摘要
试料用盐酸、硝酸、硫酸分解后,用氨水调节酸度使铁沉淀完全,过滤使铁和铜、锌分离。滤液可做锌的测定,滤纸放入原烧杯,用盐酸溶解,调节酸度pH2.0,加入磺基水杨酸做指示剂在近沸的状态下用EDTA标准溶液滴定。
After the sample is decomposed with hydrochloric acid, nitric acid, sulfuric acid, iron completely pre- cipitates by ammonia to adjuste acidity. Iron, copper and zinc are separated by filtration. The filtrate can be used for zinc determination. The filter paper is put into the previous beaker and hydrochloric acid is added for dissolu-tion, and the acidity is adjusted to pH2. 0. Then sulfosalicylic acid is added as indicator for EDTA standard solu- tion titration in nearly boiling state.
出处
《中国有色冶金》
CAS
北大核心
2016年第6期75-77,共3页
China Nonferrous Metallurgy
关键词
锌铁连测
环保
酸度的调节
zinc regulated iron determination
environmental protection
acidity adjustment
