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  • Erwin R Kaal, Arend H. J. Kolk, Sjoukje Kuijper, H A Janssen
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2009 (First Published: 1 August 2009)
  • A fast gas chromatography-mass spectrometry (GC-MS) method with minimum sample preparation is described for early diagnosis of tuberculosis (TB). The automated procedure is based on the injection ofContinue Reading
  • Leon Coulier, Erwin R Kaal, M. L. Tienstra, Th Hankemeier
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2005
  • Direct analysis of polymers containing polymeric hindered amine light stabilizers (HALS) by using pyrolysis coupled to GC-MS is applied successfully for fast and straightforward identification ofContinue Reading
  • Jelle De Vos, Erwin R Kaal, Remco Swart, Martyna Baca, Yvan Vander Heyden, Sebastiaan Eeltink
  • Chemistry, Medicine
  • Journal of separation science
  • 2016 (First Published: 1 February 2016)
  • The selectivity and separation efficiency of aqueous size-exclusion chromatographic separations of intact proteins were assessed for different flow rates, using columns packed with 3 and 5 μm silicaContinue Reading
  • Sonja Peters, Erwin R Kaal, Iwan Horsting, H A Janssen
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2012 (First Published: 1 February 2012)
  • A new method is presented for the analysis of phenolic acids in plasma based on ion-pairing 'Micro-extraction in packed sorbent' (MEPS) coupled on-line to in-liner derivatisation-gasContinue Reading
  • Leon Coulier, Erwin R Kaal, Th Hankemeier
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2005 (First Published: 1 April 2005)
  • Size exclusion chromatography (SEC), gradient polymer elution chromatography (GPEC) and liquid chromatography at critical conditions (LC-CC) have been developed and applied to observe chemicalContinue Reading
  • Sjaak de Koning, Erwin R Kaal, H A Janssen, Chris J van Platerink, Udo A. T. Brinkman
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2008 (First Published: 1 April 2008)
  • The feasibility of a versatile system for multi-step direct thermal desorption (DTD) coupled to comprehensive gas chromatography (GC x GC) with time-of-flight mass spectrometric (TOF-MS) detection isContinue Reading
  • Erwin R Kaal, Sjaak de Koning, Stella Brudin, H A Janssen
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2008 (First Published: 1 August 2008)
  • Pyrolysis-gas chromatography (Py-GC) is a powerful tool for the detailed compositional analysis of polymers. A major problem of Py-GC is that polar (bio)polymers yield polar pyrolyzates which are notContinue Reading
  • Erwin R Kaal, Geert Alkema, Mitsuhiro Kurano, Margit Geissler, H A Janssen
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2007 (First Published: 1 March 2007)
  • On-line coupled size exclusion chromatography-pyrolysis gas chromatography mass spectrometry (SEC-Py-GC-MS) is studied as a novel tool for the characterization of complex polymer samples. AnContinue Reading
  • Erwin R Kaal, Mitsuhiro Kurano, Margit Geissler, H A Janssen
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 2008 (First Published: 1 April 2008)
  • A recently developed hyphenated system for "organic" size-exclusion chromatography-pyrolysis-gas chromatography-mass spectrometry (SEC-Py-GC-MS) is adapted to allow the use of aqueous LC eluents asContinue Reading