Potentiometric determination of mercury ions by ion imprinted polymer coated multiwall carbon nanotube: High selective sensor for determination of trace amounts of mercury ions in biological samples

Abstract

A Hg(II) ion imprinted polymer was synthesized and coated on multiwall carbon nanotube. This material was used for modification of a carbon paste electrode. The electrode was used for determination of trace amounts of mercury (II) ions in aqueous media. The electrode composition was graphite powder 66%, paraffin 24% and IIP@MWCNTs 11% (W/W). The linear range for mercury (II) was 8.0×10-8 to 3.5×10-3 mol L"1 and the limit of detection was obtained 6.3×10"8 mol L"1. The response time and lifetime of the electrode were improved by coating of IIP on MWCNTs surface. The Method validation was performed by analyzing of some standard reference materials.