单柱离子色谱法测定痕量草酸根离子

Study on Trace Oxalate Denomination by Single Column Ion Chromatography

摘要: 本文采用单柱离子色谱系统测定了C₂O₄^2-.以1.3mmol/L葡萄糖酸钠/1.3mmol/L硼砂为淋洗液测定C₂O₄^2-,常见阴离子Cl^-、NO₃^-、HPO₄^2-、SO₄^2-不干扰测定,C₂O₄^2-的检出限为0.57mg/L,相对标准偏差为1.07%,工作曲线的线性范围为0.57-500mg/L.应用本方法测定了加C₂O₄^2-的自来水样,C₂O₄^2-的回收率为99.52%.

Abstract: In this paper,analysis of trace oxalate by single column ion chromatography is described. 1.3 mmol/L sodium gluconate and 1.3 mmol/L borax were used as the eluent,IC-PAN anion column for the separation and conductivity detector for the detection. The detection limit was 0.57mg/L.The relative standard deviation was 1.07%.The calibration plot was linear in the range of 0.57-500mg/L.his method has been applied to analyze drinking water spiked with C₂O₄^2- with 99.52% average recovery.