scholarly journals Modeling the response of a control-released ion-selective electrode and employing it for the study of permanganate oxidation kinetics

2018 ◽  
Vol 10 (4) ◽  
pp. 467-473 ◽  
Author(s):  
Dean Song ◽  
Rongning Liang ◽  
Xiaohua Jiang ◽  
Huiqing Sun ◽  
Fanyu Kong ◽  
...  
Keyword(s):  
Controlled Release ◽  
Oxidation Kinetics ◽  
Theoretical Modeling ◽  
Ion Selective Electrode ◽  
Potentiometric Sensors ◽  
Response Behavior ◽  
Selective Electrode ◽  
Permanganate Oxidation ◽  
First Time

For the first time, theoretical modeling of the response behavior of the potentiometric sensors based on the controlled release of the reagents is reported.

scholarly journals Photoelectric current as a highly sensitive readout for potentiometric sensors

2020 ◽  
Vol 56 (27) ◽  
pp. 3879-3882 ◽  
Author(s):  
Xu Hun ◽  
Xiaoli Xiong ◽  
Jiawang Ding ◽  
Wei Qin
Keyword(s):  
Reference Electrode ◽  
Ion Selective Electrode ◽  
Potentiometric Sensors ◽  
Polymeric Membrane ◽  
Selective Electrode ◽  
Photoelectric Current ◽  
Working Electrode ◽  
Highly Sensitive

The photocurrent at a working electrode coated with a ZnSe/r-GO composite can be modulated by a polymeric membrane ion-selective electrode that works as a reference electrode.

scholarly journals Potentiometric Solid-Contact Ion-Selective Electrode for Determination of Thiocyanate in Human Saliva

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2817
Author(s):  
Marcin Urbanowicz ◽  
Kamila Sadowska ◽  
Dorota G. Pijanowska ◽  
Radosław Pomećko ◽  
Maria Bocheńska
Keyword(s):  
Daily Basis ◽  
Human Saliva ◽  
Ion Selective Electrode ◽  
Potentiometric Sensors ◽  
Membrane Composition ◽  
Solid Contact ◽  
Selective Electrode ◽  
Selective Membrane ◽  
Selection Of

A new solid-contact potentiometric ion-selective electrode for the determination of SCN− (SCN-ISE) has been described. Synthesized phosphonium derivative of calix[4]arene was used as a charged ionophore. The research included selection of the ion-selective membrane composition, determination of the ISEs metrological parameters and SCN-ISE application for thiocyanate determination in human saliva. Preparation of the ISEs included selection of a plasticizer for the ion-selective membrane composition and type of the electrode material. The study was carried out using ISE with liquid internal electrolyte (LE-ISE) and solid-contact electrodes made of glassy carbon (GC-ISE) and gold rods (Au-ISE). The best parameters were found for GC sensors for which the ion-selective membrane contained chloroparaffin as a plasticizer (S = 59.9 mV/dec, LOD = 1.6 × 10−6 M). The study of potentiometric selectivity coefficients has shown that the thiocyanate-selective sensor could be applied in biomedical research for determination of SCN− concentration in human saliva. The accuracy of the SCN− determination was verified by testing 59 samples of volunteers’ saliva by potentiometric sensors and UV-Vis spectrophotometry as a reference technique. Moreover, SCN− concentrations in the smokers’ and non-smokers’ saliva were compared. In order to investigate the influence of various factors (sex, health status, taken medications) on the thiocyanate level in the saliva, more extensive studies on a group of 100 volunteers were carried out. Additionally, for a group of 18 volunteers, individual profiles of SCN− concentration in saliva measured on a daily basis for over a month were collected.

Titration of sulphates and lead using lead ion selective electrode

1981 ◽  
Vol 46 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Josef Veselý
Keyword(s):  
Ionic Strength ◽  
Electrode Surface ◽  
Salt Content ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Selective Electrode ◽  
Limit Of Determination ◽  
Total Salt Content ◽  
Automatic Titration

Titration of sulphates with lead perchlorate employing lead ion selective electrode indication was studied using additions of various organic solvents at different pH' and ionic strength values. As the optimum emerged systems with 60-70% 1,4-dioxane, pH' 5.3-5.6. After dehydration with sodium hydroxide, dioxane must be freed from the electrode surface-oxidizing impurities by their reduction with sodium metal and subsequent distillation. The method was applied to determination of sulphates in mountain spring waters. Units of ppm can be determined; the limit of determination, however, depends considerably on the content of dioxane, total salt content in the sample, and speed of the semi-automatic titration. Lead can be determined with EDTA in concentrations down to c(Pb2+) = 5 . 10-6 mol l-1.

Association of benflurone in aqueous solutions studied by measuring the activity of chloride ions

1986 ◽  
Vol 51 (11) ◽  
pp. 2437-2443
Author(s):  
František Kopecký ◽  
Mária Vojteková ◽  
Milan Pešák
Keyword(s):  
Aqueous Solutions ◽  
Chloride Ions ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Measured Range

The conventional activity of chloride ions was measured by an ion-selective electrode at 25 °C in aqueous solutions of benflurone, i.e. 5-(2-(N,N-dimethylamino)ethoxy)-7-oxo-7H-benzo(c)fluorene hydrochloride, without or with additions of KCl. These results suggest a gradual association of benflurone; the formation of a hetero-associate, (BH+)2Cl-, followed by higher associates was evaluated in the measured range up to 0.1 mol l-1.

New method for the study of surface acidity of zeolites by NH3-TPD, using a pH-meter equipped with an ion selective electrode

2006 ◽  
Vol 112 (1-2) ◽  
pp. 13-18 ◽  
Author(s):  
R. Le Van Mao ◽  
N. Al-Yassir ◽  
L. Lu ◽  
N. T. Vu ◽  
A. Fortier
Keyword(s):  
Surface Acidity ◽  
New Method ◽  
Ion Selective Electrode ◽  
Selective Electrode
Sign in / Sign up

Export Citation Format

Share Document