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

<table>UV-Vis spectra for (a) blank, (b) 6-hour<i> UV Sample</i>, (c) 12-hour<i> SoUV Sample</i>, (d) 6-hour<i> SoUV Sample</i>, (e) 10 ppm humic acid, (f) 2-fold diluted<i> Original Sample</i>, and (g)<i> Original Sample.</i></table>

Advances in Chemistry

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Figure 5

Figure 5: Solar UV-Assisted Pretreatment of River Water Samples for the Voltammetric Monitoring of Nickel and Cobalt Ultratraces 