Double-ion imprinted polymer @magnetic nanoparticles modified screen printed carbon electrode for simultaneous analysis of cerium and gadolinium ions

作者：Prasad Bhim Bali^*; Jauhari Darshika

来源：Analytica Chimica Acta, 2015, 875: 83-91.

DOI：10.1016/j.aca.2015.02.009

• Dual ion imprinted polymer
• Screen printed carbon electrode
• Lanthanide ions
• Differential pulse anodic stripping voltammetry
• Simultaneous ultra trace analysis

A typical, reproducible, and rugged screen printed carbon electrode, modified with dual-ion imprinted beads, was fabricated employing the "surface grafting from" approach. For this, the acyl chloride functionalized magnetic nanoparticles were first immobilized and chemically attached with a typical functional monomer (but-2-enedioic acid bis-[(2-amino-ethyl)-amide]) on the electrode surface. This was subsequently subjected to the thermal polymerization in the presence of template ions (Ce(IV) and Gd(III)), cross- linker (ethylene glycol dimethacrylate), initiator (AIBN), and multiwalled carbon nanotubes. The modified sensor was used for the simultaneous analysis of both template ions in aqueous, blood serum, and waste-water samples, using differential pulse anodic stripping voltammetry which revealed two oxidation peaks for respective templates with resolution as much as 950 mV, without any cross reactivity, interferences and false-positives. The detection limits realized by the proposed sensor, under optimized conditions, were found to be as low as 0.07 ng mL(-1) for Ce(IV) and 0.19 ng mL(-1) for Gd(III) (S/N = 3) that could eventually be helpful for lanthanide estimation at stringent levels.

• 出版日期2015-5-22