Sub-ppt detection limits for copper ions with Gly-Gly-His modified electrodesElectronic supplementary information (ESI) available: mass spectra and Table S1. See http://www.rsc.org/suppdata/cc/b1/b106730n/
Abstract
An electrochemical metal ion sensor has been developed with a detection limit of less than 0.2 ppt by the covalent attachment of the tripeptide Gly-Gly-His as a recognition element to a 3-mercaptopropionic acid modified gold electrode.