使用碳酸钠-碳酸氢钠淋洗液体系时阴离子保留值预测模型的改进

 对几年前建立的使用碳酸钠 碳酸氢钠淋洗液体系时阴离子保留值预测模型进行了改进 ,改进了的预测模型能适用于更宽的碳酸钠 碳酸氢钠浓度变化范围。通过实验测得使用不同浓度的碳酸钠 碳酸氢钠作为淋洗液时硝酸根、硫酸根、磷酸根、砷酸根、草酸根、硒酸根、碘离子等 7种阴离子的保留因子数据 ,对数据进行了二元线性回归处理 ,在较宽的淋洗液浓度范围内 ,硝酸根、硫酸根、草酸根、硒酸根、碘离子的保留因子和碳酸钠 碳酸氢钠浓度的相关系数都在 0 999以上 ,磷酸根、砷酸根的保留因子和碳酸钠 碳酸氢钠浓度的相关系数分别为 0 9971和0 995 7。

Improvement of Prediction Model of Retention Values of Anions with Sodium Carbonate-Sodium Bicarbonate as Eluents

A prediction model of retention values of anions with sodium carbonate sodium bicarbonate as eluents has been improved. The improved model is suitable for a wider range of concentrations of sodium carbonate sodium bicarbonate eluents than the old one set up several years ago. An extensive set of experimental retention data obtained for 7 anions (nitrate, sulfate,oxalate,selenate, iodide, phosphate and arsenate ) using the eluents of varied concentrations was dealt by binary linear regression process. The improved model gave satisfactory performance with correlation coefficients over 0 999 for nitrate, sulfate,oxalate,selenate and iodide, of 0 997?1 for phosphate, and of 0 995?7 for arsenate. A computer program has been designed with the prediction model to simulate the separation of anions and used to optimize the routine analysis with sodium carbonate sodium bicarbonate as the eluent .