Figure 5: (A) Interference by other metals (Au, Fe, Co, Zn, Ni, and Pt) in a 0.1M H3PO4 electrolyte solution with 152.5 V amplitude, 50 Hz frequency, 0.035 V increment potential, -1.2 V initial potential, and 250 sec accumulation time. (B) The application to mice ordure was dissolved in nitrate. In the first peak, the 0.2 ml dissolved solution was spiked, then 1 mg/L lead standard was spiked three times.