We constructed a sensor for the determination of Fe2+ and/or Fe3+ ions that consists of a polyaniline layer as an ion-to-electron transducer; on top of it, chelating molecules are deposited (which can selectively chelate specific ions) and protected with a non-biofouling poly(2-methyl-2-oxazoline)s layer. We have shown that our potentiometric sensing layers show a rapid response to the presence of Fe2+ or Fe3+ ions, do not experience interference with other ions (such as Cu2+), and work in a biological environment in the presence of bovine serum albumin (as a model serum protein). The sensing layers detect iron ions in the concentration range from 5 nM to 50 µM.

• Keywords
• analysis, non-biofouling layer, poly(2-methyl-2-oxazoline)s, potentiometry, sensor of Fe2+ or Fe3+ ions,
• MeSH
• Aniline Compounds MeSH
• Chelating Agents * MeSH
• Electrodes MeSH
• Ion-Selective Electrodes * MeSH
• Ions MeSH
• Hydrogen-Ion Concentration MeSH
• Publication type
• Journal Article MeSH
• Names of Substances
• Aniline Compounds MeSH
• Chelating Agents * MeSH
• Ions MeSH
• polyaniline MeSH Browser