Abstract：A method for the determination of lead in the solution from Zn NH3 NH4Cl H2O leaching system which is used for smelting Zn by ammonia leaching. It is found that it can increase method sensitivity when ammonium chloride is added in substrate solutiom in oscillopolarographic determination of lead. Detection limit can be reduced from micro level to trace level. It is confirmed experimentally that the optimal composition of the substrate solution is 0.6 mol/L hydrochloric acid, 2 mol/L ammonium chloride, 8×10-5 g/L glutin and 7.9×10-7 mol/L ascorbic acid. The detection limit is 1.0×10-5 g/L. The linear range is 348×10-5~0.64 g/L. The relative standard deviation for six parallel determinations is 3.3 %. The determination results are consistent with those by ICP AES. The method can be applied to detect low, micro and trace lead in the leaching and purifying solution from Zn- NH3-NH4Cl-H2O system which is used for smelting Zn by ammonia leaching.
李燕春;邓飞跃. 示波极谱法测定氨浸法炼锌的Zn- NH3- NH4Cl-H2O体系浸出液和净化液中铅[J]. 冶金分析, 2011, 31(2): 48-51.
LI Yan chun;DENG Fei yue. Oscillopolarographic determination of lead in the leaching and purifying solution from Zn NH3 NH4Cl H2O system of zinc smelting by ammonia leaching. , 2011, 31(2): 48-51.
