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在藥品分析化学中检验CN~-時,一般均使它生成普魯士藍或生成硫氰化鐵的紅色溶液,來檢驗氰根的存在。我們根據這兩個方法的原理,在操作方法上改良了一下,不但效果相同,手續簡便,反應靈敏,而且可以防止帶色樣品對檢驗中顏色反應觀察的影響。現在把經過改良後的方法介紹於下: 一、普魯士藍法: 原理:氰化物在酸性溶液中能生成揮發性的HCN而逸出,被吸收於試紙條上附有的氢氧化鈉中,生成NaCN,然後再與硫酸亞鐵作用生成Fe(CN)_2,此生
In the pharmaceutical analysis of chemicals CN ~ -, usually make it to generate Prussian blue or red ferric thiocyanate to test the presence of cyanide. According to the principles of these two methods, we improved the operation method not only with the same effect, simple procedures, and responsiveness but also can prevent the colored samples from affecting the color reaction observation during the test. Now the improved method introduced in the next: First, Prussian blue method: Principle: Cyanide in acidic solution can generate volatile HCN and escape, was absorbed in the test strip attached to the sodium hydroxide, Generate NaCN, and then with the role of ferrous sulfate to generate Fe (CN) _2, this life