“…2,3 According to the World Health Organization (WHO), the United States Environmental Protection Agency (US-EPA) and the Environment National Council from Brazil (CONAMA) the tolerable levels of Pb 2+ in surface water are 10, 15 and 30 μg L −1 , respectively. 4 In this context, an efficient water monitoring employing a fast, accurate and precise method is critical to warn environmental agencies regarding potential polluting activities. However, in general, analytical methods for quantification of these contaminants are time-consuming and require expensive, laborious techniques, and highly qualified professionals.…”