Methods and Instruments
LC-MS und GC-MS-Kopplung zur Detektion, Strukturaufklärung und Quantifizierung von Metaboliten
I. LC-MS
1. LC-ESI-QqQ-Massenspektrometrie (Agilent 6460) |
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2. LC-ESI/APCI-Ionenmobilitäts-Massenspektrometrie (Waters Synapt HDMS) |
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3. LC-ESI-Orbitrap-Massenspektrometrie (Thermo Scientific LTQ Orbitrap XL) |
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II. GC-MS
As a routine method we are profiling relative concentration changes in primary metabolites (sugars, sugar-alcohols, amino acids, organic acids and phosphorylated compounds). The mainly polar metabolites are extracted from the tissue, derivatised and the derivates are identified with an Agilent GC-Quadrupole-MS System, which can operate in EI and CI mode.
Several more targeted methods for analysing particular (also non-polar) compounds are developed in cooperation with the various users.
1. GC-EI/CI-Massenspektrometrie (Agilent 7890A/5975C) |
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Fig.1: Example Chromatogram for a GC-MS primary metabolite profiling in Physcomitrella patens
Fig.2: Example for a cluster analysis for the relative changes of metabolite concentrations in Ricinus communis under anoxia.