Novel Amperometric Mercury-Selective Sensor Based on Organic Chelator Ionophore.
Basant ElsebaiMariana Emilia GhicaMohammed Nooredeen AbbasChristopher M A BrettPublished in: Molecules (Basel, Switzerland) (2023)
A novel amperometric sensor for the direct determination of toxic mercury ions, Hg 2+ , based on the organic chelator ionophore N, N di (2-hydroxy-5-[(4-nitrophenyl)diazenyl]benzaldehyde) benzene-1,2-diamine (NDBD), and multiwalled carbon nanotubes (MWCNT) immobilized on a glassy carbon electrode surface was developed. The parameters influencing sensor performance including the ionophore concentration, the applied potential, and electrolyte pH were optimized. The sensor response to Hg 2+ was linear between 1-25 µM with a limit of detection of 60 nM. Interferences from other heavy metal ions were evaluated and the sensor showed excellent selectivity towards Hg 2+ . The method was successfully applied to the determination of mercury ions in milk and water samples.
Keyphrases
- aqueous solution
- carbon nanotubes
- water soluble
- heavy metals
- quantum dots
- fluorescent probe
- hydrogen peroxide
- ionic liquid
- solid phase extraction
- molecularly imprinted
- living cells
- reduced graphene oxide
- risk assessment
- staphylococcus aureus
- mass spectrometry
- climate change
- biofilm formation
- gold nanoparticles
- cystic fibrosis
- drinking water
- human health
- liquid chromatography
- loop mediated isothermal amplification