Modification of a glassy carbon electrode with a composite based on colloidal silver nanoparticles stabilized by cross-linked starch derivatives for the voltammetric determination of thallium

A glassy carbon (GCE) electrode was covered with a composite prepd. by mixing the ammoniacal Ag complex with cross-linked starch derivs. and then was dried. The characteristics of the modified electrode were studied using the differential pulse voltammetry (DPASV) technique. A 0.2 M EDTA soln. was used as the base electrolyte. The modified electrode showed lower detection limits, repeatability of results and reduced measurement time, it could work over long distances, did not require long concn. times, did not wear out, was non-toxic and environmentally safe.

Automated summary

By covering a glassy carbon electrode with a composite, the electrode's performance is improved, resulting in lower detection limits, repeatability of results, and reduced measurement time.