Determination of isopropylmethylphenols in black seed oil by differential pulse voltammetry.
Phytochem Anal
; 15(5): 320-4, 2004.
Article
en En
| MEDLINE
| ID: mdl-15508837
A differential pulse voltammetric method is presented for the determination of isopropylmethylphenols (carvacrol and/or thymol) in phytotherapeutic black seed oils. The voltammetric behaviours of these phenols were examined in various buffer systems over the pH range 3.5-10.0. In Sörensen buffered methanol solution (3:7; v:v; pH 8.5), the differential pulse voltammograms exhibited reproducible peaks at Ep + 0.49 V vs. silver-silver chloride-potassium chloride 3 M for both carvacrol and thymol. Under these conditions, a plot of peak height against concentration of the isopropylmethylphenols was found to be linear over the range 0.25-2.5 microg/mL (r = 0.999). The detection limit was 0.04 microg/mL. The described voltammetric method was tested on two black seed oils available on the Austrian market.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Timol
/
Aceites de Plantas
/
Nigella sativa
/
Monoterpenos
Idioma:
En
Revista:
Phytochem Anal
Asunto de la revista:
BOTANICA
/
QUIMICA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Austria
Pais de publicación:
Reino Unido