A fluorimetric, column-switching HPLC and its application to an elimination study of LLU-alpha enantiomers in rat plasma.
Biomed Chromatogr
; 15(2): 95-9, 2001 Apr.
Article
en En
| MEDLINE
| ID: mdl-11268049
A method for the enantiomeric determination of 2,7,8-trimethyl-2-(beta-carboxyethyl)-6-hydroxy chroman (LLU-alpha, gamma-CEHC) in rat plasma was developed using high-performance liquid chromatography (HPLC) with a fluorimetric derivatization with 4-N, N-dimethylaminosulfonyl-7-piperazino-2,1,3-benzoxadiazole (DBD-PZ) followed by O-acetylation with acetyl chloride. The proposed HPLC system used two non-chiral columns (phenyl and octadecylsilica) and a chiral column (a modified cellulose type), which were connected via two column-switching valves. A derivatized sample prepared from rat plasma was first separated on the phenyl column, and the fraction including LLU-alpha derivative was introduced to the octadecylsilica column to quantify the concentration of the mixture of S- and R-LLU-alpha. Finally, the LLU-alpha derivative was directly injected into the chiral column to obtain the ratio of the enantiomers. The proposed HPLC system was applied to the enantiomeric determination of LLU-alpha in plasma after intravenous administration of racemic LLU-alpha. S-LLU-alpha was eliminated faster than R-LLU-alpha, and its concentration in plasma decreased to one-third at 2 min after dosing.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Propionatos
/
Cromanos
/
Cromatografía Líquida de Alta Presión
Límite:
Animals
Idioma:
En
Revista:
Biomed Chromatogr
Año:
2001
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Reino Unido