乙二胺-柠檬酸流动相的非抑制型离子色谱法测定二价金属离子  

DETERMINATION OF DIVALENT METAL IONS BY NON-SUPPRESSED ION CHROMATOGRAPHY USING ETHYLENEDIAMINE-CITRIC ACID AS MOBILE PHASE

作　　者：于泓[1] 王春凤[1] 胡庆华 

机构地区：[1]哈尔滨师范大学 [2]黑龙江化工厂

出　　处：《哈尔滨师范大学自然科学学报》1999年第4期83-87,共5页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省自然科学基金;黑龙江省教委基金资助课题

摘　　要：用乙二胺 -柠檬酸流动相的非抑制型离子色谱法分离测定了Ni2 +、Zn2 +、Fe2 +、Mg2 +、Mn2 +、Cd2 +、Ca2 +和 Sr2 + 8种离子 .研究了流动相组成对保留值的影响 ,当流动相中乙二胺浓度或柠檬酸浓度或流动相 p H值增大时 ,保留值均减小 .选择 0 .2 5 mmol/L乙二胺 -0 .5 0 mm ol/L柠檬酸 ( p H4.5 0 )作流动相测得了上述 8种离子的检出限和线性范围 .方法用于叶面肥试样分析 。The determination of Ni 2+ 、Zn 2+ 、Fe 2+ 、Mg 2+ 、Mn 2+ 、Cd 2+ 、Ca 2+ and Sr 2+ by non-suppressed ion chromatography using ethylenediamine-citric acid as mobile phase was described.A cation-exchange column was employed for separation and a conductivity monitor for detection.The effect of the mobile phase composition on retention value was studied.The retention value of ion decreased with increasing ethylenediamine concentration or citric acid concentration or pH of the mobile phase.When 0.25 mmol/L ethylenediamine-0.50 mmol/L citric acid (pH4.50) is used as mobile phase,the detection limit and the linear range of ions were obtained.The method has been applied to the determination of leaf surface fertilizer sample with satisfactory result.

关 键 词：离子色谱法 乙二胺 柠檬酸 二价 金属离子 测定 

分 类 号：O657.75[理学—分析化学]