This page lists our publications sorted by date. 


  • An approach to high throughput measurement of accurate retention data in liquid chromatography, D.R. Stoll, G. Kainz, T.A. Dahlseid, T.J. Kempen, T. Brau, B.W.J. Pirok, Chromatogr. A, 1678, 2022, 463350, DOI: 10.1016/j.chroma.2022.463350
  • Combining photodegradation in a liquid-core-waveguide cell with multiple-heart-cut two-dimensional liquid chromatography, M.J. den Uijl, J.H.L. van der Wijst, I. Groeneveld, P.J. Schoenmakers, B.W.J. Pirok, M.R. van Bommel, Chem. 2022, DOI: 10.1021/acs.analchem.2c01928 [OPEN ACCESS]
  • Creating a common ground for professional development of university chemistry (STEM) lecturers in Europe, N. Brouwer, I. Maciejowska, C. McDonnell, M.E. Niemelä, B.W.J. Pirok, S. Grecea, C. Femoni, J. Ortiz-Bustos, W. Byers, I. Wasser, Education Policy, Management and Quality, 14(1), 2022, 45-57, DOI: 10.48127/spvk-epmq/22.14.45 [OPEN ACCESS]
  • Recycling gradient-elution liquid chromatography for the analysis of chemical-composition distributions of polymers, L.E. Niezen, B.B.P. Staal, C. Lang, H.J.A. Philipsen, B.W.J. Pirok, G.W. Somsen, P.J. Schoenmakers, Chromatogr. A, 2022, DOI: 10.1016/j.chroma.2022.463386 [OPEN ACCESS]
  • Assessing the feasibility of stationary-phase-assisted modulation for two-dimensional liquid chromatography separations, J. den Uijl, T. Roeland, T.S. Bos, P.J. Schoenmakers, M.R. van Bommel, B.W.J. Pirok, J. Chromatogr. A, 2022, DOI: 10.1016/j.chroma.2022.463388 [OPEN ACCESS]
  • Characterization and comparison of smokeless powders by on-line two-dimensional liquid chromatography, S. van den Hurk, N. Abdulhussain, A.S.A. van Beurden, M.E. Dekker, A. Hulsbergen, R.A.H. Peters, B.W.J. Pirok, A.C. van Asten, J. Chromatogr. A, 1672, 2022, 463072, DOI: 10.1016/j.chroma.2022.463072 [OPEN ACCESS]
  • The development of a generic analysis method for natural and synthetic dyes by ultra-high-pressure liquid chromatography with photo-diode-array detection and triethylamine as an ion-pairing agent, I. Groeneveld, B.W.J. Pirok, S.R.A. Molenaar, P.J. Schoenmakers, M.R. van Bommel, Chromatogr. A, 1673, 2022, 463038, DOI: 10.1016/j.chroma.2022.463038 [OPEN ACCESS]
  • Expansion of the application range of pyrolysis-gas chromatography to copolymer sequence determination: acrylate copolymers, W.C. Knol, S. Vos, T. Gruendling, B.W.J. Pirok, R.A.H. Peters, 2022, Journal of Pyrolysis, DOI: 10.1016/j.jaap.2022.105578 [OPEN ACCESS]
  • Co-Polymer sequence determination over the molar mass distribution by size-exclusion chromatography combined with pyrolysis – gas chromatography, W.C. Knol, T. Gruendling, P.J. Schoenmakers, B.W.J. Pirok, R.A.H. Peters, Chromatogr. A, 2022, 1670, 462973, DOI: 10.1016/j.chroma.2022.462973 [OPEN ACCESS]
  • Investigation of factors affecting the accuracy of retention model parameters obtained from retention data in reversed-phase liquid chromatography, T. Brau, B.W.J. Pirok, S.C. Rutan, D.R. Stoll, J. Sep. Sci., 2022, DOI: 10.1002/jssc.202100911
  • Automated feature-mining for two-dimensional liquid chromatography applied to polymers enabled by mass remainder analysis, S.R.A. Molenaar, B. van de Put, J.S. Desport, S. Samanipour, R.A.H. Peters, B.W.J. Pirok, Anal. Chem., 2022, 94, 5599-5607, DOI: 10.1021/acs.analchem.1c05336 [OPEN ACCESS]
  • Improving retention-time prediction in supercritical-fluid chromatography by multivariate modelling, S.R.A. Molenaar, M.V. Savova, R. Cross, P.D. Ferguson, P.J. Schoenmakers, B.W.J. Pirok, J. Chromatogr. A, 2022, 1668, 462909, DOI: 10.1016/j.chroma.2022.462909 [OPEN ACCESS]
  • Critical comparison of background correction algorithms used in chromatography, L.E. Niezen, P.J. Schoenmakers, B.W.J. Pirok, Anal. Chim. Acta, 2022, 1201, 339605, DOI: 10.1016/j.aca.2022.339605 [OPEN ACCESS]


  • From Centroided to Profile Mode: Machine Learning for Prediction of Peak Width in HRMS Data, S. Samanipour; P. Choi; J. O’Brien; B.W.J. Pirok; M. Reid; K. Thomas, Anal. Chem., 2021, 49, 16562-16570, DOI: 10.1021/acs.analchem.1c03755 [OPEN ACCESS]
  • Bayesian Optimization of Comprehensive Two-dimensional Liquid Chromatography Separations, J. Boelrijk, B.W.J. Pirok, B. Ensing, P. Forré, J. Chromatogr. A, 2021, 1659, 462628, DOI: 10.1016/j.chroma.2021.462628 [OPEN ACCESS]
  • Comparing different light-degradation approaches for the degradation of crystal violet and eosin Y, M.J. den Uijl, A. Lokker, B. van Dooren, P.J. Schoenmakers, B.W.J. Pirok, M.R. van Bommel, Dyes and Pigments, 197, 2021, 109882, DOI: 10.1016/j.dyepig.2021.109882 [OPEN ACCESS]
  • Thermal modulation to enhance two-dimensional liquid chromatography separations of polymers, L.E. Niezen, B.B.P. Staal, C. Lang, B.W.J. Pirok, P.J. Schoenmakers, J. Chromatogr. A, 2021, 1653, 462429, DOI: 10.1016/j.chroma.2021.462429 [OPEN ACCESS]
  • A comprehensive two-dimensional liquid chromatography method for the simultaneous separation of lipid species and their oxidation products, E. Lazaridi, H. Janssen, J. Vincken, B.W.J. Pirok, M. Hennebelle, J. Chromatogr. A, 2021, 1644, 462106, DOI: 10.1016/j.chroma.2021.462106 [OPEN ACCESS]
  • Peak-tracking algorithm for use in comprehensive two-dimensional liquid chromatography – application to monoclonal-antibody peptides, S.R.A. Molenaar, T.A. Dahlseid, G. Leme, D.R. Stoll, P.J. Schoenmakers, B.W.J. Pirok, J. Chromatogr. A, 2021, 1639, 461922, DOI: 10.1016/j.chroma.2021.461922 [OPEN ACCESS]
  • Measuring and using scanning-gradient data for use in method optimization for liquid chromatography M.J. den Uijl, P.J. Schoenmakers, G.K. Schulte, D.R. Stoll, M.R. van Bommel, B.W.J. Pirok, J. Chromatogr. A, 2021, 1636, 461780, DOI: 10.1016/j.chroma.2020.461780 [OPEN ACCESS]
  • Reducing the influence of geometry-induced gradient deformation in liquid chromatographic retention modelling, T.S. Bos, L.E. Niezen, M.J. den Uijl, S.R.A. Molenaar, S. Lege, P.J. Schoenmakers, G.W. Somsen, B.W.J. Pirok, J. Chromatogr. A, 2021, 1635, 461714, DOI: 10.1016/j.chroma.2020.461714 [OPEN ACCESS]1659


  • Accurate modelling of the retention behaviour of peptides in gradient-elution hydrophilic interaction liquid chromatography
    L.S. Roca, S.E. Schoemaker, B.W.J. Pirok, A.F.G. Gargano, P.J. Schoenmakers, J. Chromatogr. A, 1614, 2020, 460650, DOI: 10.1016/j.chroma.2019.460650 [OPEN ACCESS]
  • Recent applications of chemometrics in one- and two-dimensional chromatography
    T.S. Bos, W.C. Knol, S.R.A. Molenaar, L.E. Niezen, P.J. Schoenmakers, G.W. Somsen, B.W.J. Pirok, J. Sep. Sci. 43(9-10), 2020, 1678-1727, DOI: 10.1002/jssc.202000011 [OPEN ACCESS]
  • Challenges in Obtaining Relevant Information from One- and Two-Dimensional LC Experiments
    B.W.J. Pirok & J.A. Westerhuis, LC-GC North America, 6(38), 2020, 8-14, [LINK] [OPEN ACCESS]
  • Parallel gradients in comprehensive multidimensional liquid chromatography enhance utilization of the separation space and the degree of orthogonality when the separation mechanisms are correlated
    A.A. Aly, M. Muller, A. de Villiers, B.W.J. Pirok, T. Górecki, J. Chromatogr. A, 1628, 2020, 461452, DOI: 10.1016/j.chroma.2020.461452 [OPEN ACCESS]
  • Book Chapter: Liquid Chromatography: Applications for the Oil and Gas Industry
    D. van Herwerden, B.W.J. Pirok, P.J. Schoenmakers, Analytical Techniques in the Oil and Gas Industry for Environmental Monitoring, 2020, DOI: 10.1002/9781119523314.ch5
  • Retention applications of retention modelling in liquid chromatography
    M.J. den Uijl, P.J. Schoenmakers, B.W.J. Pirok, M.R. van Bommel, J. Sep. Sci. 44(1), 2020, 88-114, DOI: 10.1002/jssc.202000905 [OPEN ACCESS]
  • Detection challenges in quantitative polymer analysis by liquid chromatography
    W.C. Knol, B.W.J. Pirok, R.A.H. Peters, J. Sep. Sci. 44(1), 2020, 63-87, DOI: 10.1002/jssc.202000768 [OPEN ACCESS]


  • Mapping Degradation Pathways of Natural and Synthetic Dyes with LC-MS: Influence of Solvent on Degradation Mechanisms
    B.W.J. Pirok, G. Moro, N. Meekel, S.V.J. Berbers, P.J. Schoenmakers and M.R. van Bommel, J. Cult. Heritage, 38, 2019, 29-36, DOI: 10.1016/j.culher.2019.01.003 
  • Recent Developments in Two-Dimensional Liquid Chromatography: Fundamental Improvements for Practical Applications
    B.W.J. Pirok, D.R. Stoll and P.J. Schoenmakers, Anal. Chem., 2019, 91(1), 240-263, DOI: 10.1021/acs.analchem.8b04841 [OPEN ACCESS]
  • Making Incompatible Approaches Compatible (MANIAC)
    B.W.J. Pirok, 2019, ISBN: 9789463752817, Faculty of Science (FNWI), University of Amsterdam. [LINK] [OPEN ACCESS]
  • On-line Microfluidic Immobilized-Enzyme Reactors: A New Tool for Characterizing Synthetic Polymers
    B. Wouters, B.W.J. Pirok, D. Soulis, R.C. Garmendia Perticarini, S. Fokker, R.S. van den Hurk, M. Skolimowski, R.A.H. Peters and Peter J. Schoenmakers, Anal. Chim. Acta., 2019, 1053, 62-69, DOI: 10.1016/j.aca.2018.12.002 [OPEN ACCESS]
  • Heterogeneity analysis of polymeric carboxylic acid functionality by selective derivatization followed by size exclusion chromatography
    T. Brooijmans, R.A. Okhuijsen, G.M.M. Oerlemans, B.W.J. Pirok, P.J. Schoenmakers, R.A.H. Peters, Anal. Chim. Acta, 1072, 2019, 87-94, DOI: 10.1016/j.aca.2019.04.051
  • Computer-aided gradient optimization of hydrophilic interaction liquid chromatographic separations of intact proteins and protein glycoforms
    G. van Schaick, B.W.J. Pirok, R. Haselberg, G.W Somsen, A.F.G Gargano, J. Chromatogr. A, 1598, 2019, 67-76, DOI: 10.1016/j.chroma.2019.03.038 [OPEN ACCESS]
  • Perspectives on the Future of Multi-dimensional Platforms
    G. Groeneveld, B.W.J. Pirok and P.J. Schoenmakers, Faraday Discuss., 218, 2019, 72-100, DOI: 10.1039/C8FD00233A
  • Clinical Metabolomics: Expanding the Metabolome Coverage Using Advanced Analytical Techniques
    R. Haselberg, I. Kohler, B.W.J. Pirok, A.F.G. Gargano, LC-GC Europe, 37(12), 2019, 878-887, [LINK] [OPEN ACCESS]
  • Characterization of Dye Extracts from Historical Cultural-Heritage Objects using State-of-the-Art Comprehensive Two-Dimensional Liquid Chromatography and Mass Spectrometry with Active Modulation and Optimized Shifting Gradients
    B.W.J. Pirok, M.J. den Uijl, G. Moro, S.V.J. Berbers, C.J.M. Croes, M.R. van Bommel and P.J. Schoenmakers, Anal. Chem., 91(4) 2019, 3062-3069, DOI: 10.1021/acs.analchem.8b05469 [OPEN ACCESS]
  • Analysis of Charged Acrylic Particles by On-line Comprehensive Two-Dimensional Liquid Chromatography and Automated Data-Processing
    B.W.J. Pirok, N. Abdulhussain, T. Brooijmans, T. Nabuurs, J. de Bont, M.A.J. Schellekens, R.A.H. Peters and P.J. Schoenmakers, Anal. Chim. Acta., 2019, 1054, 184-192, DOI: 10.1016/j.aca.2018.12.059 [OPEN ACCESS]


  • Peak-Tracking Algorithm for Use in Automated Interpretive Method-Development Tools in Liquid Chromatography
    B.W.J. Pirok, S.R.A. Molenaar, L.S. Roca and P.J. Schoenmakers, Anal. Chem., 2018, 90(23), 14011-14019, DOI: 10.1021/acs.analchem.8b03929 [OPEN ACCESS]
  • Comprehensive Two-Dimensional Liquid Chromatography of Heavy Oil
    F.T. van Beek, R. Edam, B.W.J. Pirok, W.J.L. Genuit and P.J. Schoenmakers, J. Chromatogr. A, 2018, 1564, 110-119. DOI: 10.1016/j.chroma.2018.06.001 [OPEN ACCESS]
  • Practical Approaches for Overcoming the Challenges of Comprehensive Two-Dimensional Liquid Chromatography
    B.W.J. Pirok and Peter J. Schoenmakers, LC-GC Europe, 2018, 31, 242–249 [LINK] [OPEN ACCESS]
  • Optimizing separations in online comprehensive two-dimensional liquid chromatography
    B.W.J. Pirok, A.F.G. Gargano and P.J. Schoenmakers, J. Sep. Sci., 2018, 41(1), 68–98, DOI: 10.1002/jssc.201700863 [OPEN ACCESS]

Recent Posts

Characterisation of Smokeless Powders in Explosives by 2D-LC

CAST member Rick van den Hurk developed an analytical method to simultaneously characterize smokeless powders on their molecular weight distribution and additive profile. The data generated from this 2D-LC method yields high evidential value for explosives analysis and enables forensic differentiation with high discriminating power.

VENI Grant for Bob Pirok

The Dutch Research Council has awarded Bob Pirok a 280k€ VENI grant entitled Unleashing the Potential of Separation Technology to Achieve Innovation in Research and Society (UPSTAIRS).