Optimization of the SPME parameters and its online coupling with HPLC for the analysis of tricyclic antidepressants in plasma samples.
J Chromatogr Sci
; 44(6): 340-6, 2006 Jul.
Article
en En
| MEDLINE
| ID: mdl-16884589
ABSTRACT
Solid-phase microextraction (SPME)-liquid chromatography (LC) is used to analyze tricyclic antidepressant drugs desipramine, imipramine, nortriptyline, amitriptyline, and clomipramine (internal standard) in plasma samples. Extraction conditions are optimized using a 2(3) factorial design plus a central point to evaluate the influence of the time, temperature, and matrix pH. A Polydimethylsiloxane-divinylbenzene (60-mum film thickness) fiber is selected after the assessment of different types of coating. The chromatographic separation is realized using a C(18) column (150 x 4.6 mm, 5-microm particles), ammonium acetate buffer (0.05 mol/L, pH 5.50)-acetonitrile (5545 v/v) with 0.1% of triethylamine as mobile phase and UV-vis detection at 214 nm. Among the factorial design conditions evaluated, the best results are obtained at a pH 11.0, temperature of 30 degrees C, and extraction time of 45 min. The proposed method, using a lab-made SPME-LC interface, allowed the determination of tricyclic antidepressants in in plasma at therapeutic concentration levels.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Cromatografía Líquida de Alta Presión
/
Dibenzazepinas
/
Microextracción en Fase Sólida
/
Antidepresivos Tricíclicos
Límite:
Humans
Idioma:
En
Revista:
J Chromatogr Sci
Año:
2006
Tipo del documento:
Article
País de afiliación:
Brasil