单柱阴离子色谱法同时测定无机阴离子、无机阳离子和有机酸的研究

Studies on Simultaneous Determination of Inorganic Anions Inorganic Cations and Organic Acids by Single- Column Anion Chromatography

自Small等首次采用双柱阴离子色谱法测定无机阴离子以来,单柱阴离子色谱法已被用于测定无机阴离子、有机酸,并利用金属阳离子与EDTA形成的阴离子配合物分离测定阳离子。但用单柱阴离子色谱法同时测定无机阴离子、无机阳离子和有机酸尚未见报道。本文采用EDTA为淋洗液的单柱阴离子色谱法研究了无机阴离子、无机阳离子和有机酸的同时分析测定。

The method of simultaneous determination of inorganic anions, inorganic cations and organic acids by single-column anion chromatography was described. An anion-exchange column was employed for separation with conductivity detection. EDTA was used as eluent. The eluent pH should be controlled in the range of 5.5-7. 5. Linear plots of logarithm of the adjusted retention time of the ions vs. the logarithm of the concentration of the eluent were obtained. The detection limits, variation coefficient and calibration curve for those substances were obtained at eluent concentration of 0. 5 mmol/L and pH=7. 0. The method was applied to analyzing chloride. calcium and oxalic acid in Ringer's injection with satisfactory results.