期刊
ANALYTICAL CHEMISTRY
卷 83, 期 19, 页码 7523-7530出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac201610x
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资金
- Bioplatforms Australia Pty Ltd
- National Collaborative Research Infrastructure Strategy (NCRIS)
- Victorian State government
- University of Melbourne
- Australian Research Council (ARC)
- Grains Research and Development Corporation (GRDC)
- South Australian Government
- University of Adelaide
- University of Queensland
Primary and secondary amines, including amino adds, biogenic amines, hormones, neurotransmitters, and plant siderophores, are readily derivatized with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate using easily performed experimental methodology. Complex mixtures of these amine derivatives can be fractionated and quantified using liquid chromatography electrospray ionization-mass spectrometry (LC-ESI-MS). Upon collision induced dissociation (CID) in a quadrupole collision cell, all derivatized compounds lose the aminoquinoline tag. With the use of untargeted fragmentation scan functions, such as precursor ion scanning, the loss of the aminoquinoline tag (Amq) can be monitored to identify derivatized species; and the use of targeted fragmentation scans, such as multiple reaction monitoring, can be exploited to quantitate amine-containing molecules. Further, with the use of accurate mass, charge state, and retention time, identification of unknown amines is facilitated. The stability of derivatized amines was found to be variable with oxidatively labile derivatives rapidly degrading. With the inclusion of antioxidant and reducing agents, tris(2-carboxyethyl)-phosphine (TCEP) and ascorbic add, into both extraction solvents and reaction buffers, degradation was significantly decreased, allowing reproducible identification and quantification of amine compounds in large sample sets.
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