Enantiomeric separation of verapamil and its active metabolite, norverapamil, and simultaneous quantification in human plasma by LC-ESI-MS-MS.
J Chromatogr Sci
; 50(9): 839-48, 2012 Oct.
Article
em En
| MEDLINE
| ID: mdl-22677487
ABSTRACT
A simple, selective and high-throughput liquid chromatography-tandem mass spectrometry method has been developed and validated for the chromatographic separation and quantification of (R)- and (S)-enantiomers of verapamil and its active metabolite, norverapamil, in human plasma. All four analytes along with deuterated internal standards (D(6)-verapamil and D(6)-norverapamil) were extracted from 50 µL human plasma by liquid-liquid extraction. Separation was achieved on a Chiralcel OD-RH (150 × 4.6 mm, 5 µm) analytical column with resolution factors of 1.4 and 1.9 for (R)- and (S)-enantiomers of verapamil and norverapamil, respectively. A mobile phase consisting of 0.05% trifluoroacetic acid in water-acetonitrile (7030, v/v) afforded capacity factors of 2.45, 3.05, 2.27 and 3.13 for (R)- and (S)-enantiomers of verapamil and norverapamil, respectively. Detection was carried out on a triple quadrupole mass spectrometer, operating in the multiple reaction monitoring and positive ion modes. The method was validated over the concentration range of 1.0-250.0 ng/mL for all four analytes. Absolute recovery for the analytes ranged from 91.1 to 108.1%. Matrix factors calculated at three quality control levels varied from 0.96-1.07. The method was successfully applied to a pharmacokinetic study in 18 healthy Indian males after oral administration of a 240-mg verapamil tablet formulation under fasting conditions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Verapamil
/
Cromatografia Líquida de Alta Pressão
/
Espectrometria de Massas em Tandem
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Chromatogr Sci
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Índia