重量法及EGTA滴定法联合测定硅钡钙铁合金中硅、钡、钙  

Combined determination of silicon,barium,and calcium in ferro-calsibar alloy by gravimetry and EGTA complexometric titration

作　　者：高学峰 

机构地区：[1]山东省淄博市理化测试中心,山东淄博255040

出　　处：《冶金分析》2002年第1期44-46,共3页Metallurgical Analysis

摘　　要：硅钡钙铁合金样品经混合熔剂熔融 ,高氯酸脱水析出硅 ,用六次甲基四胺 -二乙基二硫代氨基甲酸钠 (DDTC)消除铁、铝等元素对钡、钙的影响 ,以 0 2mol/L硫酸沉淀钡 ,实现 (于 pH12 )乙二醇二乙醚二胺四乙酸 (EGTA)对钡、钙的测定。硅、钡、钙的RSD(n =8)分别为 0 16% ,1 19% ,1 19% 。After fusing the sample by mixed flux, separating silicon by dehydration with perchloric acid, eliminating the interference of iron and aluminium on barium and calcium with hexamethylene tetramine diethyldithiocarbamic acid(DDTC),precipitating barium by dilute sulfuric acid(0 2mol/L),a method for the combined determination of silicon, barium and calcium in ferro calsibar alloy by gravimetry and EGTA complexo metric titration at pH12 was realized with satisfactory results. RSD of silicon,barium and calcium was 0 16%,1 19% and 1 19% respectively.

关 键 词：硅钡合金 联合测定 硅 钡 钙 重量法 EGTA滴定法 炼钢 脱氧剂 

分 类 号：O655.2[理学—分析化学]