer
Metabolomics-based Sleepiness Markers for Risk Prevention and Traffic Safety (ME-SMART): a monocentric, controlled, randomized, crossover trial. Trials 24 (1) (2023)
Tom Dario Schneider, Thomas Krämer, Andrea Eva Steuer
Determination of the Time since Deposition of Blood-traces in a Forensic Context: Application of Untargeted LC-HR-MS/MS Metabolomics Profiling. Drug testing and analysis (2023)
Clementine Scholz, Markus R Baumgartner, Thomas Krämer, Tina Maria Binz
Single sample preparation for the simultaneous extraction of drugs, pharmaceuticals, cannabinoids and endogenous steroids in hair. Analytical methods : advancing methods and applications 14 (44) (2022)
Andrea Eva Steuer, Linda Sutter, Christian Steuer, Thomas Krämer
New gamma-hydroxybutyric acid (GHB) biomarkers: Development and validation of a liquid chromatography-tandem mass spectrometry method for the determination of GHB amino acid, carnitine, and fatty acid conjugates in urine. Drug testing and analysis (2022)
Gabriel L Streun, Andrea Eva Steuer, Sandra N Poetzsch, Lars C Ebert, Akos Dobay, Thomas Krämer
Towards a New Qualitative Screening Assay for Synthetic Cannabinoids Using Metabolomics and Machine Learning. Clinical chemistry 68 (6) (2022)
Tom D Schneider, Bernd Roschitzki, Jonas Grossmann, Thomas Krämer, Andrea Eva Steuer
Determination of the Time since Deposition of Blood Traces Utilizing a Liquid Chromatography-Mass Spectrometry-Based Proteomics Approach. Analytical chemistry 94 (30) (2022)
Andrea Eva Steuer, Linda Sutter, Christian Steuer, Thomas Krämer
New gamma-hydroxybutyric acid (GHB) biomarkers: Development and validation of a liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the determination of GHB amino acid, carnitine and fatty acid conjugates in urine. Drug testing and analysis (2022)
Andrea Eva Steuer, Justine Raeber, Fabio Simbuerger, Dario A Dornbierer, Oliver G Bosch, Boris B Quednow, Erich Seifritz, Thomas Krämer
Towards Extending the Detection Window of Gamma-Hydroxybutyric Acid-An Untargeted Metabolomics Study in Serum and Urine Following Controlled Administration in Healthy Men. Metabolites 11 (3) (2021)
Milena M Madry, Sandra N Poetzsch, Andrea Eva Steuer, Thomas Krämer, Markus R Baumgartner
Significance of Metabolite Ratios in the Interpretation of Segmental Hair Testing Results-Differentiation of Single from Chronic Morphine Use in a Case Series. Metabolites 11 (8) (2021)
Lisa Eisenbeiss, Tina Maria Binz, Markus R Baumgartner, Thomas Krämer, Andrea Eva Steuer
Cheating on forensic hair testing? Detection of potential biomarkers for cosmetically altered hair samples using untargeted hair metabolomics. The Analyst 145 (20) (2021)
Gabriel L Streun, Andrea E Steuer, Lars C Ebert, Akos Dobay, Thomas Krämer
Interpretable machine learning model to detect chemically adulterated urine samples analyzed by high resolution mass spectrometry. Clinical chemistry and laboratory medicine 59 (8) (2021)
Gabriel L Streun, Marco P Elmiger, Akos Dobay, Lars Christian Ebert, Thomas Krämer
A machine learning approach for handling big data produced by high resolution mass spectrometry after data independent acquisition of small molecules - Proof of concept study using an artificial neural network for sample classification. Drug testing and analysis 12 (6) (2020)
Lisa Eisenbeiss, Tina M Binz, Markus R Baumgartner, Thomas Krämer, Andrea Eva Steuer
Towards Best Practice in Hair Metabolomic Studies: Systematic Investigation on the Impact of Hair Length and Color. Metabolites 10 (10) (2020)
Lana Brockbals, Sandra N Poetzsch, Thomas Krämer, Andrea Eva Steuer
Postmortem metabolomics: Correlating time-dependent concentration changes of xenobiotic and endogenous compounds. Drug testing and analysis 12 (8) (2020)
Robert Erne, Laetitia Bernard, Andrea Eva Steuer, Markus R Baumgartner, Thomas Krämer
Hair Analysis: Contamination versus Incorporation from the Circulatory System-Investigations on Single Hair Samples Using Time-of-Flight Secondary Ion Mass Spectrometry and Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry. Analytical chemistry 91 (6) (2019)
Lisa Eisenbeiss, Tina Maria Binz, Markus R Baumgartner, Andrea Eva Steuer, Thomas Krämer
A possible new oxidation marker for hair adulteration: Detection of PTeCA (1H-pyrrole-2,3,4,5-tetracarboxylic acid) in bleached hair. Drug testing and analysis 12 (2) (2019)
Sandra N Poetzsch, Veronica P Veloso, Michael Bovens, Christian Bissig, Thomas Krämer, Michael Poetzsch
Liquid chromatography-tandem mass spectrometry screening method using information-dependent acquisition of enhanced product ion mass spectra for synthetic cannabinoids including metabolites in urine. Drug testing and analysis 11 (9) (2019)
Martina I Boxler, Gabriel L Streun, Matthias E Liechti, Yasmin Schmid, Thomas Krämer, Andrea Eva Steuer
Human Metabolome Changes after a Single Dose of 3,4-Methylenedioxymethamphetamine (MDMA) with Special Focus on Steroid Metabolism and Inflammation Processes. Journal of proteome research 17 (8) (2018)
Lana Brockbals, Michael Habicht, Irka Hajdas, Francesco M Galassi, Frank J Rühli, Thomas Krämer
Untargeted metabolomics-like screening approach for chemical characterization and differentiation of canopic jar and mummy samples from Ancient Egypt using GC-high resolution MS. The Analyst 143 (18) (2018)
Marco P Elmiger, Michael Poetzsch, Andrea Eva Steuer, Thomas Krämer
Parameter Optimization for Feature and Hit Generation in a General Unknown Screening Method-Proof of Concept Study Using a Design of Experiment Approach for a High Resolution Mass Spectrometry Procedure after Data Independent Acquisition. Analytical chemistry 90 (5) (2018)