Measuring hydrogen peroxide due to water radiolysis using a modified horseradish peroxidase based biosensor as an alternative dosimetry method.
Bioelectrochemistry
; 104: 79-84, 2015 Aug.
Article
en En
| MEDLINE
| ID: mdl-25880374
H2O2 generated during water radiolysis was measured electrochemically as an alternative dosimetry method. A biosensor was fabricated by immobilising modified horseradish peroxidase (HRP) on a glassy carbon electrode (GCE) followed by evaluation of its analytical parameters. Anthraquinone 2-carboxylic acid was used to modify HRP. To assess sensor performance, phosphate buffer solutions were irradiated with 0.510 Gy of gamma ray emitted from (60)Co. The results showed that this sensor can detect low quantities of hydrogen peroxide in water radiolysis. Sensitivity, detection limit and linear range of the biosensor were 260 nA/Gy, 0.392 Gy and 0.5-5 Gy, respectively. Long term stability studies showed that sensor responses were stable for at least a month. The cathodic peak current, as biosensor response, subsequently decreased to 20% of its initial value.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Radiometría
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Agua
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Técnicas Biosensibles
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Peroxidasa de Rábano Silvestre
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Peróxido de Hidrógeno
Idioma:
En
Revista:
Bioelectrochemistry
Asunto de la revista:
BIOQUIMICA
Año:
2015
Tipo del documento:
Article
Pais de publicación:
Países Bajos