Energy & Environmental
Manufacturing / Chemicals
Other Technologies
View All
Game Design at DDS 2012
Technologies Home

For Registration

File Last modified on: Wed Nov 18, 2020 22:50:34

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

Indian patent application no. 1089/MUM/2011

Inventors: C P Rao, Amitabha Acharya