Amperometric immunosensor for nonylphenol determination based on peroxidase indicating reaction. Biosens Bioelectron

ArticleinBiosensors & Bioelectronics 22(1):56-62 · August 2006with15 Reads
Impact Factor: 6.41 · DOI: 10.1016/j.bios.2005.11.025 · Source: PubMed

    Abstract

    Novel immunosensor for nonylphenol (NP) determination has been developed by immobilization of specific antibodies together with horseradish peroxidase on the surface of carbon screen-printed electrode. The signal of the immunosensor is generated by the involvement of NP accumulated in the peroxidase oxidation of mediator (Methylene Blue, hydroquinone or iodide). This results in the increase of the signal recorded by linear-sweep voltammetry. The sensitivity of the detection depends on the nature of mediator, its concentration and incubation period. Cross-selectivity of the response toward readily oxidized phenolic compounds has been determined. The immunosensor developed makes it possible to detect from 20 microgL(-1) to 44 mgL(-1) of NP with detection limit 10 microgL(-1) of NP.