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本研究利用紙上顯色分離(paper chromatography)以求免去無機定性分析里分離各離子的繁複操作,使分析工作在很短時間內完成。各離子在紙上向四周擴散時,因為擴散速度的不同而形成同心圆圈,和用吸收柱作顯色分離的結果相似。因為無機金屬離子多為無色,所以應該選擇適當的顯色劑(developer)以顯示之。如此就可以用一滴未知物溶液同時决定一個以上之離子的存在。在本報告中,研究銀族離子(銀、亚汞及鉛)之分析方法。在本研究中,作者使用紫尿酸鋅(zinc purpurate)作顯色劑。G.Deniges首先提出紫尿酸鋅的反應,據其報告:紫尿酸鋅与銀離子生紫色沉澱;與高汞離子生桃紅色沉澱。作者曾作其與各种陽離子之变化(斑点試驗),所得之結果如下:
In this study, paper chromatography was used in order to avoid the complicated operation of separating various ions in the inorganic qualitative analysis, so that the analysis work could be completed in a very short period of time. When the ions are diffused around the paper due to the difference in diffusion rate, concentric circles are formed, which is similar to the result of the color separation by the absorption column. Because inorganic metal ions are mostly colorless, a suitable developer should be chosen for display. In this way, one drop of unknowns solution can simultaneously determine the presence of more than one ion. In this report, we study the analytical methods for silver ion (silver, mercury, and lead). In this study, the authors used zinc purpurate as a color developer. G. Deniges first proposed the reaction of zinc uracetate, according to which reports: violet purple and silver ions purple precipitate; pink peaches with high mercury ions. The authors have made a variety of cations with their changes (speckle test), the results obtained are as follows: