Figure 7.
Current response for Pb2+ and Cd2+ at concentrations of 200 and 5 ppb, respectively, by fresh and 75 days aged at room temperature GP_naf_ex_Bi electrode. Conditions: pH 4.5, pulse height 75 mV, step 2 mV and frequency 2 Hz.
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.