Rapid detection of nivalenol and deoxynivalenol in wheat using surface plasmon resonance immunoassay.
Anal Chim Acta
; 673(2): 173-8, 2010 Jul 19.
Article
em En
| MEDLINE
| ID: mdl-20599032
A surface plasmon resonance (SPR) immunoassay using a monoclonal antibody was developed to measure nivalenol (NIV) and deoxynivalenol (DON) contamination in wheat. A highly sensitive and stable DON-immobilized sensor chip was prepared, and an SPR detection procedure was developed. The competitive inhibition assay used a monoclonal antibody that cross-reacts with NIV and DON. The half maximal inhibitory concentration (IC(50)) values of the SPR assay were 28.8 and 14.9 ng mL(-1) for NIV and DON, respectively. The combined responses of NIV and DON in wheat were obtained using a simultaneous detection assay in a one-step cleanup procedure. NIV and DON were separated using a commercial DON-specific immunoaffinity column (IAC) and their responses were obtained using an independent detection assay. Spiked tests using these toxins revealed that recoveries were in the range 91.5-107% with good relative standard deviations (RSDs) (0.40-4.1%) and that detection limits were 0.1 and 0.05 mg kg(-1) for NIV and DON, respectively. The independent detection using IAC showed detection limits of 0.2 and 0.1 mg kg(-1) for NIV and DON, respectively. SPR analysis results were correlated with those obtained using a conventional LC/MS/MS method for wheat co-contaminated with NIV and DON. These results suggested that the developed SPR assay is a practical method to rapidly screen the NIV and DON co-contamination of wheat and one of a very few immunoassays to detect NIV directly.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tricotecenos
/
Imunoensaio
/
Ressonância de Plasmônio de Superfície
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
Anal Chim Acta
Ano de publicação:
2010
Tipo de documento:
Article
País de publicação:
Holanda