Abstract
A glassy carbon electrode was modified with gold hierarchical dendrites (Au HDs) by one-step electrodeposition in the presence of cytosine, which plays an important role in the formation of the Au HDs. This approach is simple, fast, feasible, controllable, without any seed, template, or surfactant. The modified electrodes were used for the simultaneous determination of Pb2+ and Cu2+ by square wave stripping voltammetry. The peak currents show good linear relationship with concentrations of Pb2+ and Cu2+ in the range of 5.0 to 15.0 μM. The recoveries of the spiked water samples are in the range of 94.0 %–107.4 % for Pb2+ and Cu2+, and their relative standard deviation are in the range of 2.7 %–4.3 % for Pb2+ and Cu2+, respectively (n = 3).
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