Application of Differential Pulse Anodic Stripping Voltammetry with a Stopped-FIow System for the Simultaneous Determination of Pb, Cu, Sb, and Bi in Environmental Samples

Abstract

Cu(II), Sb(III), Bi(III) and Pb(II) were cathodically deposited to a hanging mercury drop electrode (HMDE) from a 1.0 M HCl medium in a flow cell followed by quantification by differential pulse anodic stripping voltammetry (DPASV) in a malonic acid / HCl stripping medium. Well-defined peaks were observed and peak separation of ΔE_p > 80 mV was achieved for the four metals. This method has been applied successfully to the analysis of environmental water samples. Recovery of 100±7 % was obtained at 10⁻⁸ -10⁻⁹ M levels and detection limits were at the level of 10⁻¹⁰ M.

¹ Current Address: Mail Stop F-17, Centers for Disease Control and Prevention, 4770 Buford Hwy, N.E. Atlanta, GA 30341

Key Words:

• Differential Pulse Anodic Stripping
• Flow Cell
• Cu
• Sb
• Bi
• Pb

Notes

¹ Current Address: Mail Stop F-17, Centers for Disease Control and Prevention, 4770 Buford Hwy, N.E. Atlanta, GA 30341