关于氯、溴、碘和硫氰酸根离子的纸层析法,Lederer和仲野等曾有报告。本文采用后者的正丁醇—丙酮—氢氧化铵展开剂,着重研究氢氧化銨浓度改变时,对上述四离子圆形纸层析的影响,结果指出,如将其中氢氧化铵的浓度降低至仅l/10时,同样可以获得良好的分离。因此,不但可使工作者在操作时不受浓氨挥发时的强烈刺激,同时亦可降低 Paper chromatography on chlorine, bromine, iodine and thiocyanate ions has been reported by Lederer and Nakano et al. In this paper, we use the latter n-butanol-acetone-ammonium hydroxide developing agent to focus on the influence of ammonium hydroxide concentration on the above four-ion circular paper chromatography. The results show that if the ammonium hydroxide concentration is reduced Up to only 1/10, the same good separation can be obtained. Therefore, not only can the worker be strongly stimulated during the operation without concentrated ammonia volatilization, but also reduce