Alonso-Lomillo MA, Gonzalo-Ruiz J, Domínguez-Renedo O, Muñoz FJ, Arcos-Martínez MJ. CYP450 biosensors based on gold chips for antiepileptic drugs determination.
Biosens Bioelectron 2008;
23:1733-7. [PMID:
18339535 DOI:
10.1016/j.bios.2008.01.030]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Revised: 12/17/2007] [Accepted: 01/29/2008] [Indexed: 10/22/2022]
Abstract
Three-electrode configuration chips containing a Pt, Au and a screen-printed Ag/AgCl as counter, working and reference electrode, respectively, have been developed. Selective determination of Phenobarbital (PB) has been carried out by Cytochrome P450 2B4 (CYP450) immobilization into a polypyrrole matrix onto the gold working electrode. Chronoamperometric experiments show a PB diffusion coefficient of 2.42x10(-6)cm(2)s(-1), a reproducibility and repeatability in terms of residual standard deviation (RSD) of 13% and 5.51%, respectively, and a limit of detection (LOD) of 0.289 micromol dm(-3) (alpha=beta=0.05) for the developed CYP450-biosensor chip. Its performance has been showed by the determination of PB in pharmaceutical drugs. HPLC has been used as reference technique.
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