【摘要】 用国产高效离子交换色谱仪及国产阴离子交换树脂研究了分离Cl~-、Br~-、Ⅰ~-的条件,以硝酸钠为洗脱液,在三十五分钟内完全分离了上述三种离子。进行了一些样品的定量测定。用无换向阀的予柱富集测定了去离子水中ppb级的Cl~-。从软硬酸碱理论的观点讨论了Cl~-、Br~-.Ⅰ~-的色谱行为,得出了用结构参数及实验条件估算分配系数的经验式:1gD=0.24φg[B]-1g[B]+0.49φ+0.61。更多还原

【Abstract】 The conditions of HPIEC separation of Cl-, Br- and I- were studied. The ions were separated within 35 minutes by using NaNO3 as an eluent. the chloride and bromide contents of.some samples were- determined. The trace amounts (ppb order) of chloride in pure water were determined by using a pre-column without a four or six way valve.The IEC becaviouf of Cl-, Br- and I- was interpreted from the theory of hard and soft acids and bases. The following experimental formula was obtained.lgD= 0.24φlg[B]-lg[B] + 0.490 + 0.61where D is the distribution coefficient of an anion, [B] is the concentra-tion of the eluent, φ is the softness of the anion as a base.更多还原