单柱离子色谱分析若干无机阴离子的初步研究

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~+。

Preliminary Studies on the Analysis of Some Inorganic Anions by Single-Column Ion Chromatography

This paper described a new technique in the analysis of inorganic anionsby single-column ion chromatography,in which neither suppressor column nor regener-ation of the resins is necessary.Low capacity anion exchange resins can be preparedfrom a commercially available porous ethylstyrene-divinylbenzene copolymer.With ben-zoate as eh(?)nt,fluoride,chloride and bromide can be separated,the fluoride and chloridepeaks being sharp but the bromide peak broad.When phthalate is used as eluent,the re-tention time of these anions are reduced,and the fluoride peak is overlapped in the "in-jection peak",while chloride,bromide and sulfate peaks are distinctly separated.The re-tention time of anions and their peak height are greatly influenced by the concentrationand pH values of the eluent.The presence of cations in phthalate eluent will affect thesensitivity of detection (Li~+Na~+>K~+>NH_4~+.