Determination of Zn (II) on fast-scan anodic stripping voltammetric

Abstract In this study, the amalgam zinc film on glassy carbon electrode was obtained in situ deposition; it was used to study the determination of Zn (II). Exceptional sensitivity of the determination was demonstrated using fast scan (v < 1 KV/s) anodic stripping voltammetry. The scan rate of 500 V/s was chosen for subsequent determination. In this condition, the calibration curve of Zn (II) was obtained. The concentration of Zn (II) and the peak current showed a good linear relationship from 1×10⁻ ⁷ mg / mL to 1×10⁻ ¹¹ mg / mL for Zn (II). The detection limit attained for Zn (II) was estimated up to 3.33×10⁻ ¹² mg / mL. In addition, Zn (II) was spiked and determined in samples of deionized water. The recovery values for these experiments were between 105.1% and 93.7%, and their relative standard deviation was 3.9%-6.2%. We demonstrate that the proposed method has potential for practical application in analyses of wastewaters and seawaters due to its good anti-interference ability.