alexa Progress and possible applications of miniaturised separation techniques and elemental mass spectrometry for quantitative, heteroatom-tagged proteomics.
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Prfrock D

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Abstract The application of miniaturised separation techniques such as capillary LC, nano LC or capillary electrophoresis offers a number of advantages in terms of analytical performance, solvent consumption and the ability to analyse very small sample amounts. These features make them attractive for various bioanalytical tasks, in particular those related to the analysis of proteins and peptides. The skillful combination of such techniques with inductively coupled plasma mass spectrometry (ICP-MS) has recently permitted the design of combined analytical approaches utilising either elemental or molecule-specific detection techniques such as electrospray ionisation (ESI) or matrix-assisted laser desorption/ionisation (MALDI) mass spectrometry in a highly complementary manner for, as an example, proteomics-orientated research (heteroatom-tagged proteomics). Such hybrid approaches are, in particular, providing promising new options for the fast screening of complex samples for specific metal-containing or--more generally speaking--heteroatom-containing biomolecules, as well as the accurate absolute quantification of biomolecules, which is still an unsolved problem in bioanalysis. Here, progress in as well as the potential and the special requirements of hyphenating miniaturised separation techniques with ICP-MS are reviewed and critically discussed. In addition, selected applications are highlighted to indicate current and possible future trends within this emerging area of research. This article was published in Anal Bioanal Chem and referenced in Journal of Analytical & Bioanalytical Techniques

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