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下列两个定性分析中的改良方法,系作者数年前曾经发表过的建议。由於作者从前思想的错误,把比较重要的论文,不用祖国文字写出而写成英文,不送登本国杂志而在美国化学教育刊物上发表;致国内分析化学专家,对此二文,或未曾注意到。现值政府厉行教学改革之际,一方面鉴於分析矿砂之重要性,钨的分析乃矿物分析专修科教学上极需要的教材;一方面鉴於苏联大学分析化学大纲内,有“使不易溶解的化合物成溶液的各种方法”句,制备溶液之改良制法,亦属各种方法之一,为今後定性分析课程之有用教材。因此,特将这两个分析方法,重行修改一下,写在下面,以求
The following two qualitative analysis of the improvement method, the author published a few years ago the proposal. Due to the mistakes made by the author in the past, the more important essay was written in English without the written written in the motherland, and was published in the journal of the American Chemistry Education without being published in the national magazine. To domestic analytical chemistry experts, To On the one hand, in the light of the importance of analysis of ore, the analysis of tungsten is a material that is extremely needed in the teaching of mineral analysis. On the one hand, in view of the outline of the analytical chemistry program of the Soviet University, there is “ Compounds of various methods into solution ”sentence, the preparation of the improved method of preparation, also belong to one of the methods for the qualitative analysis of the course useful teaching materials. Therefore, especially these two analysis methods, revising a bit, write below, in order to