Laser induced fluorescence and photochemical derivatization for trace determination of camptothecin.
Talanta
; 83(1): 256-61, 2010 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-21035672
ABSTRACT
Laser-excited fluorescence was used for the selective determination of camptothecin in samples containing anti-cancer camptothecin-analogs (irinotecan and topotecan). The selectivity of the method was based on the UV photochemical derivatization in basic solution which increased the analyte fluorescence (337/450 nm) and eliminated fluorescence from the two campthotecin-analogs. The influence of UV exposure time and sodium hydroxide concentration was studied using an experimental design. Limit of detection was 4 × 10(-10) mol L(-1) with linear fluorescence response up to 1 × 10(-6)mol L(-1). Average recoveries of camptothecin (added to the samples to simulate a contamination) were 92 ± 4 and 94 ± 6% (n=3) respectively in irinotecan and topotecan based pharmaceuticals.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Camptotecina
/
Preparações Farmacêuticas
/
Antineoplásicos Fitogênicos
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Idioma:
En
Revista:
Talanta
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil