亚氨基二乙酸键合的亲水单分散聚合物基质离子色谱填料的制备及应用

Preparation and Application of iminodiacetic acid Bonded hydrophilic monodisperse ion chromatographic packings

以自合成的5.0μm单分散大孔亲水交联聚甲基丙烯酸环氧丙酯(PGMA-EDMA)微球为基质,与亚氨基二乙酸键合,合成了亲水性阳离子色谱固定相。用3.5 mmol/L甲烷磺酸作淋洗液,在流速为1.0 m L/min下,对二乙醇胺、Na+、NH4+、K+混合样及有机胺和铵离子混合样进行分离。将其用于黄纸板中阳离子的分离测定,与原子吸收法(AAS)对照,测定结果基本一致。

A hydrophilic weak acidic cation stationary phase was synthesized by chemical modification of iminodiacetic ac- id on the base of 5.0μm monodisperse macroporous hydrophilic poly （glycidylmethacrylate-co-ethylenedimethacrylate ） （PGMA EDMA） beads. The mixture of diethanolamine, Na＋, K＋ , ammonium （NH4＋） and the mixture of organic amines and ammo- nium can be separated by the elution with 3.5mmol/L methyl vitriol at 1.0 mL/min. The column was used for the separation of cations from strawboard, The obtained result was consistant with that of AAS method, the effect of resolution is almost same.