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

摘要

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 8.0x10~(-8) to 3.5x10~(-3)mol L~(-1) and the limit of detection was obtained 6.3x10~(-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.