容量法测定钴镍试样中锌  

Determination of Zinc in Specimen of Cobalt and Nickel by Volumetric Analysis Methods

作　　者：李蓉[1] 李啸寅[2] 郭春阳[3] 

机构地区：[1]昆明冶金研究院,云南昆明650031 [2]云南民族大学应用化学系,云南昆明650031 [3]暨南大学应用化学系,广东广州510632

出　　处：《云南冶金》2012年第3期62-64,82,共4页Yunnan Metallurgy

摘　　要：提出了在氨-氯化铵介质中用1-(2-吡啶偶氮)-2-萘酚(简称PAN)及丁二酮肟沉淀分离钴、镍,EDTA容量法测定锌的方法。分别对两种沉淀剂的用量、沉淀条件、钴、镍分离情况及分离量进行了试验研究,消除了钴、镍离子对二甲酚橙的封闭干扰作用,锌的回收率:99.90%～100.10%。已成功地应用于含钴、镍试样中EDTA滴定法测定锌含量。By precipitating cobalt and nickel in the media of ammonia-ammonia chloride with 1-（2-pyridylazo） -2-naphthol （PAN） and dimethylglyoxime, the determination method of zinc by the EDTA titrimetry was put forward. The experimental research on the dosage, the precipitation conditions, and the separating situation for cobalt and nickel and their separation amount of two precipitators were carried out. The effects of seal and interference from cobalt ions and nickel ions on xylenol orange have been eliminated. The recovery of zinc was 99.90% - 100. 10%. This method has been successfully applied to the determination of zinc in specimen of cobalt and nickel by the EDTA titrimetry due to its simplicity, convenience and accurate result.

关 键 词：PAN 丁二酮肟 EDTA 锌 

分 类 号：O655.2[理学—分析化学]