Koen Sandra is the editor of “Biopharmaceutical Perspectives”. He is CEO at RIC group and visiting professor at Ghent University. He is also a member of LCGC Europe’s editorial advisory board.
Polysorbate Analysis in Biopharmaceutical Applications—A Snapshot of the Analytical Toolbox
An overview of different approaches for the qualitative and quantitative analysis of polysorbates.
Separation Science: The State of the Art: On the Contemporary Analysis of Protein Biopharmaceuticals
December 1st 2022In this extended special feature to celebrate the 35th anniversary edition of LCGC Europe, key opinion leaders from the separation science community explore contemporary trends in separation science and identify possible future developments.
The structural complexity of monoclonal antibodies (mAbs) challenges the capabilities of even the most advanced chromatography and mass spectrometry techniques. This study examines the use of micro-pillar array columns in combination with mass spectrometry for peptide mapping of both mAbs and antibody–drug conjugates (ADCs).
Monoclonal antibodies are becoming a core aspect of the pharmaceutical industry. Together with a huge therapeutic potential, these molecules come with a structural complexity that drives state-of-the-art chromatography and mass spectrometry (MS) to its limits. This article discusses the use of micro-pillar array columns in combination with mass spectrometry for peptide mapping of monoclonal antibodies (mAbs) and antibodyÐdrug conjugates (ADCs). Micro-pillar array columns are produced by a lithographic etching process creating a perfectly ordered separation bed on a silicon chip. As a result of the order existing in these columns, peak dispersion is minimized and highly efficient peptide maps are generated, providing enormous structural detail. Using examples from the author’s laboratory, the performance of these columns is illustrated.
In the 21st century, numerous advances have been made in liquid chromatography (LC) column technology. The best known are columns packed with sub-2-µm porous particles or sub-3-µm superficially particles, and monolithic columns. Another very novel and original development is micro-pillar array columns (µPAC). µPACs are produced by a lithographic etching process to create a perfectly ordered separation bed on a silicon chip. Although the performance in terms of efficiency has been illustrated, the applicability for analysis of real complex samples has yet to be fully demonstrated. This article illustrates that state‑of‑the‑art µPAC columns coated with octadecyl are applicable for a challenging application such as lipidomics. The performance is illustrated with the analysis of human blood plasma lipids.
Contemporary Trends in Biopharmaceutical Analysis
May 1st 2017The HPLC symposium series is recognized as “the forum” where new developments in liquid phase separations and their hyphenation to mass spectrometry (MS) for the analysis of (bio)pharmaceutical compounds and their metabolites are presented.
Characterizing Monoclonal Antibodies and Antibody–Drug Conjugates Using 2D-LC–MS
March 1st 2017Two-dimensional liquid chromatography (2D-LC) has in recent years seen an enormous evolution, and with the introduction of commercial instrumentation, the technique is no longer considered a specialist tool. One of the fields where 2D-LC is being widely adopted is in the analysis of biopharmaceuticals, including monoclonal antibodies (mAbs) and antibody–drug conjugates (ADCs). These molecules come with a structural complexity that drives state-of-the-art chromatography and mass spectrometry (MS) to its limits. Using practical examples from the authors’ laboratory complemented with background literature, the possibilities of on-line 2D-LC for the characterization of mAbs and ADCs are presented and discussed.
On-Line Two-Dimensional Liquid Chromatography (2D-LC) for the Analysis of Pharmaceuticals
November 1st 2016On-line two-dimensional liquid chromatography (2D-LC) embracing mainly comprehensive LC (LC×LC) and multiple heart-cutting LC (mLC–LC) offers new opportunities for in-depth characterization of pharmaceuticals. Reversed-phase LC × reversed-phase LC using different column chemistries and mobile phases provides good orthogonality for a wide range of applications related to small molecule drugs. Moreover, hardware configurations and software are now commercially available to perform LC×LC and mLC–LC measurements in a reproducible manner.
Determination of Sweeteners, Preservatives, and Caffeine in Food
Analysis of additives such as sweeteners, preservatives, and caffeine in various food products, beverages, and consumer toothpaste using the Agilent 1290 Infinity II LC.
Determination of Sweeteners, Preservatives, and Caffeine in Food
Analysis of additives such as sweeteners, preservatives, and caffeine in various food products, beverages, and consumer toothpaste using the Agilent 1290 Infinity II LC.
HPLC to UHPLC Transfer of USP Method for Amlodipine Besylate
This Application Note describes the method transfer of a USP HPLC method for amlodipine besylate tablets to a UHPLC method using the Agilent 1290 Infinity II LC.