新型弱酸性阳离子色谱柱的制备及非抑制型离子色谱法电导检测  

Preparation of a new weakly acidic cation exchanger and the evaluation of cations by non-suppressed ion chromatography.

作　　者：郭龑茹[1] 朱岩[1] 叶明立[1] 

机构地区：[1]浙江大学化学系,浙江杭州310028

出　　处：《浙江大学学报（理学版）》2007年第2期210-213,218,共5页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(20375025);浙江省自然科学基金资助项目(Z404105);教育部和浙江省留学人员启动基金;分析测试基金资助项目

摘　　要：制备出一种新型弱酸性非抑制电导检测阳离子色谱固定相,并通过对色谱条件的摸索选择,成功实现了常见一价、二价阳离子的分离检测,以及过渡金属离子Ni2+,Mn2+的分离检测.选用甲基磺酸溶液(2 mmol.L-1)和草酸(0.5 mmol.L-1)的混合液作为流动相,一步分离并测得了Li+、Na+、NH4+、K+、Mg2+、Ca2+6种阳离子的检测限和线性范围.选用酒石酸(2 mmol.L-1)和草酸(1 mmol.L-1)的混合溶液为流动相,成功分离并测得了过渡金属离子Ni2+,Mn2+的检测限和线性范围.用于雨水分析,实验结果良好,应用效果令人满意.Any analytical method may have some drawbacks and limitations. A major disadvantage of the original ion chromatograph is that it requires the use of a large suppressor column that contributed to peak broadening and requires frequent regeneration. A new chromatographic stationary phase of monodispersed pellicular cation exchanger was prepared. Its chromatographic properties were evaluated by non-suppressed ion chromatography with alkali metal （Li^＋ , Na^＋ , K^＋ ）, ammonium （NH4^＋ ）, alkaline earth metal （Mg^2＋ , Ca^2＋ ）, and transition metal ions （Ni^2＋ , Mn^2＋ ）. The common mono- and divalent cations can be separated by elution with 2 mmol·L^-1 methyl vitriol and 1 mmol· L^-1 oxalic acid, and Ni^2＋ , Mn^2＋ can be separated by tartaric acid and oxalic acid （2 ： 1）. The results showed that the chromatographic stationary phase provided good resolution, low detection limit and good repeatability. And it can be used in practice.

关 键 词：非抑制 电导检测 离子色谱 固定相 

分 类 号：O657.7[理学—分析化学]