Cao LW. Determination of catecholamines and serotonin by micellar electrokinetic chromatography with laser-induced fluorescence detection.
Biomed Chromatogr 2007;
21:708-15. [PMID:
17385806 DOI:
10.1002/bmc.809]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
6-Oxy-(N-succinimidyl acetate)-9-(2'-methoxycarbonyl) fluorescein, a new synthesized fluorescent reagent, was established for the first time as a label for the sensitive analysis of catecholamines (CAs) and serotonin (5-HT) by micellar electrokinetic chromatography (MEKC) with laser-induced fluorescence detection. After careful study on the derivatization conditions such as pH value, reagent concentration, temperature and reaction time, the labeling reaction was accomplished as quickly as 7 min with stable yield. The separation parameters for the CAs and 5-HT were also optimized in detail. The derivatives were baseline separated in a running buffer containing 30 mM boric acid and 15 mM sodium dodeculsulfate at pH 9.0. The detection limits ranged from 5 x 10(-10) to 2 x 10(-9) M (signal-to-noise ratio = 3). The rapid and sensitive method was also applied to the determination of the CAs and 5-HT of urine samples.
Collapse