摘要
本文用石墨坩埚和混合溶剂在马弗炉中熔融试样,稀盐酸浸取,以氨水分离铁、铝、钛,铜试剂分离锰,分取部分滤液,加少量钙黄绿素-茜素混合指示剂用EGTA标准液滴定测定其氧化钙含量;再分取部分滤液,加过量EGTA标准溶液掩蔽钙,以酸性铬蓝K萘酚绿B为指示剂,用CyDTA标准溶液滴定,测定其氧化镁的含量。
In this paper,graphite crucible and mixed solvent are used to melt the sample in muffle furnace.Dilute hydrochloric acid is used to soak the sample,and ammonia is used to separate iron,aluminum,titanium man-ganese.Part of the filtrate is separated,a small amount of calcein indicator is added to titrate the content of calcium oxide with EGTA standard solution;Part of the filtrate is separated,excess EGTA standard solution is added to mask calcium,acid chrome blue K naphthol green B is used as indicator,and CyDTA.standard solution is used to titrate the content of magnesium oxide.
作者
乔红梅
赵海东
祁正荣
祁旭丞
QIAO Hong-mei;ZHAO Hai-dong;QI Zheng-rong;QI Xu-cheng(Qinghai key laboratory of Metallurgical Product Research and development,Qinghai Xigang Special Steel Technology Development Co.Ltd,Xining 810005,China)
出处
《世界有色金属》
2023年第9期184-186,共3页
World Nonferrous Metals
