化学分析中铬和铝等干扰元素的分离方法

Interference elements,chromium and aluminum,separating method in chemical analysis

采用氟化物置换络合滴定法测定金属铬中的铝含量时,铬离子的存在会产生强烈干扰,在适当的化学条件下,使铬离子生成能够分离的氯化铬酰气体,可消除铬离子的干扰影响;采用原子吸收法测定镁合金中的锰含量时,铝的存在会产生明显干扰,在适当的化学条件下使铝离子生成能够分离的苯甲酸铝沉淀,可消除了铝的干扰影响。

To check on the aluminum in metallic chromium with the compleximetry,the chromium should be displaced by fluoride.The chromium ions interact the checking seriously.Under certain chemical conditions,the chromium ions produce chromyl chloride gas which can be separated and the chromium interaction could be eliminated.For determing the manganese content in Mg-Al alloy using atom absorbing method,the aluminum ions should be seperated in the form of aluminum benzoate,that was produced by aluminum ions under some chemical conditions.The interference of aluminum is eliminated accordingly.