Colorimetric sensing of bisulphate ion (HSO3-) by calix[4]-conjugate protected Ag-nanoparticles

This invention relates to a method of detecting the presence of bisulfite ions in a sample. A solution containing silver nanoparticles coated in a conjugate of diamine tetra sulphonato calix[4]arene changes its colour from orange yellow to bright orange red immediately in the presence of HSO3- ions

Faculty Associated


  • CP Rao, Amitabha Acharya

Patent Application no.