Under the optimum experimental conditions, the electroche-
mical performance of the DPASV for the determination of nickel
using paper-based devices coupled with electrochemical detection
on screen-printed carbon electrode was studied. A 50 mL of
solution was dropped on the hydrophilic area of paper-based
device. Peak potential of nickel was obtained in potential region
between −0.20 and −0.10 V (versus Ag/AgCl).