铜精矿中铅锌的连续测定  

Sequential Determination of Lead and Zinc in Copper Concentrate by Polarography

作　　者：王建琴[1] 王劲榕[1] 

机构地区：[1]昆明冶金研究院分析室,云南昆明650031

出　　处：《岩矿测试》2000年第4期295-297,共3页Rock and Mineral Analysis

摘　　要：利用铜铁试剂分离Cu、Fe等干扰元素 ,同时铜铁试剂与Pb和Zn产生络合物吸附波 ,可连续测定铜精矿中的Pb和Zn。体系中铅峰在 - 0 .54V ,锌峰在 - 0 .99V。线性范围Pb为 80～ 1 60 0 μg/L ,Zn为 1 2 0～ 1 2 0 0 μg/L。检出限Pb为 40 μg/L ,Zn为 80 μg/L。测定结果与参考值相符 ,RSD(n =3)Pb <6% ,Zn <1 0 %。A method for the sequential determination of lead and zinc in copper concentrate by polarography is reported in this paper. Cupferron is used to eliminate the interference from Fe and Cu and cupferron also produces complex adsorption waves with Pb and Zn at -0.54 V and -0.99 V respectively. The detection limits are 40 μg/L and 80 μg/L with linear ranges of 80～1?600 μg/L and 120～1?200?μg/L for Pb and Zn respectively. The method has been applied to the determination of Pb and Zn in geological standard reference materials. The results are in agreement with reference values with precision of < 6% RSD for Pb ( n =3) and <10% RSD ( n =3) for Zn.

关 键 词：极谱法 铜铁试剂 铅 锌 铜精矿 峰电位 铜 铁 

分 类 号：P575.4[天文地球—矿物学] O657.14[天文地球—地质学]