Dynamic Potentiometry with an Ion-Selective Electrode: A Tool for Qualitative and Quantitative Analysis of Inorganic and Organic Cations

A study of the transient potential signals obtained with a cation-selective electrode based on an ion-exchanger was carried out for solutions following individual cations at different concentrations: H+, Li+, Na+, K+, Rb+, Mg2+, Ca2+, choline (Ch+), acetylcholine (AcCh+), and procaine (Pr+). Three general types were distinguished depending value selectivity coefficient corresponding ion. principal component analysis (PCA) performed signals, finding that qualitative identification ion from scores two components is possible. The extended to containing analyte in presence interfering PCA signal allows detection ions, thus avoiding biased results determination analyte. Moreover, each ions concentrations allow construction calibration graphs quantitative All experimentally this work can be reconstructed accurately their scores.