Figure 4.
Three types of electrodes being used to perform the experiment: (a) commercial Ag/AgCl electrodes; (b) pencil lead powder-type electrodes; and (c) pencil lead solid-type electrodes.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.