Development of an In-Field Method for the Detection of Barium in Various Water Samples Using Differential Pulse Anodic Stripping Voltammetry

Figure 1

Investigation of three different electrodes; top (a) bare gold (conditioned), second top (b) bare bismuth (conditioned), third top (c) glassy carbon (preconditioning), and last (d) glassy carbon (postconditioning). Voltammetric parameters: differential pulse, 10 μg/L Ba, 0.02 M KCl electrolyte with 5mg/L Hg (0.0015M HNO₃), = 30 sec, dp= -2500 mV, 100 mV/s.

(a)

(b)

(c)

(d)