Maik Jochmann

Dr. rer. nat. Maik Jochmann

Fakultät für Chemie

Room
S05 V02 E25
Phone
+49 201 183 6775

Functions

  • Gruppe der akademischen Mitarbeiterinnen und Mitarbeiter, Prüfungsausschuss B.Sc./M.Sc.-Studiengang Water Science

  • Wissenschaftliche/r Mitarbeiter/in, Prof. Schmidt

Current lectures

The following publications are listed in the online university bibliography of the University of Duisburg-Essen. Further information may also be found on the person's personal web pages.

    Journal articles

  • Hesse, Tobias; Niemann, Felix; Khaliq, Shaista; Köster, Daniel; Enss, Julian; Feld, Christian; Nachev, Milen; Kerpen, Klaus; Jochmann, Maik; Schmidt, Torsten Claus
    A Proof-of-Principle Study for δ¹⁵N Measurements of Aqueous Dissolved Nitrate With a Modified LC-IRMS Interface
    In: Rapid Communications in Mass Spectrometry, Vol. 39, 2025, Nr. 3, e9950
    DOI (Open Access)
  • Köster, Daniel; Hesse, Tobias; Niemann, Felix; Jochmann, Maik A.; Schmidt, Torsten C.
    Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ¹⁵N analysis by LC-IRMS
    In: Analytical and Bioanalytical Chemistry, Vol. 417, 2025, Nr. 10, pp. 2085 – 2096
    DOI (Open Access)
  • Khaliq, Shaista; Schlenker, Alexandra; Kümmel, Steffen; Höhn, Daniel; Jochmann, Maik; Kerpen, Klaus; Fink, Patrick; Weitere, Markus; Schmidt, Torsten Claus
    Spatial and Temporal Patterns of Gammarus sp. in Lowland Streams Analyzed Through Amino Acid Isotope Analysis
    In: International Review of Hydrobiology, 2025, in press
    DOI (Open Access)
  • Khaliq, Shaista; Nachev, Milen; Riekenberg, Philip M.; Jochmann, Maik A.; Vosough, Maryam; Franke, Frederik; Scharsack, Jörn P.; Kurtz, Joachim; Sures, Bernd; van der Meer, Marcel T. J.; Schmidt, Torsten C.
    Trophic dynamics and metabolic pathways in host parasite interactions revealed by nitrogen isotope analysis of amino acids in multiple tissues
    In: Scientific Reports, Vol. 15, 2025, Nr. 1, 32600
    DOI (Open Access)
  • Rockel, Sarah P.; Marks, Robert G. H.; Kerpen, Klaus; Jochmann, Maik A.; Schmidt, Torsten C.
    Two-Dimensional Liquid Chromatography-Isotope Ratio Mass Spectrometry Opens New Possibilities in the Field of Compound-Specific Stable Isotope Analysis
    In: Analytical Chemistry, Vol. 97, 2025, Nr. 5, pp. 2991 – 2997
    DOI
  • Khaliq, Shaista; Jochmann, Maik; Hesse, Tobias; Nachev, Milen; Sures, Bernd; Riekenberg, Philip M.; van der Meer, Marcel T.J.; Schmidt, Torsten Claus
    Compound-specific isotope analysis of amino acids for aquatic systems – Problems, challenges, solutions : A review
    In: Trends in Analytical Chemistry (TrAC), Vol. 181, 2024, 118038
    DOI (Open Access)
  • Martin, Philipp R.; Buchner, Daniel; Jochmann, Maik; Haderlein, Stefan B.
    Dispersive liquid-liquid microextraction as a novel enrichment approach for compound-specific carbon isotope analysis of chlorinated phenols
    In: Analytical Methods, Vol. 16, 2024, Nr. 6, pp. 919 – 929
    DOI
  • Marks, Robert G.H.; Rockel, Sarah P.; Kerpen, Klaus; Somnitz, Holger; Martin, Philipp R.; Jochmann, Maik A.; Schmidt, Torsten C.
    Effects of pH-dependent speciation on the photolytic degradation mechanism of phosphonates
    In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 448, 2024, 115327
    DOI (Open Access)
  • Tintrop, Lucie K.; Bräkling, Steffen; Vetter, Marleen; Eßer, Willi; Drees, Felix; Salemi, Amir; Jochmann, Maik; Klee, Sonja; Schmidt, Torsten Claus
    Evaluation of GC-EI&CI-TOFMS for Nontarget Analysis of Industrial Wastewater Using Hydrophilic-Lipophilic-Balanced SPME
    In: Analytical Chemistry, Vol. 96, 2024, Nr. 16, pp. 6122 – 6130
    DOI
  • Niemann, Felix; Gruhlke, Annika; Kerpen, Klaus; Jochmann, Maik A.; Schmidt, Torsten C.
    Insight into Imidacloprid Degradation through Compound Specific Carbon Isotope Analysis and High-Resolution Mass Spectrometry
    In: ACS ES&T Water, Vol. 4, 2024, Nr. 12, pp. 5437 – 5446
    DOI
  • Hofstetter, Thomas B.; Bakkour, Rani; Buchner, Daniel; Eisenmann, Heinrich; Fischer, Anko; Gehre, Matthias; Haderlein, Stefan B.; Höhener, Patrik; Hunkeler, Daniel; Imfeld, Gwenaël; Jochmann, Maik; Kümmel, Steffen; Martin, Philipp R.; Pati, Sarah G.; Schmidt, Torsten Claus; Vogt, Carsten; Elsner, Martin
    Perspectives of compound-specific isotope analysis of organic contaminants for assessing environmental fate and managing chemical pollution
    In: Nature Water, Vol. 2, 2024, Nr. 1, pp. 14 – 30
    DOI, Online Full Text (Open Access)
  • Enss, Julian; Nachev, Milen; Jochmann, Maik; Schmidt, Torsten Claus; Feld, Christian
    Stable isotopes (¹⁵N) facilitate non-invasive labelling of large quantities of macroinvertebrates across different species and feeding types
    In: Ecology and Evolution, Vol. 14, 2024, Nr. 6, e11539
    DOI, Online Full Text (Open Access)
  • Hesse, Tobias; Nachev, Milen; Khaliq, Shaista; Jochmann, Maik A.; Franke, Frederik; Scharsack, Jörn P.; Kurtz, Joachim; Sures, Bernd; Schmidt, Torsten C.
    A new technique to study nutrient flow in host-parasite systems by carbon stable isotope analysis of amino acids and glucose
    In: Scientific Reports, Vol. 13, 2023, Nr. 1, 1054
    DOI, Online Full Text (Open Access)
  • Tintrop, Lucie K.; Solazzo, Leonardo; Salemi, Amir; Jochmann, Maik A.; Schmidt, Torsten Claus
    Characterization of a hydrophilic-lipophilic balanced SPME material for enrichment of analytes with different polarities from aqueous samples
    In: Advances in Sample Preparation, Vol. 8, 2023, 100099
    DOI (Open Access)
  • Tintrop, Lucie K.; Salemi, Amir; Jochmann, Maik; Engewald, Werner R.; Schmidt, Torsten Claus
    Improving greenness and sustainability of standard analytical methods by microextraction techniques : A critical review
    In: Analytica Chimica Acta, Vol. 1271, 2023, 341468
    DOI
  • Tintrop, Lucie K.; Lieske-Overgrand, Jana R.; Wickneswaran, Kaliyani; Abis, Rukiyye; Brunstermann, Ruth; Jochmann, Maik; Schmidt, Torsten C.
    Isotope-labeling in situ derivatization and HS-SPME arrow GC–MS/MS for simultaneous determination of fatty acids and fatty acid methyl esters in aqueous matrices
    In: Analytical and Bioanalytical Chemistry, Vol. 415, 2023, Nr. 26, pp. 6525 – 6536
    DOI (Open Access)
  • Marks, Robert G.H.; Drees, Felix; Rockel, Sarah; Kerpen, Klaus; Jochmann, Maik A.; Schmidt, Torsten C.
    Mechanistic investigation of phosphonate photolysis in aqueous solution by simultaneous LC-IRMS and HRMS analysis
    In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 439, 2023, 114582
    DOI
  • Vos, Matthijs; Hering, Daniel; Gessner, Mark O.; Leese, Florian; Schäfer, Ralf B.; Tollrian, Ralph; Boenigk, Jens; Haase, Peter; Meckenstock, Rainer; Baikova, Daria; Bayat, Helena; Beermann, Arne; Beißer, Daniela; Beszteri, Bánk; Birk, Sebastian; Boden, Lisa; Brauer, Verena; Brauns, Mario; Buchner, Dominik; Burfeid-Castellanos, Andrea; David, Gwendoline; Deep, Aman; Doliwa, Annemie; Dunthorn, Micah; Enß, Julian; Escobar-Sierra, Camilo; Feld, Christian K.; Fohrer, Nicola; Grabner, Daniel; Hadziomerovic, Una; Jähnig, Sonja C.; Jochmann, Maik; Khaliq, Shaista; Kiesel, Jens; Kuppels, Annabel; Lampert, Kathrin P.; Le, T.T. Yen; Lorenz, Armin W.; Madariaga, Graciela Medina; Meyer, Benjamin; Pantel, Jelena H.; Madge Pimentel, Iris; Mayombo, Ntambwe Serge; Nguyen, Hong Hanh; Peters, Kristin; Pfeifer, Svenja M.; Prati, Sebastian; Probst, Alexander J.; Reiner, Dominik; Rolauffs, Peter; Schlenker, Alexandra; Schmidt, Torsten C.; Shah, Mana; Sieber, Guido; Stach, Tom Lennard; Tielke, Ann-Kathrin; Vermiert, Anna-Maria; Weiss, Martina; Weitere, Markus; Sures, Bernd
    The Asymmetric Response Concept explains ecological consequences of multiple stressor exposure and release
    In: Science of the Total Environment, Vol. 872, 2023, 162196
    DOI
  • Dobaradaran, Sina; Mutke, Xenia A.M.; Schmidt, Torsten Claus; Swiderski, Philipp; De-la-Torre, Gabriel E.; Jochmann, Maik
    Aromatic amines contents of cigarette butts : Fresh and aged cigarette butts vs unsmoked cigarette
    In: Chemosphere, Vol. 301, 2022, 134735
    DOI
  • Marks, Robert; Jochmann, Maik; Brand, Willi A.; Schmidt, Torsten
    How to Couple LC-IRMS with HRMS : A Proof-of-Concept Study
    In: Analytical Chemistry, Vol. 94, 2022, Nr. 6, pp. 2981 – 2987
    DOI
  • Kaziur-Cegla, Wiebke; Wykowski, Lena; Jochmann, Maik; Molt, Karl; Bruchmann, Andreas; Schmidt, Torsten Claus
    In-tube dynamic extraction a green solventless alternative for a sensitive headspace analysis of volatile organic compounds in olive oils
    In: Advances in Sample Preparation, Vol. 1, 2022, 100002
    DOI (Open Access)
  • Kaziur-Cegla, Wiebke; Jochmann, Maik A.; Molt, Karl; Bruchmann, Andreas; Schmidt, Torsten Claus
    In-tube dynamic extraction for analysis of volatile organic compounds in honey samples
    In: Food Chemistry: X, Vol. 14, 2022, 100337
    DOI (Open Access)
  • Hesse, Tobias; Nachev, Milen; Khaliq, Shaista; Jochmann, Maik; Franke, Frederik; Scharsack, Jörn P.; Kurtz, Joachim; Sures, Bernd; Schmidt, Torsten Claus
    Insights into amino acid fractionation and incorporation by compound-specific carbon isotope analysis of three-spined sticklebacks
    In: Scientific Reports, Vol. 12, 2022, Nr. 1, 11690
    DOI, Online Full Text (Open Access)
  • Terhalle, Jens; Nikutta, Simon E.; Krzeciesa, Dawid L.; Lutze, Holger; Jochmann, Maik; Schmidt, Torsten C.
    Linking reaction rate constants and isotope fractionation of ozonation reactions using phenols as probes
    In: Water Research, Vol. 210, 2022, 117931
    DOI
  • Tintrop, Lucie K.; Jochmann, Maik; Beesley, Thomas; Küppers, Marco; Brunstermann, Ruth; Schmidt, Torsten Claus
    Optimization and automation of rapid and selective analysis of fatty acid methyl esters from aqueous samples by headspace SPME arrow extraction followed by GC–MS/MS analysis
    In: Analytical and Bioanalytical Chemistry, Vol. 414, 2022, Nr. 22, pp. 6473 – 6483
    DOI (Open Access)
  • Martin, Philipp R.; Buchner, Daniel; Jochmann, Maik; Elsner, Martin; Haderlein, Stefan B.
    Two Pathways Compete in the Mn(II)-Catalyzed Oxidation of Aminotrismethylene Phosphonate (ATMP)
    In: Environmental Science & Technology, Vol. 56, 2022, Nr. 7, pp. 4091 – 4100
    DOI
  • Dobaradaran, Sina; Schmidt, Torsten Claus; Kaziur-Cegla, Wiebke; Jochmann, Maik
    BTEX compounds leachates from cigarette butts into water environment : A primary study
    In: Environmental Pollution, Vol. 269, 2021, pp. 116185
    DOI
  • Khademi, Seyed Mohammad; Salemi, Amir; Jochmann, Maik; Joksimoski, Sasho; Telgheder, Ursula
    Development and comparison of direct immersion solid phase micro extraction Arrow-GC-MS for the determination of selected pesticides in water
    In: Microchemical Journal, Vol. 164, 2021, 106006
    DOI
  • Vivas Muñoz, Jenny C.; Feld, Christian; Hilt, Sabine; Manfrin, Alessandro; Nachev, Milen; Köster, Daniel; Jochmann, Maik; Schmidt, Torsten Claus; Sures, Bernd; Ziková, Andrea; Knopf, Klaus
    Eye fluke infection changes diet composition in juvenile European perch (Perca fluviatilis)
    In: Scientific Reports, Vol. 11, 2021, Nr. 1, 3440
    DOI (Open Access)
  • Becker, Christian; Jochmann, Maik; Teutenberg, Thorsten; Schmidt, Torsten Claus
    A nebulizer interface for liquid chromatography - Flame ionization detection : Development and validation
    In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, Vol. 206, 2020, 120229
    DOI
  • Willach, Sarah; Lutze, Holger V.; Somnitz, Holger; Terhalle, Jens; Stojanovic, Nenad; Lüling, Michelle; Jochmann, Maik A.; Hofstetter, Thomas B.; Schmidt, Torsten Claus
    Carbon Isotope Fractionation of Substituted Benzene Analogs during Oxidation with Ozone and Hydroxyl Radicals : How Should Experimental Data Be Interpreted?
    In: Environmental Science & Technology, Vol. 54, 2020, Nr. 11, pp. 6713 – 6722
    DOI, Online Full Text (Open Access)
  • Becker, Christian; Deeb, Ahmad A.; Teutenberg, Thorsten; Jochmann, Maik; Schmidt, Torsten Claus
    Determination of liquid chromatography/flame ionization detection response factors for N-heterocycles, carboxylic acids, halogenated compounds, and others
    In: Analytical and Bioanalytical Chemistry, Vol. 412, 2020, Nr. 1, pp. 171 – 179
    DOI
  • Kaziur-Cegla, Wiebke; Salemi, Amir; Jochmann, Maik; Schmidt, Torsten Claus
    Optimization and validation of automated solid-phase microextraction arrow technique for determination of phosphorus flame retardants in water
    In: Journal of Chromatography A, Vol. 1626, 2020, pp. 461349
    DOI
  • Dobaradaran, Sina; Schmidt, Torsten Claus; Lorenzo-Parodi, Nerea; Kaziur-Cegla, Wiebke; Jochmann, Maik; Nabipour, Iraj; Lutze, Holger; Telgheder, Ursula
    Polycyclic aromatic hydrocarbons (PAHs) leachates from cigarette butts into water
    In: Environmental Pollution, Vol. 259, 2020, pp. 113916
    DOI
  • Martin, Philipp R.; Buchner, Daniel; Jochmann, Maik; Haderlein, Stefan B.
    Stable carbon isotope analysis of polyphosphonate complexing agents by anion chromatography coupled to isotope ratio mass spectrometry : Method development and application
    In: Analytical and Bioanalytical Chemistry, Vol. 412, 2020, Nr. 20, pp. 4827 – 4835
    DOI
  • Gilbert, Beric M.; Nachev, Milen; Jochmann, Maik A.; Schmidt, Torsten Claus; Köster, Daniel; Sures, Bernd; Avenant-Oldewage, Annemariè
    Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa
    In: International Journal for Parasitology: Parasites and Wildlife, Vol. 12, 2020, pp. 134 – 141
    DOI (Open Access)
  • Gilbert, Beric M.; Nachev, Milen; Jochmann, Maik; Schmidt, Torsten Claus; Köster, Daniel; Sures, Bernd; Avenant-Oldewage, Annemariè
    You are how you eat : Differences in trophic position of two parasite species infecting a single host according to stable isotopes
    In: Parasitology Research, Vol. 119, 2020, Nr. 4, pp. 1393 – 1400
    DOI (Open Access)
  • Schulte, S.M.; Jochmann, Maik; Wolbert, Jens-Benjamin; Gehrke, Tilman; Schmidt, Torsten Claus
    A centrifuge tube reactor for the determination of bacterial methane oxidation enrichment factors without influence of diffusion related isotope fractionation
    In: Science of the Total Environment, Vol. 659, 2019, pp. 1382 – 1386
    DOI
  • Akinlua, Akinsehinwa; Jochmann, Maik; Lorenzo-Parodi, Nerea; Stojanovic, Nenad; Kaziur, Wiebke; Schmidt, Torsten C.
    A green approach for the extraction of diamondoids from petroleum source rock
    In: Analytica Chimica Acta, Vol. 1091, 2019, pp. 23 – 29
    DOI
  • Becker, Christian; Jochmann, Maik; Schmidt, Torsten Claus
    An overview of approaches in liquid chromatography flame ionization detection
    In: Trends in Analytical Chemistry (TrAC), Vol. 110, 2019, pp. 143 – 149
    DOI, Online Full Text (Open Access)
  • Schulte, Simone M.; Köster, Daniel; Jochmann, Maik; Meckenstock, Rainer
    Applying reverse stable isotope labeling analysis by mid-infrared laser spectroscopy to monitor BDOC in recycled wastewater
    In: Science of the Total Environment, Vol. 665, 2019, pp. 1064 – 1072
    DOI
  • Kaziur, Wiebke; Salemi, Amir; Jochmann, Maik; Schmidt, Torsten Claus
    Automated determination of picogram-per-liter level of water taste and odor compounds using solid-phase microextraction arrow coupled with gas chromatography-mass spectrometry
    In: Analytical and Bioanalytical Chemistry, 2019
    DOI
  • Dobaradaran, Sina; Schmidt, Torsten Claus; Lorenzo-Parodi, Nerea; Jochmann, Maik; Nabipour, Iraj; Raeisi, Alireza; Stojanovic, Nenad; Mahmoodi, Marzieh
    Cigarette butts: An overlooked source of PAHs in the environment?
    In: Environmental Pollution, Vol. 249, 2019, pp. 932 – 939
    DOI
  • Kalus, Mark; Lanyumba, Riskyanti; Lorenzo-Parodi, Nerea; Jochmann, Maik; Kerpen, Klaus; Hagemann, Ulrich; Schmidt, Torsten Claus; Barcikowski, Stephan; Gökce, Bilal
    Correction : Determining the role of redox-active materials during laser-induced water decomposition
    In: Physical Chemistry, Chemical Physics (PCCP), Vol. 21, 2019, Nr. 43, pp. 24239
    DOI (Open Access)
  • Becker, Christian; Jochmann, Maik; Schmidt, Torsten Claus
    Determination of liquid chromatography/flame ionization detection response factors for alcohols, ketones, and sugars
    In: Analytical and Bioanalytical Chemistry, Vol. 411, 2019, Nr. 12, pp. 2635 – 2644
    DOI
  • Kalus, Mark; Lanyumba, Riskyanti; Lorenzo-Parodi, Nerea; Jochmann, Maik; Kerpen, Klaus; Hagemann, Ulrich; Schmidt, Torsten Claus; Barcikowski, Stephan; Gökce, Bilal; Lorenzo Parodi, Nerea
    Determining the role of redox-active materials during laser-induced water decomposition
    In: Physical Chemistry, Chemical Physics (PCCP), Vol. 21, 2019, Nr. 34, pp. 18636 – 18651
    DOI
  • Köster, Daniel; Jochmann, Maik; Lutze, Holger; Schmidt, Torsten Claus
    Monitoring of the total carbon and nitrogen balance during the mineralization of nitrogen containing compounds by heat activated persulfate
    In: Chemical Engineering Journal, Vol. 367, 2019, pp. 160 – 168
    DOI
  • Köster, Daniel; Sanchez Villalobos, Irene M.; Jochmann, Maik; Brand, Willi A.; Schmidt, Torsten Claus
    New Concepts for the Determination of Oxidation Efficiencies in Liquid Chromatography-Isotope Ratio Mass Spectrometry
    In: Analytical Chemistry, Vol. 91, 2019, Nr. 8, pp. 5067 – 5073
    DOI (Open Access)
  • Lorenzo-Parodi, Nerea; Kaziur, Wiebke; Stojanovic, Nenad; Jochmann, Maik; Schmidt, Torsten Claus
    Solventless microextraction techniques for water analysis
    In: Trends in Analytical Chemistry (TrAC), Vol. 113, 2019, pp. 321 – 331
    DOI, Online Full Text (Open Access)
  • Sures, Bernd; Nachev, Milen; Gilbert, Beric M.; Dos Santos, Quinton Marco; Jochmann, Maik; Köster, Daniel; Schmidt, Torsten Claus; Avenant-Oldewage, Annemarié
    The monogenean Paradiplozoon ichthyoxanthon behaves like a micropredator on two of its hosts, as indicated by stable isotopes
    In: Journal of Helminthology, Vol. 93, 2019, Nr. 1, pp. 71 – 75
    DOI
  • Schulte, Marcel; Jochmann, Maik; Gehrke, Tilman; Denecke, Martin; Schmidt, Torsten Claus
    Carbon Isotopic Fractionation via Diffusion in a Coarse Material
    In: Geochemistry, Geophysics, Geosystems, Vol. 19, 2018, Nr. 9, pp. 3246 – 3253
    DOI (Open Access)
  • Willach, Sarah; Lutze, Holger; Eckey, Kevin; Löppenberg, Katja; Lüling, Michelle; Wolbert, Jens-Benjamin; Kujawinski, Dorothea M.; Jochmann, Maik; Karst, Uwe; Schmidt, Torsten Claus
    Direct Photolysis of Sulfamethoxazole Using Various Irradiation Sources and Wavelength Ranges - Insights from Degradation Product Analysis and Compound-Specific Stable Isotope Analysis
    In: Environmental Science & Technology, Vol. 52, 2018, Nr. 3, pp. 1225 – 1233
    DOI
  • Köster, Daniel; Wolbert, Jens-Benjamin; Schulte, Marcel; Jochmann, Maik; Schmidt, Torsten Claus
    Origin of Xylitol in Chewing Gum : A Compound-Specific Isotope Technique for the Differentiation of Corn- and Wood-Based Xylitol by LC-IRMS
    In: Journal of Agricultural and Food Chemistry, Vol. 66, 2018, Nr. 8, pp. 2015 – 2020
    DOI
  • Schulte, Marcel; Jochmann, Maik; Gehrke, Tobias; Thom, Andrea; Ricken, Tim; Denecke, Martin; Schmidt, Torsten Claus
    Characterization of methane oxidation in a simulated landfill cover system by comparing molecular and stable isotope mass balances
    In: Waste Management, Vol. 69, 2017, pp. 281 – 288
    DOI
  • Willach, Sarah; Lutze, Holger; Eckey, Kevin; Löppenberg, Katja; Lüling, Michelle; Terhalle, Jens; Wolbert, Jens-Benjamin; Jochmann, Maik; Karst, Uwe; Schmidt, Torsten Claus
    Degradation of sulfamethoxazole using ozone and chlorine dioxide : Compound-specific stable isotope analysis, transformation product analysis and mechanistic aspects
    In: Water Research, Vol. 122, 2017, pp. 280 – 289
    DOI
  • Osorio Barajas, Xochitli L.; Hüffer, Thorsten; Mettig, Pascal; Schilling, Beat; Jochmann, Maik; Schmidt, Torsten Claus
    Investigation of carbon-based nanomaterials as sorbents for headspace in-tube extraction of polycyclic aromatic hydrocarbons
    In: Analytical and Bioanalytical Chemistry, Vol. 409, 2017, Nr. 15, pp. 3861 – 3870
    DOI
  • Dong, Xiyang; Jochmann, Maik; Elsner, Martin; Meyer, Armin H.; Bäcker, Leonard E.; Rahmatullah, Mona; Schunk, Daniel; Lens, Guido; Meckenstock, Rainer
    Monitoring Microbial Mineralization Using Reverse Stable Isotope Labeling Analysis by Mid-Infrared Laser Spectroscopy
    In: Environmental Science & Technology, Vol. 51, 2017, Nr. 20, pp. 11876 – 11883
    DOI (Open Access)
  • Barajas, Xochitli L. Osorio; Jochmann, Maik; Hüffer, Thorsten; Schilling, Beat; Schmidt, Torsten Claus
    Sorbent material characterization using in-tube extraction needles as inverse gas chromatography column
    In: Journal of Separation Science, Vol. 40, 2017, Nr. 11, pp. 2390 – 2397
    DOI
  • Nachev, Milen; Jochmann, Maik; Walter, Friederike; Wolbert, Jens-Benjamin; Schulte, Marcel; Schmidt, Torsten Claus; Sures, Bernd
    Understanding trophic interactions in host-parasite associations using stable isotopes of carbon and nitrogen
    In: Parasites and Vectors, Vol. 10, 2017, Nr. 1
    DOI, Online Full Text (Open Access)
  • Weigold, Pascal; El-Hadidi, Mohamed; Ruecker, Alexander; Huson, Daniel H.; Scholten, Thomas; Jochmann, Maik; Kappler, Andreas; Behrens, Sebastian
    A metagenomic-based survey of microbial (de)halogenation potential in a German forest soil
    In: Scientific Reports, Vol. 6, 2016, pp. 28958
    DOI (Open Access)
  • Dunkel, Thiemo; Lizette de León Gallegos, Erika; Schönsee, Carina D.; Hesse, Tobias; Jochmann, Maik; Wingender, Jost; Denecke, Martin
    Evaluating the influence of wastewater composition on the growth of Microthrix parvicella by GCxGC/qMS and real-time PCR
    In: Water Research, Vol. 88, 2016, pp. 510 – 523
    DOI
  • Kremser, Andreas; Jochmann, Maik; Schmidt, Torsten Claus
    PAL SPME Arrow — evaluation of a novel solid-phase microextraction device for freely dissolved PAHs in water
    In: Analytical and Bioanalytical Chemistry, Vol. 408, 2016, Nr. 3, pp. 943 – 952
    DOI (Open Access)
  • Kupilas, Benjamin; Hering, Daniel; Lorenz, Armin; Jochmann, Maik; G. McKie, Brendan; Friberg, Nikolai
    River restoration and the trophic structure of benthic invertebrate communities across 16 European restoration projects
    In: Hydrobiologia, Vol. 169, 2016, Nr. 1, pp. 105 – 120
    DOI
  • Kremser, Andreas; Jochmann, Maik; Schmidt, Torsten Claus
    Systematic comparison of static and dynamic headspace sampling techniques for gas chromatography
    In: Analytical and Bioanalytical Chemistry, Vol. 408, 2016, Nr. 24, pp. 6567 – 6579
    DOI
  • Rahman, Mohammed M.; Barajas, Xochitli L. O.; Luján, Jacobo L. H.; Jochmann, Maik; Mayer, Christian; Schmidt, Torsten Claus
    Core-Shell hybrid particles by alternating copolymerization of ionic liquid monomers from silica as sorbent for solid phase microextraction
    In: Macromolecular Materials and Engineering, Vol. 300, 2015, Nr. 11, pp. 1049 – 1056
    DOI
  • Mogusu, Emmanuel Onyonka; Wolbert, Jens-Benjamin; Kujawinski, Dorothea M.; Jochmann, Maik; Elsner, Martin
    Dual element (15N/14N, 13C/12C) isotope analysis of glyphosate and AMPA by derivatization-gas chromatography isotope ratio mass spectrometry (GC/IRMS) combined with LC/IRMS
    In: Analytical and Bioanalytical Chemistry, Vol. 407, 2015, Nr. 18, pp. 5249 – 5260
    DOI
  • Weigold, Pascal; Ruecker, Alexander; Jochmann, Maik; Osorio, Xochitli; Lege, Sascha; Zwiener, C.; Kappler, Andreas; Behrens, Sebastian
    Formation of chloroform and tetrachloroethene by Sinorhizobium meliloti strain 1021
    In: Letters in Applied Microbiology, Vol. 61, 2015, Nr. 4, pp. 346 – 353
    DOI
  • Ruecker, A.; Weigold, P.; Behrens, S.; Jochmann, Maik; Barajas, X. L. Osorio; Kappler, A.
    Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia - Role of abiotic and biotic processes
    In: Environmental Chemistry, Vol. 12, 2015, Nr. 4, pp. 406 – 414
    DOI
  • Akinlua, Akinsehinwa; Schmidt, Torsten Claus; Jochmann, Maik
    Ionic Liquid as Green Solvent for Leaching of Polycyclic Aromatic Hydrocarbons from Petroleum Source Rock
    In: Industrial and Engineering Chemistry Research (I&EC research), Vol. 54, 2015, Nr. 51, pp. 12960 – 12965
    DOI
  • Akinlua, Akinsehinwa; Jochmann, Maik; Schmidt, Torsten Claus
    Microwave-assisted ionic liquid extraction of n-alkanes and isoprenoid hydrocarbons from petroleum source rock
    In: Chromatographia: an international journal for rapid communication in chromatography, electrophoresis, and associated techniques, Vol. 78, 2015, Nr. 17, pp. 1201 – 1209
    DOI
  • Blessing, Michaela; Jochmann, Maik; Haderlein, Stefan B.; Schmidt, Torsten Claus
    Optimization of a large-volume injection method for compound-specific isotope analysis of polycyclic aromatic compounds at trace concentrations
    In: Rapid Communications in Mass Spectrometry, Vol. 29, 2015, Nr. 24, pp. 2349 – 2360
    DOI
  • Laaks, Jens; Jochmann, Maik; Schilling, Beat; Schmidt, Torsten Claus
    Optimization strategies of in-tube extraction (ITEX) methods
    In: Analytical and Bioanalytical Chemistry, Vol. 407, 2015, Nr. 22, pp. 6827 – 6838
    DOI, Online Full Text (Open Access)
  • Zhang, Lijun; Thevis, Mario; Piper, Thomas; Jochmann, Maik; Wolbert, Jens-Benjamin; Kujawinski, Dorothea M.; Wiese, Steffen; Teutenberg, Thorsten; Schmidt, Torsten Claus
    Carbon isotope ratio analysis of steroids by high temperature liquid chromatography - isotope ratio mass spectrometry
    In: Analytical Chemistry, Vol. 86, 2014, Nr. 5, pp. 2297 – 2302
    DOI
  • Laaks, Jens; Jochmann, Maik; Schilling, Beat; Molt, Karl; Schmidt, Torsten Claus
    In-tube extraction-GC-MS as a high-capacity enrichment technique for the analysis of alcoholic beverages
    In: Journal of Agricultural and Food Chemistry, Vol. 62, 2014, Nr. 14, pp. 3081 – 3091
    DOI
  • Ruecker, A.; Weigold, P.; Behrens, S.; Jochmann, Maik; Laaks, J.; Kappler, A.
    Predominance of biotic over abiotic formation of halogenated hydrocarbons in hypersaline sediments in Western Australia
    In: Environmental Science & Technology, Vol. 48, 2014, Nr. 16, pp. 9170 – 9178
    DOI
  • Kujawinski, Dorothea M.; Wolbert, Jens-Benjamin; Zhang, Lijun; Jochmann, Maik; Widory, David; Baran, Nicole; Schmidt, Torsten Claus
    Carbon isotope ratio measurements of glyphosate and AMPA by liquid chromatography coupled to isotope ratio mass spectrometry
    In: Analytical and Bioanalytical Chemistry, Vol. 405, 2013, Nr. 9, pp. 2869 – 2878
    DOI
  • Schmidt, Torsten Claus; Jochmann, Maik; Laaks, Jens
    Empfindlich, automatisch und ohne Lösungsmittel
    In: Nachrichten aus der Chemie, Vol. 61, 2013, pp. 54 – 56
    DOI
  • Hüffer, Thorsten; Osorio, Xochitli; Jochmann, Maik; Schilling, Beat; Schmidt, Torsten Claus
    Multi-walled carbon nanotubes as sorptive material for solventless in-tube microextraction (ITEX2) - a factorial design study
    In: Analytical and Bioanalytical Chemistry, Vol. 405, 2013, Nr. 26, pp. 8387 – 8395
    DOI
  • Wuerfel, Oliver; Greule, Markus; Keppler, Frank; Jochmann, Maik; Schmidt, Torsten Claus
    Position-specific isotope analysis of the methyl group carbon in methylcobalamin for the investigation of biomethylation processes
    In: Analytical and Bioanalytical Chemistry, Vol. 405, 2013, Nr. 9, pp. 2833 – 2841
    DOI
  • Zhang, Lijun; Kujawinski, Dorothea M.; Federherr, Eugen; Schmidt, Torsten Claus; Jochmann, Maik
    Caffeine in your drink : natural or synthetic?
    In: Analytical Chemistry, Vol. 84, 2012, Nr. 6, pp. 2805 – 2810
    DOI
  • Elsner, Martin; Jochmann, Maik; Hofstetter, Thomas B.; Hunkeler, Daniel; Bernstein, Anat; Schmidt, Torsten Claus; Schimmelmann, Arndt
    Current challenges in compound-specific stable isotope analysis of environmental organic contaminants
    In: Analytical and Bioanalytical Chemistry, Vol. 403, 2012, Nr. 9, pp. 2471 – 2491
    DOI
  • Akinlua, Akinsehinwa; Jochmann, Maik; Qian, Yuan; Sulkowski, Martin; Schmidt, Torsten Claus
    Factors controlling leaching of polycyclic aromatic hydrocarbons from petroleum source rock using nonionic surfactant
    In: Chromatographia: an international journal for rapid communication in chromatography, electrophoresis, and associated techniques, Vol. 75, 2012, Nr. 5-6, pp. 213 – 221
    DOI
  • Laaks, Jens; Letzel, Thomas; Schmidt, Torsten Claus; Jochmann, Maik
    Fingerprinting of red wine by headspace solid-phase dynamic extraction of volatile constituents
    In: Analytical and Bioanalytical Chemistry, Vol. 403, 2012, Nr. 8, pp. 2429 – 2436
    DOI
  • Schmidt, Torsten Claus; Jochmann, Maik
    Origin and Fate of Organic Compounds in Water : Characterization by Compound-Specific Stable Isotope Analysis
    In: Annual Review of Analytical Chemistry, Vol. 5, 2012, Nr. 5, pp. 133 – 155
    DOI
  • Laaks, Jens; Jochmann, Maik; Schmidt, Torsten Claus
    Solvent-free microextraction techniques in gas chromatography
    In: Analytical and Bioanalytical Chemistry, Vol. 402, 2012, Nr. 2, pp. 565 – 571
    DOI
  • Kujawinski, Dorothea M.; Zhang, Lijun; Schmidt, Torsten Claus; Jochmann, Maik
    When other separation techniques fail : compound-specific carbon isotope ratio analysis of sulfonamide containing pharmaceuticals by high-temperature-liquid chromatography-isotope ratio mass spectrometry
    In: Analytical Chemistry, Vol. 84, 2012, Nr. 18, pp. 7656 – 7663
    DOI, Online Full Text (Open Access)
  • Bernstein, Anat; Shouakar-Stash, Orfan; Ebert, Karin; Laskov, Christine; Hunkeler, Daniel; Jeannottat, Simon; Sakaguchi-Söder, Kaori; Laaks, Jens; Jochmann, Maik; Cretnik, Stefan; Jager, Johannes; Haderlein, Stefan B.; Schmidt, Torsten Claus; Aravena, Ramon; Elsner, Martin
    Compound-specific chlorine isotope analysis : a comparison of gas chromatography/isotope ratio mass spectrometry and gas chromatography/quadrupole mass spectrometry methods in an interlaboratory study
    In: Analytical Chemistry, Vol. 83, 2011, Nr. 20, pp. 7624 – 7634
    DOI, Online Full Text (Open Access)
  • Zhang, Lijun; Kujawinski, Dorothea M.; Jochmann, Maik; Schmidt, Torsten Claus
    High-temperature reversed-phase liquid chromatography coupled to isotope ratio mass spectrometry
    In: Rapid Communications in Mass Spectrometry, Vol. 25, 2011, Nr. 20, pp. 2971 – 2980
    DOI
  • Akinlua, A.; Jochmann, Maik; Laaks, J.; Ewert, A.; Schmidt, Torsten Claus
    Microwave-assisted nonionic surfactant extraction of aliphatic hydrocarbons from petroleum source rock
    In: Analytica Chimica Acta, Vol. 691, 2011, Nr. 1-2, pp. 48 – 55
    DOI
  • Laaks, Jens; Jochmann, Maik; Schilling, Beat; Schmidt, Torsten Claus
    In-tube extraction of volatile organic compounds from aqueous samples : an economical alternative to purge and trap enrichment
    In: Analytical Chemistry, Vol. 82, 2010, Nr. 18, pp. 7641 – 7648
    DOI
  • Kujawinski, Dorothea M.; Stephan, Manuel; Jochmann, Maik; Krajenke, Karen; Haas, Joe; Schmidt, Torsten Claus
    Stable carbon and hydrogen isotope analysis of methyl tert-butyl ether and tert-amyl methyl ether by purge and trap-gas chromatography-isotope ratio mass spectrometry : method evaluation and application
    In: Journal of Environmental Monitoring (JEM), Vol. 12, 2010, Nr. 1, pp. 347 – 354
    DOI
  • Telgheder, Ursula; Malinowski, Malwin; Jochmann, Maik
    Determination of volatile organic compounds by solid-phase microextraction-gas chromatography-differential mobility spectrometry
    In: International Journal for Ion Mobility Spectrometry, Vol. 12, 2009, Nr. 4, pp. 123 – 130
    DOI
  • Jochmann, Maik; Steinmann, Dirk; Stephan, Manuel; Schmidt, Torsten Claus
    Flow iInjection analysis−isotope ratio mass spectrometry for bulk carbon stable isotope analysis of alcoholic beverages
    In: Journal of Agricultural and Food Chemistry, Vol. 57, 2009, Nr. 22, pp. 10489 – 10496
    DOI
  • Jochmann, Maik; Yuan, Xue; Schilling, Beat; Schmidt, Torsten Claus
    In-tube extraction for enrichment of volatile organic hydrocarbons from aqueous samples
    In: Journal of Chromatography A, Vol. 1179, 2008, Nr. 2, pp. 96 – 105
    DOI
  • Blessing, Michaela; Jochmann, Maik; Schmidt, Torsten Claus
    Pitfalls in compound-specific isotope analysis of environmental samples
    In: Analytical and Bioanalytical Chemistry, Vol. 390, 2008, Nr. 2, pp. 591 – 603
    DOI
  • Jochmann, Maik; Yuan, Xue; Schmidt, Torsten Claus
    Determination of volatile organic hydrocarbons in water samples by solid-phase dynamic extraction
    In: Analytical and Bioanalytical Chemistry, Vol. 387, 2007, Nr. 6, pp. 2163 – 2174
    DOI
  • Gocht, Tilman; Barth, Johannes A. C.; Epp, Michaela; Jochmann, Maik; Blessing, Michaela; Schmidt, Torsten Claus; Grathwohl, Peter
    Indications for pedogenic formation of perylene in a terrestrial soil profile : depth distribution and first results from stable carbon isotope ratios
    In: Applied Geochemistry, Vol. 22, 2007, Nr. 12, pp. 2652 – 2663
    DOI
  • Schmidt, Torsten Claus; Jochmann, Maik; Blessing, Michaela
    Isotopenanalyse : ein neues Werkzeug in der Umweltanalytik
    In: Nachrichten aus der Chemie, Vol. 55, 2007, Nr. 5, pp. 536 – 539
    DOI
  • Jochmann, Maik; Blessing, Michaela; Haderlein, Stefan B.; Schmidt, Torsten Claus
    A new approach to determine method detection limits for compound-specific isotope analysis of volatile organic compounds
    In: Rapid Communications in Mass Spectrometry, Vol. 20, 2006, Nr. 24, pp. 3639 – 3648
    DOI
  • Jochmann, Maik; Kmiecik, Magda P.; Schmidt, Torsten Claus
    Solid-phase dynamic extraction for the enrichment of polar volatile organic compounds from water
    In: Journal of Chromatography A, Vol. 1115, 2006, Nr. 1/2, pp. 208 – 216
    DOI

    • Book articles / Proceedings papers

  • Nachev, Milen; Riekenberg, Philip M.; Jochmann, Maik A.; Born-Torrijos, Ana; van der Meer, Marcel T. J.; Smit, Nico J.; Schmidt, Torsten C.; Thieltges, David W.; Sures, Bernd
    Host-Parasite Trophic Interactions as Revealed by Stable Isotope Analyses : Determinants for Trophic and Isotopic Niches of Hosts and Their Associated Parasites
    In: Aquatic Parasitology: Ecological and Environmental Concepts and Implications of Marine and Freshwater Parasites / Smit, Nico J.; Sures, Bernd (Eds.). Cham: Springer Nature, 2025, pp. 415 – 442
    DOI (Open Access)

    • Books, Collections, Proceedings

  • Jochmann, Maik; Schmidt, Torsten Claus
    Compound-specific Stable Isotope Analysis
    Cambridge: Royal Society of Chemistry Publishing, 2012

    • Posters / Proceedings posters

  • Dunkel, Thiemo; Lizette de León Gallegos, Erika; Schönsee, Carina D.; Hesse, Tobias; Jochmann, Maik; Denecke, Martin; Wingender, Jost
    Evaluating influences of wastewater composition on the growth of M. Parvicella by GCxGC-qMS and QPCR : poster presentation
    12th IWA Leading Edge Conference on Water and Wastewater Technologies, 30.05.-03.06.2015, Hongkong,
    2015

RESEARCH INTERESTS

Development of enrichment techniques for Compound Specific Isotope Analysis


EDUCATION
1995 Abitur (A-Level equiv.)
1996 – 1997 Biochemistry studies at the Ruhr-University Bochum
1997 – 2003 Chemistry at the Westfalien-Wilhelms University Münster
Diploma Thesis at the Center for Applied Geoscience (ZAG) in the group of Prof. Stefan B. Haderlein and external supervision by Prof. Dr. Karl Cammann (University Münster) with the subject “Determination of heterocyclic compounds in groundwater with direct-aqueous injection GC/MS”.
2003 - 2006 PhD at the Center for Applied Geoscience (ZAG) in Tübingen in the Environmental Minarology Group of
Prof. Stefan B. Haderlein
Since 2006 Research scientist in the group Prof. Torsten C. Schmidt of chair for Instrumental Analytical Chemistry (IAC) at the University Duisburg-Essen

PROFESSIONAL EXPERIENCES
Extraction Techniques such as:
- Solid-phase microextraction (SPME)
- Solid-phase dynamic extraction (SPDE)
- In-tube extraction (ITEX)
- Accelerated Solvent Extraction (ASE)
- Purge & Trap (P&T)

Separation techniques:
- GC/MS/FID/ECD/TCD
- HPLC/UV/Vis/FD/MS

Injection techniques:
- Large Volume Injection (LVI)
- Direct Aqueous Injection (DAI)

Compound Specific Isotope Analysis:
- GC/IRMS
- LC/IRMS

Spectroscopy:
- UV/vis

MEMBER
German Chemical Society (GDCh)
Divisions on:
Analytical Chemistry
Water Chemistry
Benelux Association for Stable Isotope Scientists (BASIS)

REVIEWER ACTIVITY
- Journal of Separation Science
- Environmental Science & Technology