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目前高含量钙,镁化学分析一般均采用络量法。锶,钡,钙,镁因其化学性质相似,共生现象普遍。在其络合滴定测定中由于相互干扰严重,往往辅以较为复杂的分离手续。迄今,钡锶试料中的钙镁络合滴定法仍无一理想的方案。不得不沿用以碳酸铵分离镁后将钙,锶,钡化为硝酸盐,再以丙酮分离钙的复杂手续。
At present, high content of calcium, magnesium chemical analysis are generally used volume method. Strontium, barium, calcium, magnesium because of their similar chemical properties, symbiosis common. In complexometric titration determination due to mutual interference serious, often supplemented by more complex separation procedures. So far, there is still no ideal solution for calcium-magnesium complexation titration in barium-strontium samples. Have to follow the use of ammonium carbonate after separation of calcium, strontium, barium into nitrate, and then the complex procedure of acetone separation of calcium.