摘要
在 pH 6 0~ 6 5的乙酸—乙酸钠缓冲溶液中 ,以氨三乙酸掩蔽铁 ,重铬酸铵沉淀钡为铬酸钡 ,与共存干扰元素分离 ;铬酸钡溶于盐酸中 ,用硫酸亚铁铵标准溶液滴定铬酸根 ,间接测定钡。
In the medium of NaACHAC, pH6.0~6.5 buffer,with ammonium triacetic acid as masking agent for Fe(Ⅲ),(NH_4)_2Cr_2O_7 was added to precipitate the barium by forming BaCrO_4,thus separating Barium from interferences of coexisting elements.BaCrO_4 are dissolved in hydrochloric acid,(NH_4)_2Fe(SO_4)_2 standard solution titration CrO_42-,can indirectly determine Barium content.
出处
《铸造技术》
CAS
北大核心
2000年第2期22-23,共2页
Foundry Technology
关键词
硅钡合金
钡
测定
间接法
铸造
孕育剂
Silicobarium alloy
Barium determination
Indirect method