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Issue 24, 2015
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Selective and sensitive determination of ochratoxin A based on a molecularly imprinted electrochemical luminescence sensor

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Abstract

This paper reports a new molecularly imprinted electrochemical luminescence (MIP-ECL) sensor for the determination of ochratoxin A (OTA) with high selectivity and sensitivity. Ru(bpy)32+ was immobilized on the electrode surface as the luminescent material by using Nafion. The process of template elution and rebinding acted as a gate to control the flux of probes, which passed through the cavities and reacted on the electrode surface. When the imprinted film was rebound with OTA, the ECL signal decreased. Under optimal conditions, the MIP-ECL sensor showed a wide linear range from 0.1 ng mL−1 to 10 ng mL−1 with a detection limit (S/N = 3) of 0.03 ng mL−1. Corn samples were assayed by using this sensor, and recoveries ranging from 95.2% to 102.7% were obtained.

Graphical abstract: Selective and sensitive determination of ochratoxin A based on a molecularly imprinted electrochemical luminescence sensor

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Publication details

The article was received on 01 Sep 2015, accepted on 26 Oct 2015 and first published on 02 Nov 2015


Article type: Paper
DOI: 10.1039/C5AY02327K
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Anal. Methods, 2015,7, 10224-10228

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    Selective and sensitive determination of ochratoxin A based on a molecularly imprinted electrochemical luminescence sensor

    Q. L. Wang, M. M. Chen, H. Q. Zhang, W. Wen, X. H. Zhang and S. F. Wang, Anal. Methods, 2015, 7, 10224
    DOI: 10.1039/C5AY02327K

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