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以往对于铁鋁的测定,一般多采用分别测定的方法,其中铁含量的测定采用重鉻酸鉀法;鋁含量的測定,有时采用酸碱法,而更多的是采用R_2O_3的差减法。因为在处理沉淀R_2O_3时,存在于試液中的钛、錳、铬等离子都将随铁铝沉淀而共同析出,同时R_2O_3的誤差,将集中在Al_2O_3上,这样就很难得到Al_2O_3的正确結果。为了适应大跃进形势的发展,在化学分析方法中,如何寻求和采用一种既經济又合理的快速分析方法,就已經成为当前重要的任务。从有关文献介紹,对于铁鋁分析可以采用EDTA連續滴定法,伹有人认为手續較繁,精
In the past for the determination of iron and aluminum, the more commonly used to determine the method, respectively, of which the determination of iron content by potassium dichromate method; determination of aluminum content, and sometimes the use of acid-base method, and more is the use of R 2 O 3 subtraction method. Because in the treatment of precipitated R_2O_3, the titanium, manganese and chromium ions present in the test solution will co-precipitate with the precipitation of iron and aluminum. At the same time, the error of R_2O_3 will be concentrated on Al_2O_3, which makes it difficult to obtain the correct result of Al_2O_3. In order to adapt to the development of the Great Leap Forward, how to seek and adopt an economical and reasonable rapid analysis method in chemical analysis has become an important task nowadays. From the introduction of the literature, for the analysis of iron and aluminum EDTA continuous titration can be used, 伹 some people think that the more complex procedures, fine