Determination of Catecholamines and Indoleamines in Human Urine Based on Intramolecular Excimer-forming Derivatization and Fluorescence Detection
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A liquid chromatographic (LC) determination of catecholamines and indoleamines is described. This is based on intramolecular excimer-forming fluorescence derivatization with 4-(1-pyrene)butanoyl chloride, followed by reversed-phase LC. The analytes, containing an amino moiety and phenolic hydroxyl moieties in a molecule, were converted to the corresponding polypyrene-labeled derivatives by one-step derivatization. They afforded intramolecular excimer fluorescence, which can clearly be discriminated from the normal fluorescence emitted from reagent blanks. The detection limits (<i>S/N</i> = 3) for catecholamines and indoleamines were femto-mole levels per 20-µL injection. Furthermore, this method was applied to a urine assay.
- Analytical Sciences
Analytical Sciences 23(4), 485-488, 2007-04-10
The Japan Society for Analytical Chemistry