期刊
ELECTROANALYSIS
卷 24, 期 5, 页码 1100-1108出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201200070
关键词
Adrenocorticotropin; Cortisol; Electrochemical immunosensor; Phenyl boronic acid
资金
- Spanish Ministerio de Ciencia e Innovacin [DPS 2008-07005-C02-01, CTQ 2009-12650, CTQ 2009-09351]
- Comunidad de Madrid [S2009/PPQ-1642]
A novel dual electrochemical immunosensor for the multiplexed determination of adrenocorticotropin (ACTH) and cortisol is reported. Aminophenylboronic acid-modified dual screen-printed carbon electrodes were prepared on which the corresponding ACTH and cortisol antibodies were immobilized. Competitive immunoassays involved biotinylated ACTH and alkaline phosphatase labelled streptavidin, or alkaline phosphatase labelled cortisol. Differential pulse voltammetry upon 1-naphtyl phosphate addition was employed to monitor the affinity reactions. The ranges of linearity were 5.0X10-5-0.1 and 0.1-500 ng/mL for ACTH and cortisol. The usefulness of the dual immunosensor was demonstrated by analyzing certified human serum samples with good recoveries.
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