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

Table 3

Experimental results for cobalt (II) in the 0 hours irradiated (Original Sample), 6 and 12 hours solar UV irradiated (SoUV Sample), and 6 hours artificial UV irradiated (UV Sample).

	Cobalt
	Control	SoUV		UV
	0 hrs	6 hrs	12 hrs	6 hrs
Concentration (𝜇gL^−1)	0.00	0.00	0.00	0.33±0.02
Recovery rate (%)	45.00±0.24	65.00±0.14	72.00±0.08	86.50±17
Blank recovery rate (%)	102.34±0.43