[134]   S. Löbbecke, A. Pape, L. Montero, F. Uteschil, J. F. Ayala-Cabrera, O. J. Schmitz, Improving the reliability of phthalate esters analysis in water samples by gas chromatography-tube plasma ionization-high-resolution mass spectrometry (GC-TPI-HRMS), Talanta (2025) 285:127388 https://doi.org/10.1016/j.talanta.2024.127388

[133]   Y. Kong, J. Riebe, M. Feßner, T. Schaller, C. Wölper, F. Stappert, S. W. Meckelmann, M. Krajnc, P. Weyrauch, O. J. Schmitz, C. Merten, J. Niemeyer, X. Hu, R. U. Meckenstock, A CoA-transferase and an acyl-CoA dehydrogenase that convert 2-(carboxymethyl)cyclohexane-1-carboxyl-CoA in anaerobic naphthalene degradation, Environmental Microbiology (2024) 26e:70013 https://doi.org/10.1111/1462-2920.70013

[132]    D. Li, X. Du, W. Bai, O. J. Schmitz, Sample preparation of Hedyotis diffusa Wild. for two-dimensional gas chromatography-time of flight mass spectroscopic analysis enhanced chemical profiling, Pharmaceutical Science Advances (2024) 2:100056 https://doi.org/10.1016/j.pscia.2024.100056

[131]   P. Wittenhofer, L. Kiesewetter, O. J. Schmitz, S. W. Meckelmann, Investigation of the Cholesterol Biosynthesis by Heart-Cut Liquid Chromatography and Mass Spectrometric Detection, Journal of Chromatography A (2024) 1738:465475 https://doi.org/10.1016/j.chroma.2024.465475

[130]   A. Pape, J. F. Ayala-Cabrera, F. Stappert, F. Uteschil, C. Thom, Y. Terui, S. Yoshioka, O. J. Schmitz, Development of an ultrasonic nebulization system for an inverse low temperature plasma ionization source, Journal of the American Society for Mass Spectrometry (2024) 35:2918-2925 https://doi.org/10.1021/jasms.4c00259

[129]   P. Wittenhofer, L. Montero, O. J. Schmitz, S. W. Meckelmann, Automated green sample preparation for quantitative extraction of lipids in different sample matrices, Green Analytical Chemistry (2024) 10:100128 https://doi.org/10.1016/j.greeac.2024.100128

[128]   S. Imada, H. Shin, S. Khawaled, S. W. Meckelmann, C. A Whittaker, R. Oliveira Corrêa, Y. Lu, G. Tie, D. Pradhan, G. Calibasi-Kocal, L. Martins Nascentes Melo, G. Allies, J. Rösler, P. Wittenhofer, J. Krystkiewicz, O. J. Schmitz, J. Roper, M. Aurelio Ramirez Vinolo, L. Ricciardiello, E. C. Lien, M. G. Vander Heiden, R. A. Shivdasani, C.-W. Cheng, A. Tasdogan, Ö. H Yilmaz, Post-fast refeeding enhances intestinal stem cell-mediated regeneration and tumourigenesis through mTORC1-dependent polyamine synthesis, Nature (2024) 633:895-904 https://doi.org/10.1038/s41586-024-07840-z 

[127]   E. Sekera, A. Somogyi, Z. Takats, F. Stappert, C. Thom, O. J. Schmitz, C. Moeckel, B. Paizs, J. Sommertune, Utilization of bis-MPA Dendrimers for the Calibration of Ion Mobility Collision Cross Section Calculations, Journal of the American Society for Mass Spectrometry (2024) 35:1101–1109 doi.org/10.1021/jasms.3c00428

[126]   Z. Yao, K. Zhu, T. Gu, O. J. Schmitz, D. Li, An active derivatization detection method for inline monitoring the isolation of carbohydrates by preparative liquid chromatography, Journal of Chromatography A (2024) 1719:464730 doi.org/10.1016/j.chroma.2024.464730

[125]   A. K. Mallik, L. Montero, S. W. Meckelmann O. J. Schmitz, Facile preparation of embedded polar group-containing pentafluorophenyl stationary phases for highly selective separations of diverse analytes, Journal of Chromatography A (2024) 1717:464688 https://doi.org/10.1016/j.chroma.2024.464688

[124]   M. Rogava, T. J. Aprati, W.-Y. Chi, J. C. Melms, C. Hug, S.H. Davis, E.M. Earlie, C. Chung, S. K. Deshmukh, S. Wu, G. Sledge, S. Tang, P. Ho, A. D. Amin, L. Caprio, C. Gurjao, S. Tagore, B. Ngo, M. J. Lee, G. Zanetti, Y. Wang, S. Chen, W. Ge, L. Martins Nascentes Melo, G. Akkies, J. Rösler, G. T. Gibney, O. J. Schmitz, M. Sykes, R. J. Creusot, T. Tüting, D. Schadendorf, M. Röcken, T. K. Eigentler, A. Molotkov, A. Mintz, S. F. Bakhoum, S. Beyaz, L. C. Cantley, P. K. Sorger, S. W. Meckelmann, A. Tasdogan, D. Liu, A. M. Laughney, B. Izar, Loss of Pip4k2c confers liver-metastatic organotropism, Nature Cancer (2024) 5:433–447 doi.org/10.1038/s43018-023-00704-x 

[123]   A. Pape, O. J. Schmitz, Dielectric barrier discharge in mass spectrometry - an overview over plasma investigations and ion sources applications, Trends in Analytical Chemistry (2024) 170:117420 https://doi.org/10.1016/j.trac.2023.117420

[122]   M. M. A. Omar, A. A. Elbashir, O. J. Schmitz, A. K. Ziyada, A. Osman, Validation of high-performance liquid chromatography coupled with LTQ orbitrap mass spectrometry for analysis of acrylamide, Journal of Food Measurement and Characterization, doi.org/10.1007/s11694-023-02223-w

[121]   A. Mallik, L. Montero, J. Roesler, S. Meckelmann, O. J. Schmitz, Surface-modification of silica with beta-alanine derivative for unique applications in liquid chromatography, ACS Applied Materials & Interfaces (2023) 15(46):54176-54184, doi.org/10.1021/acsami.3c11932

[120]   L. Mondello, P. Dugo, P. Donato, M. Herrero, L. Montero, Oliver J. Schmitz, Comprehensive two-dimensional liquid chromatography, Nature Reviews Methods Primers (2023) 3:86, doi.org/10.1038/s43586-023-00269-0

[118]   A. K. Mallik, L. Montero, S. W. Meckelmann, O. J. Schmitz, Design of -Alanine-Derived Novel C18 Stationary Phase Containing Embedded Urea and Amide Groups for the Separation of Versatile Analytes, Analytical Chemistry (2023) 95:6172–6181

[117]   J. Lu, X. Hiong, M. Ma, B. Chen, Y. Chen, O. J. Schmitz, Enhancing the compatibility of normal-phase chromatography x reversed−phase chromatography by combination of low−temperature sensitive aqueous-phase compatible normal- phase chromatography and at−column dilution modulation, Journal of Chromatography A (2023) 1691:463821

[116]   L. Montero, J. F. Ayala-Cabrera, F. F. Bristy, O. J. Schmitz, Multi-²D LC × LC as a Novel and Powerful Implement for the Maximum Separation of Complex Samples, Analytical Chemistry (2023) 95:3398-3405

[115]   J. F. Ayala-Cabrera, L. Montero, S. W. Meckelmann, F. Uteschil, O. J. Schmitz, Review on atmospheric pressure ionization sources for gas chromatography-mass spectrometry. Part I: Current ion source developments and improvements in ionization strategies, Analytica Chimica Acta (2023) 1238:340353

[114]    J. F. Ayala-Cabrera, L. Montero, S. W. Meckelmann, F. Uteschil, O. J. Schmitz, Review on atmospheric pressure ionization sources for gas chromatography-mass spectrometry. Part II: Current applications, Analytica Chimica Acta (2023) 1238:340379 

[113]   D. Maehler, S. Hoefgen, U. Münchberg, O. J. Schmitz, J. Rautschek, Y. Huang, E. Freier, V. Valiante, Time-resolved multiparameter analytics on a cell-free production platform for acyl-CoA precursors, Analytical Science Advances (2022) 3:289-296

[112]   L. Kuschmierz, M. Meyer, C. Bräsen, J. Wingender, O. J. Schmitz, B. Siebers, Exopolysaccharide composition and size in Sulfolobus acidocaldarius biofilms, Frontiers Microbiology (2022) 13:982745

[111]   V. Dosedělová, M. Laštovičková, J. F. Ayala-Cabrera, J. Dolina, Š. Konečný , O. J. Schmitz, P. Kubáň, Quantification and identification of bile acids in saliva by liquid chromatography-mass spectrometry: Possible non-invasive diagnostics of Barret´s esophagus?  Journal of Chromatography A (2022) 1676:463287

[110]   S. K. Heuser, A. LoBue, J. Li, Z. Zhuge, F. Leo, T. Suvorava, A. Olson, R. Schneckmann, D. D. Guimaraes Braga, T. Srivrastava, L. Montero, O. J. Schmitz, J. P. Schmitt, M. Grandoch, E. Weitzberg, J. O. Lundberg, J. Pernow, M. Kelm, M. Carlström, M. M. Cortese-Krott, Downregulation of eNOS and preserved endothelial function in endothelial-specific arginase 1-deficient mice, Nitric Oxide (2022), doi.org/10.1016/j.niox.2022.06.004

[109]   Y. Großmann, U. Schreiber, C. Mayer, O. J. Schmitz, Aliphatic aldehydes in the Earth’s crust – remains of prebiotic chemistry? Life (2022) 12: 925; https://doi.org/10.3390/life12070925

[108]   J. F. Ayala-Cabrera, J. Turkowski, F. Uteschil, O. J. Schmitz, Development of a tube plasma ion source for gas chromatography-mass spectrometry analysis and comparison with other atmospheric pressure ionization techniques, Analytical Chemistry (2022) 94:9595-9602

[107]   T. Koehler, J. Wingender, M. Lueling, S. W. Meckelmann, U. Telgheder, O. J. Schmitz, Characterization of the extracellular volatile metabolome of Pseudomonas aeruginosa applying an in vitro biofilm model under cystic fibrosis-like conditions, Frontiers in Bioscience – Landmark (2022), 27:156

[106]   A. R. Ziefuß, T. Hupfeld, S. W. Meckelmann, M. Meyer, O. J. Schmitz, W. Kaziur-Cegla, L. K. Tintrop, T. Schmidt, B. Gökce, S. Barcikowski, Ultrafast cold-brewing of coffee by picosecond-pulsed laser extraction, npj Science of Food (2022) 16:19; 10.1038/s41538-022-00134-6 

[105]   L. Montero, S. Meckelmann, H. Kim, J. F. Ayala-Cabrera, O. J. Schmitz, Differentiation of the cannabinoid and phenolic compounds of industrial hemp varieties by LC×LC-HRMS, Analytical and Bioanalytical Chemistry (2022); https://doi.org/10.1007/s00216-022-03925-8

[104]   M. Meyer, L. Montero, S. W. Meckelmann, O. J. Schmitz, Comparative study for analysis of carbohydrates in biological samples, Analytical and Bioanalytical Chemistry (2021) doi.org/10.1007/s00216-021-03845-z

[103]   K. Tötsch, J. Fjeldsted, S. Stow, O. J. Schmitz, S. W. Meckelmann, Effect of Sampling Rate and Data Pretreatment for targeted and non-targeted Analysis by means of Liquid Chromatography coupled to Drift Time Ion Mobility Quadruple Time-Of-Flight Mass Spectrometry, Journal of the American Society for Mass Spectrometry (2021) 32(10):2592-2603 

[102]   T. T. Bui, T. H. Nguyen, H. A. Duong, H. V. Pham, O. J. Schmitz, V. T. Nguyen, Q. A. Ngo, Hepatoprotective effect of water extract formulation from Stixis suaveolens and Pandanus tonkinensis against liver injury induced by acetaminophen and in vitro CCl4-induced toxicity, Vietnam Journal of Chemistry (2021) 59(6):836-845, doi: 10/1002/vjch.202100054

[101]   D. Brecht, F. Uteschil, O. J. Schmitz, Development of an inverse-low-temperature plasma ionization source for LC-MS, Rapid Communication in Mass Spectrometry (2021) 34:e8845

[100]   F. E. O. Suliman, S. K. Al Burtomani, A. A. Elbashir, O. J. Schmitz, Capillary electrophoresis and molecular modeling of the chiral separation of aromatic amino acids using α/β‐cyclodextrin and 18‐crown‐6, Electrophoresis (2021) 42(17):1800-1809

[99]    J. F. Ayala-Cabrera, C. Lipok, J. Li, E. Moyano,  O. J. Schmitz, F. J. Santos, Ionic Liquid Stationary Phase for Improving Comprehensive Two-dimensional Gas Chromatographic Separation of Polychlorinated Naphthalenes, Journal of Chromatography A (2021) 1635: 461732-461737

[98]   J. F. Ayala-Cabrera, C. Lipok, E. Moyano, O. J. Schmitz, F. J. Santos, Atmospheric Pressure Ionization for Gas Chromatography-High Resolution Mass Spectrometry Determination of Polychlorinated Naphthalenes,
Chemosphere (2021) 263:127963-127973

[97]   P. Rusch, A. V. Hirner, O. Schmitz, R. Kimmig, O. Hoffmann, M. Diel, Zinc distribution within breast cancer tissue of different intrinsic subtypes, Archives of Gynecology and Obstetrics (2021) 303:195–205(2021)

[96]   L. Montero, O. J. Schmitz, S. W. Meckelmann, Chemical Characterization of eight Herbal Liqueurs by means of Liquid Chromatography Coupled with Ion Mobility Quadrupole Time-of-Flight Mass Spectrometry, Journal of Chromatography A (2020) 1631:461560-461571

[95]   C. Lipok, F. Uteschil, O. J. Schmitz*, Development of an atmospheric pressure chemical ionization interface for GC-MS, Molecules (2020) 25:3253-3265

[94]    J. Li, C. Rumancev, H. V. Lutze, T. C. Schmidt, A. Rosenhahn, O. J. Schmitz*, Effect of ozone stress on the intracellular metabolites from Cobetia marina, Analytical and Bioanalytical Chemistry (2020) 412:5853-5861

[93]   S. Hellhake, S. W. Meckelmann, M. T. Empl, K. Rentmeister, W. Wißdorf, P. Steinberg, O. J. Schmitz, T. Benter, N. H. Schebb, Non-targeted and targeted analysis of oxylipins in combination with charge switch derivatization by ion mobility high resolution mass spectrometry, Analytical and Bioanalytical Chemistry (2020) 412:5743-5757

[92]   D. Brecht, F. Uteschil, O. J. Schmitz* Development of a fast-switching dual (ESI/APCI) ionization source for liquid chromatography mass spectrometry, Rapid Communication in Mass Spectrometry (2020) 34 (17):e8845

[91]   B. Peng, D. Kopczynski, B. Pratt, C. Ejsing, B. Burla, M. Hermansson, P. Benke, S. Tan, M. Chan, F. Torta, D. Schwudke, S. Meckelmann, C. Coman, O. J. Schmitz, B. MacLean, M.-C. Manke, O. Borst, M. Wenk, N. Hoffmann R. Ahrends LipidCreator workbench to probe the lipidomic landscape, Nature Communications (2020) 11:2057-2070

[90]   T. Koehler, I. Ackermann, D. Brecht, F. Uteschil, J. Wingender, U. Telgheder, O. J. Schmitz* Analysis of volatile metabolites from in vitro biofilms of Pseudomonas aeruginosa with thin-film microextraction by thermal desorption gas chromatography-mass spectrometry, Analytical and Bioanalytical Chemistry (2020) 412:2881–2892

[89]   Y. Chen, L. Montero, J. Luo, J. Li, O. J. Schmitz* Application of the new at-column dilution (ACD) modulator for the two-dimensional RPxHILIC analysis of Buddleja davidii, Analytical and Bioanalytical Chemistry (2020) 412:1483–1495 (open access)

[88]   Q. A. Ngo, D. T. Hoang, T. Duc, H. A. Duong, O. J. Schmitz, H. V. Pham Characterization of volatile components from Ethyl acetate extract of Stixis suaveolens (Roxb.) by comprehensive two-dimensional gas chromatography hyphenated with a time-of-flight mass spectrometer, Vietnam Journal of Chemistry (2020) 58:261-266

[87]   Y. Chen, L. Montero, O. J. Schmitz* Advance in on-line two-dimensional liquid chromatography modulation technology, Trends in Analytical Chemistry (2019) 120:115647

[86]   Y. Chen, J. Li, O. J. Schmitz* Development of an at-column dilution modulator for flexible and precise control of dilution factors to overcome mobile phase incompatibility in comprehensive two-dimensional liquid chromatography, Analytical Chemistry (2019) 91:10251-10257

[85]   A. Doell, O. J. Schmitz, M. Hollmann Shedding light into the subcutis – A mass spec based immuno-capture assay enables full characterization of therapeutic antibodies after injection in-vivo, Analytical Chemistry (2019) 91: 9490-9499

[84]   C. Hellmann, O. J. Schmitz* How to deal with mercury in sediments? A critical review about used methods for the speciation of mercury in sediments, Chromatographia (2019) 82: 125-141

[83]   D. Brecht, F. Uteschil, O. J. Schmitz* Thermogravimetry coupled to an atmospheric pressure photo ionization quadrupole mass spectrometry for the product control of pharmaceutical formulations and the analysis of plasticizers in polymers, Talanta (2019) 198:440-446

[82]   C. Koch, M. Nachev, J. Klein, D. Koester, O. J. Schmitz, T. Schmidt, B. Sures Degradation of the polymeric brominated flame retardant "Polymeric FR" by heat and UV, Environmental Science & Technology (2019) 53:1453-1462

[81]   S. Brüggen, O. J. Schmitz* A new concept for regulatory water monitoring via high-performance liquid chromatography coupled to high-resolution mass spectrometry, Journal of Analysis and Testing (2018) 2:342-351

[80]   K. Jooß, S. W. Meckelmann, J. Klein, O. J. Schmitz, C. Neusüß Capillary zone electrophoresis coupled to drift tube ion mobility-mass spectrometry for the analysis of native and APTS-labeled N-glycans, Analytical and Bioanalytical Chemistry (Paper in Forefront, org/10.1007/s00216-018-1515-7)

[79]   L. C. Weiss, B. Albada, S. M. Becker, S. W. Meckelmann, J. Klein, M. Meyer, O. J. Schmitz, U. Sommer, M. Leo, J.  Zagermann, N. Metzler-Nolte, R. Tollrian The scent of predation: Identification of an aquatic infochemical – the Chaoborus kairomone, Nature Chemical Biology (2018) 14:1133-1139

[78]   V. Hinnekamp, J. Klein, S. Meckelmann, P. Balsaa, T. Schmidt, O. J. Schmitz* Comparison of CCS Values Determined by Traveling Wave Ion Mobility Mass Spectrometry and Drift Tube Ion Mobility Mass Spectrometry, Analytical Chemistry (2018) 90:12042-12050

[77]   C. Mayer, U. Schreiber, M. J. Dávila, O. J. Schmitz, A. Bronja, M. Meyer, J. Klein, S. W. Meckelmann Molecular Evolution in a Peptide-Vesicle System, Life (2018) 8: 16 (open access)

[76]   C. Lipok, J. Hippler, O. J. Schmitz* A four dimensional separation method based on continuous heart-cutting gas chromatography with ion mobility and high resolution mass spectrometry, Journal of Chromatography A (2018) 1536:50-57

[75]   S. Horst, O. J. Schmitz* Quantitative analysis of bisphenol A in recycled paper with a novel Direct Inlet Probe – Atmospheric Pressure Photoionization-IonTrap-MS, Journal of Analysis and Testing (2017) 1:255-263 (open access)

[74]   A. A. Deeb, S. Stephan, O. J. Schmitz, T. C. Schmidt Suspect screening of micropollutants and their transformation products in advanced wastewater treatment, Science of the Total Environment (2017) 601-602:1247-1253

[73]   P. Weyrauch, A. V. Zaytsev, S. Stephan, L. Kocks, O. J. Schmitz, B. T. Golding, R. U. Meckenstock Conversion of cis-2-carboxycyclohexylacetyl-CoA in the downstream pathway of anaerobic naphthalene degradation, Environmental Microbiology (2017) 19:2819-2830

[72]   U. Schreiber, C. Mayer, O. J. Schmitz, P. Rosendahl, A. Bronja, M. Greule, F. Keppler, I. Mulder, T. Sattler, H. F. Schöler Organic compounds in fluid inclusions of Archean quartz – archives of prebiotic chemistry on early Earth, PLoS ONE 12(6): e0177570

[71]   H. Y. Aboul-Enein, A. A. Elbashir, O. J. Schmitz Application of capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C4D): an update, Biomedical Chromatography (2017) e3945 (DOI 10.1002/bmc.3945)

[70]   S. Stephan, J. Hippler, T. Köhler, D. Brecht, O. J. Schmitz^* A powerful four-dimensional separation method for complex samples, Journal of Analysis and Testing (2017) 1:1-9 (open access)

[69]   A. Abu awwad, T. Arafat, O. J. Schmitz* Study the Influence of Licorice and Pomegranate Drinks on Nicotine Metabolism in Human Urine, Journal of Pharmaceutical and Biomedical Analysis 132 (2017) 60-65

[68]   M. M. A. Omar, A. A. Elbashir , O. J. Schmitz* Capillary Electrophoresis Method with UV-detection for Analysis of Free Amino Acids concentrations in Food, Food Chemistry (2017) 214:300-307