Abstract
Amino acids are important targets for metabolic profiling. For decades, amino acid analysis has been accomplished by either cation-exchange or reversed-phase liquid chromatography coupled to UV absorbance or fluorescence detection of pre-column or post-column-derivatized amino acids. Recent years have seen great progress in the development of direct-infusion or hyphenated mass spectrometry in the analysis of free amino acids in physiological fluids, because mass spectrometry not only matches optical detection in sensitivity, but also offers superior selectivity. The advent of cryo-probes has also brought NMR spectroscopy within the detection limits required for the analysis of free amino acids. But there is still room for further improvement, including expansion of the analyte spectrum, reduction of sample preparation and analysis time, automation, and synthesis of affordable isotope standards.
Fully automated gas chromatography-mass spectrometry analysis of amino acids.
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Acknowledgments
This work was supported by BayGene, the FUGATO-plus-MeGA-M (FKZ: 0315131F), and the intramural REFORM program.
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Kaspar, H., Dettmer, K., Gronwald, W. et al. Advances in amino acid analysis. Anal Bioanal Chem 393, 445–452 (2009). https://doi.org/10.1007/s00216-008-2421-1
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DOI: https://doi.org/10.1007/s00216-008-2421-1