Post-column derivatization for capillary electrophoresis using naphthalene-2,3-dicarboxaldehyde and 2-mercaptoethanol
A reagent consisting of naphthalene-2,3-dicarboxaldehyde and 2-mercaptoethanol has been investigated for post-column derivatization of amines with a gap-based reactor developed for capillary electrophoresis and laser-induced fluorescence detection. Separation and detection of a wide range of compounds has been demonstrated including neuropeptides, catecholamines, amino acids and proteins. Compounds derivatized with this reagent have been detected by laser-induced fluorescence using excitation with the He-Cd laser (442 nm line) and could also be detected using an Ar ion laser (458 nm line). Mass detection limits obtained with this reagent and post-column derivatization for glycine and transferrin are 330 and 13 mol, respectively. Sensitive detection of lysine has also been demonstrated with this reagent. Electropherograms for homogenate samples of a snail brain and for single mammalian cells have been obtained using post-column derivatization with this reagent and laser-induced fluorescence detection.
Publication Source (Journal or Book title)
Analytical methods & instrumentation
Gilman, S., & Ewing, A. (1995). Post-column derivatization for capillary electrophoresis using naphthalene-2,3-dicarboxaldehyde and 2-mercaptoethanol. Analytical methods & instrumentation, 2 (3), 133-141. Retrieved from https://repository.lsu.edu/chemistry_pubs/457