Patil, M. Study on Quality of Soil: Part-II. Simultaneous Determination of Cu, Pb, Cd, and Zn in Soil Samples of Bhusawal Area by Square Wave Voltammetry, Differential Pulse Polarographic and Differential Pulse-Anodic Stripping Voltammetry: Study on Quality of Soil: Part-II. Simultaneous Determination of Cu, Pb, Cd, and Zn in Soil Samples of Bhusawal Area by Square Wave Voltammetry, Differential Pulse Polarographic and Differential Pulse-Anodic Stripping Voltammetry. ijpba 2018, 9.