斑点分析-21〜27-

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XXI. Fe+++ is reduced to Fe++ by the U++++, the Fe++ turns pink by the alkaline solution of dimethylglyoxime and this reaction is applied for detection of U; the limit of detection is 0.98γ. XXII. Since carbonic acid has a property of discoloring brown color of uranyl-ferrocyanide, this.is applied for detection of carbonic acid ;the limit of detection is 0.4γ. XXIII. A solution of metallic Se in KCN is acidified to give red precipitate of Se. The limit of detection of Se by this reaction is 10γ. XXIV. Cinchonine.. KI solution gives white precipitate by the addition of Cd. The limit of detection of Cd by this method is 0.7γ. XXV, Cinchonine.. Bi(NO3)3 solution gives white precipitate on addition of Br-. The limit of detection of Br- by this method is 5γ. XXVI. A solution of V++ reduces Ge salt and gives colloidal precipitate. The limit of detectionof Ge by this reaction 5γ. XXVII. The F of titanium fluorides in hydrogen peroxide solutionis liberated by the addition ofBe to give yellow pertitanic acid and this is applied for detection of Be; the limit of detection is 3γ.