Please use this identifier to cite or link to this item: https://cris.library.msu.ac.zw//handle/11408/1180
Title: Horseradish peroxidase biosensor to detect zinc ions in aqueous solutions.
Authors: Moyo, Mambo
Keywords: Horseradish peroxidase, maize tassel, multiwalled carbon nanotubes, metal biosensor, Zn2+.
Issue Date: 2014
Series/Report no.: Open Journal of Applied Biosensor;Vol.3 ; p1-7
Abstract: Maize tassel-multiwalled carbon nanotube (MT-MWCNT) composite has been used as a matrix for physical adsorption of horseradish peroxidase (HRP) onto the surface of a glassy carbon electrode through electrostatic interactions. The HRP/MT-MWCNT biosensor was applied for the detection of Zn2+ in aqueous solution. The biosensor designed was able to determine Zn2+ in the range of 0.35 -12 mg/L with a detection limit of 7.5 pg/L. The inhibition was found to be reversible and uncompetitive when data were modeled using the Dixon and Cornish-Bowden plots. The biosensor was found to have good repeatability, reproducibility and high selectivity. The developed biosensor can be used to detect other HRP inhibiting trace metal ions.
URI: http://hdl.handle.net/11408/1180
Appears in Collections:Research Papers

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