Solar UV-Assisted Pretreatment of River Water Samples for the Voltammetric Monitoring of Nickel and Cobalt Ultratraces

Figure 1

Voltammograms of nickel (II) and cobalt (II) for (a) Original Sample, (b) 6-hour SoUV Sample, (c) 12-hour SoUV Sample, and (d) UV Sample measured in the presence of ammonia buffer (NH₃/NH₄Cl, pH = 9.5) as a supporting electrolyte and DMG-TEA as complexing agents. The standard concentrations were 5, 10, and 15 μgL⁻¹ for nickel (II) and 1, 2, and 3 μgL⁻¹ for cobalt (II).

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