【摘要】 利用氧化钙易溶解于稀醋酸,而氟化钙不溶解于稀醋酸的特性。试样以稀醋酸处理,用滤纸过滤不溶解物残渣,滤液加氢氧化钾溶液调节pH≥12.5,用EGTA滴定法测定CaO含量。过滤的不溶解物残渣在铂金坩埚中灰化、灼烧,加含有硼酸钠的混合熔剂,于950℃左右熔融、酸化浸取定容、分液后,加氢氧化钾溶液调节pH≥12.5,用EGTA滴定法测定CaF2含量。更多还原

【Abstract】 CaO easily dissolves in dilute CH₃COOH,but CaF₂ doesn’t dissolve in it.The sample is handled in dilute CH₃COOH,residue is filtered with filter paper,colature is transferred PH≥12.5 with KOH solution,CaO will be determined with EGTA titration.Residue is burned in platinum crucible,it will be melted with borc acid mixed rholite in 950℃ and acid treating,leaching,deciding volume and dividing liquid,this liquid is transferred PH≥12.5 with KOH solution,CaF₂ will be determined with EGTA titration.更多还原