高镉锌精矿中锌镉的测定  

Determination of Zinc and Cadmium in HighCadmium Zinc Concentrate

作　　者：王劲榕[1] 陈加希[1] 王英[1] 

机构地区：[1]昆明冶金研究院,云南昆明650031

出　　处：《云南冶金》2003年第5期46-47,54,共3页Yunnan Metallurgy

摘　　要：样品分解后,干扰元素用氨分离,向滤液中加入一定量过量的EDTA标准溶液,使Zn2+、Cd2+全部与EDTA络合并过量,用Zn2+盐返滴过量的EDTA,测出Zn、Cd合理,用KI置换出EDTA-Cd中的EDTA,并用Zn2+盐滴定,测得Cd含量,从Zn、Cd合量中减去Cd量即得Zn量。Zn、Cd的加入回收率均在99%以上,本法分析快速准确。After decomposition of the sample,the influential is separated with ammonia;Adding excessive standard solution of EDTA into the solution,Zn2+ and Cd2+ are combined with EDTA to form complex;back titration for the excessive EDTA with Zn2+ salt to determine the content of Zn and Cd,followed by replace EDTA is EDTACd with KI,the titration for the replacl EDTA with Zn+ salt determine the centen of Cd.the Zn content is determined by deducing Cd content from the amount content of Zn and Cd.This analytical method features quick and accurate,the adding recovery of both Zn and Cd are over 99%.

关 键 词：高镉锌精矿 锌 镉 测定 滴定分析 

分 类 号：TF813[冶金工程—有色金属冶金] O655.2[理学—分析化学]