用卡尔曼滤波作非平衡电位滴定

Non-Equilibrium Potentiometric Titrations Using Kalman Filtering

用长链四烷基锡为中性载体制备了性能优良的十二烷基磺酸根PVC膜电极。用其为指示电极,以非平衡方式进行快速电位滴定。借卡尔曼滤波方法可靠地确定等当点。引入的滤波算法具有通用性,能有效地节省电位滴定分析时间。

A new dodecyl sulfonate-selective PVC membrane electrode based on long-chain tetraalkyhin neutral carriers was prepared. By using this electrode as the indicator electrode, tetradecylpyridinium chloride can be titrated with dodecyl sulfonate potentiometrically in a fast, continuous, non-equilibrium way. The equivalence point of this non-equilibrium potentiometric titration system can be found chemometrically with the aid of Kalman filtering. The proposed procedure and Kalman filter algorithm effectively shortened the time of analysis in potentiometric titrations.