Using platinum nanoflowers modified glassy carbon electrode for determination of Lead by anodic stripping voltammetric method
Abstract
Lead (II) was determined by anodic stripping voltammetric method using platinum nanoflowers modified glassy carbon electrode (PtNFs/GCE ). Optimal experimental conditions were found acetate buffer solution 0 .1 mol.L -1 (pH = 4.5), an preconcentration potential of -1.1 V, preconcentration time of 120 s, pulse amplitude of 60 mV and scan rate of 0.23 V.s -1 . The peak current response increased linearly with the metal concentration in a range of 1-100 µg.L -1 with R = 0.9981. The limit of detection and limit of quantity were 0.398 µg.L -1 and 1.272 µg.L -1 , respectively. The interference effects of some metal ions such as Zn, Cd, and Cu were studied. The PtNFs/GCE was applied to analysis of lead (II) in some river water, and lake water samples with results in satisfactory statistical agreement with graphite furnace atomic absorption spectroscopy (GFAAS).