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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5924
Tipo: Artigo de Periódico
Título: Exploiting iminoquinone free radical production for thiol based drugs determination in pharmaceutical formulations
Título(s) alternativo(s): Journal of the brazilian chemical society
Autor(es): Chagas, Manoel Pinheiro
Santos, Josué Carinhanha Caldas
Santos, Eduardo B. G. N.
Oliveira, Tiago D.
Korn, Mauro
Autor(es): Chagas, Manoel Pinheiro
Santos, Josué Carinhanha Caldas
Santos, Eduardo B. G. N.
Oliveira, Tiago D.
Korn, Mauro
Abstract: A spectrophotometric flow analysis procedure to determine Captopril (CPT) and N-acetyl-L-cysteine (NAC) in pharmaceutical formulations was developed based on the reaction with iminoquinone radical produced from the N,N-dimethyl-p-phenilenediamene (DMPD) oxidation in acid medium. The reagents addition order was evaluated and analytical parameters were optimized. The linear concentrations ranges were 2.5-90 and 5.0-50 mg L-1 for CPT and NAC, respectively. Limits of detection (3σ) were calculated at 0.22 and 1.8 mg L-1 and the relative standard deviation (N = 10) were lower than 1.0 and 2.1% for CPT and NAC, respectively. The procedure was employed for CPT and NAC determination in diverse pharmaceutical formulations and by applying paired t-test the results were in agreement with those obtained by reference methods for 95% confidence level.
Palavras-chave: Iminoquinone radical reaction
Flow injection analysis
Determination of thiol drugs
Captopril
URI: http://www.repositorio.ufba.br/ri/handle/ri/5924
Data do documento: 2009
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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