非抑制型离子色谱法同时测定多种微量元素的研究

Simultaneous Determination of many Kinde Trace Element Ions by Non-repress Type Ion Chromatography

本文介绍用柠檬酸／乙二胺为淋洗液，同时测定铜、铅、镍、锌等离子的非抑制型离子色谱法。通过试验，选择出最佳色谱分离条件，得出各金属离子的工作曲线方程，相关系数０．９９７～０．９９９，检出限０．０２３～０．０８７μｇ／ｍＬ，相对标准偏差０．７３～２．５％和回收率９７．２３～１０４．３０％，应用于茶叶试样分析，获得满意结果。该法具有简便、快速、准确、选择性好的特点。

A method for simultaneous determination of trace-metallic element Ions of copper. nickel、zinc、magnesium、iron、manganese、calcium、lead and strontium is investigted by means of non-repress type Ion chromatography used eluant of ethylenediammonium/citric acid in this paper. A cation-exchange column was employed for separation with non-suppressor conductivity detection. optimum conditions of chromatography separation were selected by contrast excellent test. The equations of working curve, relative coefficients 0.997～0.999, detection limits 0.023～0.087 μg/ml, reletive standard deviation 0.73～2.5% and recoveries 97.23～104.30% for all matallic Ions were obtained. The method was applied for analysis of tea with satisfactory resules. The method have characteristics of simplicity. Rapidity. Accuracy and good selectivity.