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本文所提出的单柱离子色谱分离阴离子混合物的技术,不用抑制柱,树脂也无需再生。用国产多孔乙基苯乙烯-二乙烯苯共聚物制备了不同交换度的低容量阴离子交换树脂。以苯甲酸盐为洗脱液,F~-、Cl~-、Br~-可以分离,F~-峰尖锐,Br~-峰较宽。以邻苯二甲酸氢盐为洗脱液,保留时间均减小,但F~-峰被进样峰所掩盖,Cl~-、Br~-、SO_4~-:可满意地得到分离,洗脱液的浓度和pH对阴离子分离的保留时间和峰高有较大的影响。邻苯二甲酸氢盐中不同的阳离子,由于它们的电导背景不同(Li~+Na~+>K~+>NH_4~+。
The proposed single column ion chromatography separation of anionic mixture technology, without inhibiting the column, the resin also does not require regeneration. Low porosity anion exchange resin with different exchange degree was prepared by domestic porous ethyl styrene - divinylbenzene copolymer. With benzoate as eluent, F ~ -, Cl ~ -, Br ~ - can be separated, F ~ - peak sharp, Br ~ - peak wide. With the hydrogen phthalate as the eluent, the retention time decreases, but the F ~ - peak is obscured by the injection peak. Cl ~ -, Br ~ - and SO_4 ~ - can be satisfactorily separated and eluted The concentration and pH of the liquid have a large effect on the retention time and peak height of the anion separation. Different cations in the hydrogen phthalate show different detection sensitivities and relative retention times due to their different conductive backgrounds (Li ~ + K ~ +> NH_4 ~ +.