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以往沿用的铝的差减重量法,不特在测定三氧化二物(R_2O_3)的其他组份时所产生的误差全部都集中反映在铝的结果上,且耗时甚为可观。为此,各国化学家为寻求一些快速而有效的方法曾作过种种的努力,其中一大部分都致力于光度法的研究。曾经有很多人描述了各种光度方法,但都嫌宂长且有分离铁和其他干扰元素的麻烦。Eegriwe 首先指出了用爱利罗菁(Er(?)oehromeCyanine)比色测定铝的方法,但铁等干扰元素必需分离。Glemser 等以硫代甘醇酸还原铁,将此方法应
In the past, the weight loss method of aluminum, which is not particularly used in the determination of the other components of the trioxide (R 2 O 3), is concentrated in the result of the aluminum concentration and takes a considerable amount of time. To this end, chemists of all countries have made a great effort to find some quick and effective methods. Most of them are devoted to the study of photometry. Many people once described a variety of photometric methods, but they are too long and have the trouble of separating iron from other interfering elements. Eegriwe first pointed out the method for the colorimetric determination of aluminum with Erlotinine (Er? OehromeCyanine), but the interfering elements such as iron must be separated. Glemser et al use thioglycolic acid to reduce iron, this method should be