Highly sensitive determination of capsaicin using a carbon paste electrode modified with amino-functionalized mesoporous silica.
Colloids Surf B Biointerfaces
; 95: 90-5, 2012 Jun 15.
Article
en En
| MEDLINE
| ID: mdl-22417405
ABSTRACT
Mesoporous silica (MS) and amino-functionalized mesoporous silica (NH(2)-FMS) were prepared and characterized using the techniques of transmission electron microscopy (TEM) and nitrogen adsorption-desorption. Voltammetry was used to investigate the electrochemical behavior of capsaicin at the amino-functionalized mesoporous silica, which was modified through carbon paste electrode (NH(2)-FMS/CPE). NH(2)-FMS/CPE showed better performance for the electrochemical oxidation of capsaicin, when compared with bare carbon paste electrode (CPE) and mesoporous silica modified carbon paste electrode (MS/CPE). We optimized the experimental conditions influencing the determination of capsaicin. Under optimal conditions, the oxidation peak current was proportional to capsaicin concentration in the range of 0.040-0.40 µmol L(-1)and 0.40-4.0 µmol L(-1), when the detection limit was 0.020 µmol L(-1) (S/N=3). The above method was successfully applied to determine capsaicin in hot pepper samples, yielding satisfactory results. The spiked recoveries were in the range of 93.1-100.7%.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Carbono
/
Capsaicina
/
Dióxido de Silicio
/
Aminas
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Colloids Surf B Biointerfaces
Asunto de la revista:
QUIMICA
Año:
2012
Tipo del documento:
Article