Analysis of soy isoflavone plasma levels using HPLC with coulometric detection in postmenopausal women.
J Pharm Biomed Anal
; 53(3): 682-7, 2010 Nov 02.
Article
en En
| MEDLINE
| ID: mdl-20580512
ABSTRACT
A reliable chromatographic method for the determination of soy isoflavones (genistein, daidzein and glycitein) using a coulometric detection has been developed and applied to analyse plasma of postmenopausal women. The chromatographic separation was performed on a C18 reversed phase column with a mobile phase composed of acetonitrile-phosphate buffer mixture. Coulometric detection was carried out at +0.500 V. A careful and rapid solid phase extraction procedure on hydrophilic/lipophilic cartridges was chosen for plasma sample purification with and without hydrolysis obtaining good extraction yield values for all the analytes (>90.0%). The enzymatic hydrolysis step was necessary for the determination of the total amount of soy isoflavones. The limit of quantitation was 0.5 ng mL(-1) for genistein and 0.25 ng mL(-1) for daidzein and glycitein. The method was found to be precise and accurate. Thus, the proposed method is suitable for the analysis of soy isoflavones (free and total amounts) in plasma of postmenopausal women under treatment with the SoymenGN dietary supplement.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Cromatografía Líquida de Alta Presión
/
Posmenopausia
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Genisteína
/
Isoflavonas
Tipo de estudio:
Diagnostic_studies
Límite:
Female
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Humans
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Middle aged
Idioma:
En
Revista:
J Pharm Biomed Anal
Año:
2010
Tipo del documento:
Article
País de afiliación:
Italia