Determination of abscisic acid by capillary electrophoresis with laser-induced fluorescence detection.
J Chromatogr A
; 1021(1-2): 209-13, 2003 Dec 22.
Article
en En
| MEDLINE
| ID: mdl-14735990
ABSTRACT
A novel method based on capillary electrophoresis coupled to laser-induced fluorescence detection (CE-LIF) was developed for the determination of abscisic acid (ABA), which is an essential phytohormone during plant growth and development. ABA was labeled with 8-aminopyrene-1,3,6-trisulfonate via reductive amination in presence of acetic acid and sodium cyanoborohydride. The derivatization yield was maximized by optimizing several derivatization parameters including derivatization reagent concentration, reaction temperature and time. The conjugate was separated and quantitated by CE-LIF. The linearity of ABA was determined in the range from 0.1 to 10 micromol l(-1) with a correlation of 0.9979. The derivatization limit of detection for ABA was found to be 56 fmol (corresponding to the concentration of 2.8 x 10(-8) mol l(-1)). The detection limit for ABA was 5.5 amol for an injection volume of 5 nl. As a preliminary application, the proposed method was successfully applied to determining trace amount of ABA in the crude extracts of tobacco without extra purification and enrichment procedure and showed a better selectivity and sensitivity than those conventional methods used in determination of ABA.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Espectrometría de Fluorescencia
/
Ácido Abscísico
/
Electroforesis Capilar
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J Chromatogr A
Año:
2003
Tipo del documento:
Article
Pais de publicación:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS