Solar UV Photooxidation as Pretreatment for Stripping Voltammetric Trace Metal Analysis in River Water

Figure 8

UV-VIS spectra of (a) 0.1 mg/L humic acid, (b) 1 mg/L humic acid, (c) Warnow river sample 1 : 1000 diluted, and (d) Warnow river sample 1 : 100 diluted.