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1. Analysis and fate of surfactants in the aquatic environment
by Knepper, T. P. (Thomas P.) and Barceló, Damià and Voogt, Pim de
2003, 1st ed., Wilson & Wilson's comprehensive analytical chemistry, ISBN 0444509356, Volume 40, xxviii, 966
Surface active agents | Environmental aspects | Analysis
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2. Full Text The flame—not the ashes: achievements and heritage of a passionate analytical chemist
by Gros, Leo and Knepper, Thomas P
Analytical and Bioanalytical Chemistry, ISSN 1618-2642, 4/2019, Volume 411, Issue 10, pp. 1927 - 1933
On December 28, 2018, Carl Remigius Fresenius would have celebrated his 200th birthday. Called a father, nestor, or pioneer and forerunner of analytical... 
Biochemistry, general | History of analytical chemistry | Zeitschrift für Analytische Chemie | Food Science | Applications | Practical training | Laboratory Medicine | Carl Remigius Fresenius | Heritage | Chemistry | Analytical Chemistry | Monitoring/Environmental Analysis | Characterization and Evaluation of Materials | CHEMISTRY, ANALYTICAL | Zeitschrift fur Analytische Chemie | BIOCHEMICAL RESEARCH METHODS | Analytical chemistry | Organic chemistry | Mathematical analysis | Ashes
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3. Full Text Combined study of source, environmental monitoring and fate of branched alkylphenols: The chain length matters
by Janousek, Raphael M and Müller, Jutta and Knepper, Thomas P
Chemosphere, ISSN 0045-6535, 02/2020, Volume 241, p. 124950
Alkylphenols (APs) are chemicals of largely anthropogenic origin. Longer chain derivatives like 4-nonylphenol (4NP) or 4-tert.-octylphenol (4tOP) are mainly... 
Branched alkylphenols | Octylphenol | Butylphenol | Nonylphenol | Mineralization | Biotransformation
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4. Full Text Halomethanesulfonic Acids-A New Class of Polar Disinfection Byproducts: Standard Synthesis, Occurrence, and Indirect Assessment of Mitigation Options
by Zahn, D and Meusinger, R and Fromel, T and Knepper, TP
ENVIRONMENTAL SCIENCE & TECHNOLOGY, ISSN 0013-936X, 08/2019, Volume 53, Issue 15, pp. 8994 - 9002
Halomethanesulfonic acids (HMSAs) are recently discovered polar disinfection byproducts without commercially available reference materials. To allow for their... 
BLADDER-CANCER | CONTAMINANTS | ENVIRONMENTAL SCIENCES | ORGANIC-CHEMICALS | ENGINEERING, ENVIRONMENTAL | OUTCOMES | IDENTIFICATION | DRINKING-WATER | Water treatment | Drinking water | Nuclear magnetic resonance--NMR | Congeners | Ozonation | Magnetic resonance spectroscopy | Multilayers | Precursors | Water analysis | Activated carbon | Solid phases | Spectroscopy | Reference materials | Byproducts | Disinfection | Mass spectroscopy | Liquid chromatography | Standards | Mitigation | Water sampling | Acids | Contaminants | Surface water | Reverse osmosis | Scientific imaging | Water pollution | Mass spectrometry
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5. Characterization of 3-Aminopropyl Oligosilsesquioxane
by Ian Ken D Dimzon and Tobias Frömel and Thomas P Knepper
Analytical Chemistry, ISSN 0003-2700, 05/2016, Volume 88, Issue 9, p. 4894
  The synthesis routes in the production of polysilsesquioxanes have largely relied upon in situ formations. This perspective often leads to polymers in which... 
Fractionation | Calibration | Polymers | Mass spectrometry | Molecular weight | Chromatography
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6. Full Text Previously unidentified sources of perfluoroalkyl and polyfluoroalkyl substances from building materials and industrial fabrics
by Janousek, Raphael M and Lebertz, Stephan and Knepper, Thomas P
Environmental science. Processes & impacts, ISSN 2050-7887, 06/2019, Volume 21, Issue 11, pp. 1936 - 1945
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are applied during the production of various consumer and industrial goods. As a consequence of their use... 
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7. Full Text Multi-layer solid-phase extraction and evaporation—enrichment methods for polar organic chemicals from aqueous matrices
by Köke, Niklas and Zahn, Daniel and Knepper, Thomas P and Frömel, Tobias
Analytical and Bioanalytical Chemistry, ISSN 1618-2642, 3/2018, Volume 410, Issue 9, pp. 2403 - 2411
Analysis of polar organic chemicals in the aquatic environment is exacerbated by the lack of suitable and widely applicable enrichment methods. In this work,... 
Biochemistry, general | Chemistry | Analytical Chemistry | Food Science | Monitoring/Environmental Analysis | Sample preparation | Characterization and Evaluation of Materials | Laboratory Medicine | Non-target screening | HILIC | Polar organic chemicals | Solid-phase extraction | CONTAMINANTS | CHEMISTRY, ANALYTICAL | POLLUTANTS | BIOCHEMICAL RESEARCH METHODS | TANDEM MASS-SPECTROMETRY | CHROMATOGRAPHY | WASTE-WATER | SURFACE | SAMPLES | ANTIDIABETIC DRUG METFORMIN | REVERSED-PHASE | MICROPOLLUTANTS | Extraction (Chemistry) | Chemical reactions | Observations | Methods | Analytical chemistry | Enrichment | Mass spectroscopy | Liquid chromatography | Evaporation | Retention time | Recovery | Chemicals | Lipophilic | Aquatic environment | Organic chemistry | Screening | Water sampling | Groundwater | Organic chemicals | Chemical properties | Mass spectrometry | Physicochemical properties
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8. Characterization of 3-Aminopropyl Oligosilsesquioxane
by Dimzon, Ian Ken D and Fromel, Tobias and Knepper, Thomas P
Analytical Chemistry (Washington), ISSN 0003-2700, 05/2016, Volume 88, Issue 9, pp. 4894 - 4894
The synthesis routes in the production of polysilsesquioxanes have largely relied upon in situ formations. This perspective often leads to polymers in which... 
Formulations | Macromolecules | Estimating | Homology | Polymers | Polysilsesquioxanes | High performance liquid chromatography | Standards
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9. Full Text Is the phase-out of long-chain PFASs measurable as fingerprint in a defined area? Comparison of global PFAS concentrations and a monitoring study performed in Hesse, Germany from 2014 to 2018
by Janousek, Raphael M and Mayer, Jens and Knepper, Thomas P
Trends in Analytical Chemistry, ISSN 0165-9936, 11/2019, Volume 120, p. 115393
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) represent a group of anthropogenic chemicals that were produced since the 1950s, however, voluntary and... 
PFBA | Phase-out | Replacement chemicals | PFAS | PFOA | Short-chain PFAS | Monitoring | PFOS
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10. Full Text Occurrence and spatial distribution of microplastics in river shore sediments of the rhine-main area in Germany
by Klein, Sascha and Worch, Eckhard and Knepper, Thomas P
Environmental Science and Technology, ISSN 0013-936X, 05/2015, Volume 49, Issue 10, pp. 6070 - 6076
Plastic debris is one of the most significant organic pollutants in the aquatic environment. Because of properties such as buoyancy and extreme durability,... 
ENVIRONMENTAL SCIENCES | PARTICLES | POLLUTION | CHANNEL | ENGINEERING, ENVIRONMENTAL | PACIFIC | ENVIRONMENT | PLASTIC MARINE DEBRIS | ACCUMULATION | IDENTIFICATION | PELLETS | ORGANIC CONTAMINANTS | Particle Size | Rivers - chemistry | Environmental Monitoring - methods | Geologic Sediments - chemistry | Plastics - analysis | Water Pollutants, Chemical - analysis | Germany
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11. Full Text Previously unidentified sources of perfluoroalkyl and polyfluoroalkyl substances from building materials and industrial fabricsElectronic supplementary information (ESI) available. See DOI: 10.1039/c9em00091g
by Janousek, Raphael M and Lebertz, Stephan and Knepper, Thomas P
ISSN 2050-7887, 11/2019, Volume 21, Issue 11, pp. 1936 - 1945
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are applied during the production of various consumer and industrial goods. As a consequence of their use... 
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12. Previously unidentified sources of perfluoroalkyl and polyfluoroalkyl substances from building materials and industrial fabrics (Electronic supplementary information (ESI) available. See DOI: 10.1039/c9em00091g)
by Raphael M Janousek and Stephan Lebertz and Thomas P Knepper
Environmental Science - Processes & Impacts, ISSN 2050-7887, 01/2019, Volume 21, Issue 11, pp. 1936 - 1945
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are applied during the production of various consumer and industrial goods. As a consequence of their use... 
Facades | Perfluoroalkyls | Building materials | Buildings | Urban runoff | Construction materials | Fluoropolymers | Marine transportation | Chains | Fabrics | Evaporation | Public transportation
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13. Full Text Sampling and simultaneous determination of volatile per- and polyfluoroalkyl substances in wastewater treatment plant air and water
by Dimzon, I.K and Westerveld, J and Gremmel, C and Frömel, T and Knepper, T and de Voogt, P
Analytical and Bioanalytical Chemistry, ISSN 1618-2642, 02/2017, Volume 409, Issue 5, pp. 1395 - 1404
Volatile per- and polyfluoroalkyl substances (PFASs) are often used as precursors in the synthesis of nonvolatile PFASs. The volatile PFASs, which include the... 
Biochemistry, general | Food Science | Effluents | Laboratory Medicine | Air | GC-MS | Chemistry | Analytical Chemistry | Monitoring/Environmental Analysis | WWTP | Volatile PFAS | Characterization and Evaluation of Materials | Influents | PERFLUOROALKYL | CHEMISTRY, ANALYTICAL | ALKYL SUBSTANCES | BIODEGRADATION | FLUOROTELOMER ACRYLATE | ACIDS | BIOCHEMICAL RESEARCH METHODS | PRECURSORS | PERFLUORINATED COMPOUNDS | Waste management | Sewage disposal plants | Iodides | Perfluoroalkyls | Precursors | Cartridges | Plants (organisms) | Volatile compounds | Sampling | Wastewater treatment | Research Paper
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14. Occurrence and Spatial Distribution of Microplastics in River Shore Sediments of the Rhine-Main Area in Germany
by Sascha Klein and Eckhard Worch and Thomas P Knepper
Environmental Science & Technology, ISSN 0013-936X, 05/2015, Volume 49, Issue 10, p. 6070
  Plastic debris is one of the most significant organic pollutants in the aquatic environment. Because of properties such as buoyancy and extreme durability,... 
Buoyancy | Rivers | Plastics | Sediments | Polymers
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15. Using Linoleic Acid Embedded Cellulose Acetate Membranes to in Situ Monitor Polycyclic Aromatic Hydrocarbons in Lakes and Predict Their Bioavailability to Submerged Macrophytes
by Sascha Klein and Eckhard Worch and Thomas P Knepper
Environmental Science & Technology, ISSN 0013-936X, 05/2015, Volume 49, Issue 10, p. 6077
  To date no passive sampler has been used to predict bioavailability of contaminants to macrophytes. Here a novel passive sampler, linoleic acid embedded... 
Membranes | Polycyclic aromatic hydrocarbons | Cellulose | Aquatic plants | Lakes | Bioavailability | Fatty acids
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16. Occurrence and Spatial Distribution of Microplastics in River Shore Sediments of the Rhine-Main Area in Germany
by Klein, Sascha and Worch, Eckhard and Knepper, Thomas P
Environmental Science & Technology, ISSN 0013-936X, 05/2015, Volume 49, Issue 10, pp. 6070 - 6070
Plastic debris is one of the most significant organic pollutants in the aquatic environment. Because of properties such as buoyancy and extreme durability,... 
Journal Article
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17. Using Linoleic Acid Embedded Cellulose Acetate Membranes to in Situ Monitor Polycyclic Aromatic Hydrocarbons in Lakes and Predict Their Bioavailability to Submerged Macrophytes
by Klein, Sascha and Worch, Eckhard and Knepper, Thomas P
Environmental Science & Technology, ISSN 0013-936X, 05/2015, Volume 49, Issue 10, pp. 6077 - 6077
To date no passive sampler has been used to predict bioavailability of contaminants to macrophytes. Here a novel passive sampler, linoleic acid embedded... 
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18. Polyfluorinated chemicals and transformation products
by Knepper, T. P. (Thomas P.) and Lange, F. T and Barceló, Damià
2012, The handbook of environmental chemistry, ISBN 9783642218712, Volume 17., xiii, 172
This volume highlights the synthesis of Polyfluorinated chemicals, focusing on substances with improved application and environmental properties, which are a... 
Environmental chemistry | Environmental aspects | Pollution | Polymers | Polyfluorenes | Analytical Chemistry | Environmental Health | Ecotoxicology | Geochemistry | Environment | Environmental Chemistry | Environmental Monitoring/Analysis
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19. Full Text Instrumental analysis of microplastics—benefits and challenges
by Huppertsberg, Sven and Knepper, Thomas P
Analytical and Bioanalytical Chemistry, ISSN 1618-2642, 10/2018, Volume 410, Issue 25, pp. 6343 - 6352
There is a high demand for easy, cheap, comparable, and robust methods for microplastic (MP) analysis, due to the ever-increasing public and scientific... 
Biochemistry, general | Chemistry | Analytical Chemistry | Spectrometry | Food Science | Monitoring/Environmental Analysis | Thermo-analytical methods | Characterization and Evaluation of Materials | Laboratory Medicine | Microplastic | CHEMISTRY, ANALYTICAL | SEDIMENTS | QUANTIFICATION | BIOCHEMICAL RESEARCH METHODS | ENVIRONMENTAL-SAMPLES | IDENTIFICATION | MASS-SPECTROMETRY | SEA | SPECTROSCOPY | PLASTIC PARTICLES | ECOSYSTEMS | SPATIAL-DISTRIBUTION | Analytical methods | Size distribution | Sample preparation | Microscopy | Microplastics | Sampling | Plastic pollution
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20. Full Text Aerobic biodegration studies of nonylphenol ethoxylates in river water using liquid chromatography - Electrospray tandem mass spectrometry
by Jonkers, Niels and Knepper, Thomas P and De Voogt, Pim
Environmental Science and Technology, ISSN 0013-936X, 01/2001, Volume 35, Issue 2, pp. 335 - 340
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