Sensitivity and Selectivity of Ion-Selective Electrodes Interpreted Using the Nernst-Planck-Poisson Model

被引:8
|
作者
Jasielec, Jerzy J. [1 ]
Mousavi, Zekra [2 ]
Granholm, Kim [2 ]
Sokolski, Tomasz [2 ]
Lewenstam, Andrzej [1 ,2 ]
机构
[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Phys Chem & Modeling Dept, Al Mickiewicza 30, PL-30059 Krakow, Poland
[2] Abo Akad Univ, Ctr Proc Analyt Chem & Sensor Technol ProSens, Johan Gadolin Proc Chem Ctr, Biskopsgatan 8, Turku 20500, Finland
关键词
LIQUID-MEMBRANE ELECTRODES; LOWER DETECTION LIMIT; TIME-DEPENDENT PHENOMENA; SEPARATE SOLUTION METHOD; TECHNICAL REPORT; NUMERICAL-SIMULATION; POTENTIAL RESPONSE; BULK OPTODES; COEFFICIENTS; SENSORS;
D O I
10.1021/acs.analchem.8b02659
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The Nernst-Planck-Poisson model is used for modeling the sensitivity and selectivity of ion-selective electrodes (ISEs) with plastic membranes. Two pivotal parameters characterizing ISE response are in focus: sensitivity and selectivity. An interpretation of sensitivity, which considers the concurrent influence of anions and cations on the ISE slope, is presented. The interpretation of selectivity shows the validity and limits of approaches hitherto taken to measure the true (unbiased) selectivity coefficient. The validity of more idealized interpretations by the diffusion-layer model is conceived.
引用
收藏
页码:9644 / 9649
页数:6
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