![]() ![]() ![]() The stability of derivatized amines was found to be variable with oxidatively labile derivatives rapidly degrading. Further, with the use of accurate mass, charge state, and retention time, identification of unknown amines is facilitated. 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. Upon collision induced dissociation (CID) in a quadrupole collision cell, all derivatized compounds lose the aminoquinoline tag. Complex mixtures of these amine derivatives can be fractionated and quantified using liquid chromatography–electrospray ionization-mass spectrometry (LC–ESI-MS). Primary and secondary amines, including amino acids, biogenic amines, hormones, neurotransmitters, and plant siderophores, are readily derivatized with 6-aminoquinolyl- N-hydroxysuccinimidyl carbamate using easily performed experimental methodology. ![]()
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