【摘要】 本文介绍了一种采用抑制型电导检测器的离子色谱法检测人体营养补充液中阴阳离子和有机酸的方法。选择的色谱条件为:(1)阴离子,IonPac AS23阴离子交换柱,淋洗液自动发生装置在线产生KOH梯度淋洗,抑制型电导检测;(2)阳离子,IonPac CS12A阳离子色谱交换柱,甲烷磺酸等度淋洗,抑制型电导检测。将人体营养补充液样品稀释一定倍数后分别直接进样分析,检测了低至低μg/L级(以溶液计)的阴阳离子。该方法对十种阴阳离子的检出限(S/N=3)从3．6到59．0μg/L,线性范围均跨越两个数量级以上,线性相关系数r为0．9988～0．9999,连续11次进样RSD值小于4%,加标回收率在94．6%～103．9%之间,用于实际样品的检测,结果令人满意。更多还原

【Abstract】 The present paper introduced a method to separate analytes.by ion chromatography columns so as to detect anions,anions and organic acids in human nourishment solutions with suppressed conductivity detector.The separa- tion and determination were obtained by(1)anions and organic acids:IonPac AS23 anion exchange column and KOH gradient eluent generated by ECJC eluent generator together with suppressed conductivity detector;(2)cations:IonPac CS 12A cation exchange column and MSA isocratic eluent together with suppressed conductivity detector.Diluting and injecting liquid samples to IC system,the lowμg/L ions in human nourishment solutions are obtained.The detection limits are from 3.6 to 59.0μg/L.It may calibrate over two orders of magnitude in concentration of 9 ions while the range of linear coefficients from 0.9988 to 0.9999,RSDs are below 4 % for all analytes while the recoveries are between 94.6%～1 03.9 %.The results of analysing actual samples are satisfactory.更多还原