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

Song, Deying; Liang, Rongning; Jiang, Xiaohua; Sun, Hang; Kong, Fanyu; Lv, Bo; Fang, Qiannan; Qin, Wei

doi:10.1039/c7ay02735d

Cited by 7 publications

(1 citation statement)

References 33 publications

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“…Referring these three major byproducts of THF degradation, 29,30 most of the commercially available potential byproducts (0.1% v/v diluted in fresh THF without inhibitors) have been tested by GC/MS (Figure 1C). Two THF degradation byproducts, 2-hydroxytetrahydrofuran (THF− OH) and γ-butyrolactone (THF�O), matched with the impurities P 1 and P 2 , respectively, at the same retention time.…”

Section: T H Imentioning

confidence: 99%

A New Discovery on the Potential Stability of Ion-Selective Membranes: The Poison from Tetrahydrofuran

Mao,

Zhao,

Loong

et al. 2024

ACS Sens.

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Ion-selective electrodes (ISEs) have widespread use in the fields of clinical and environmental analyses. Tetrahydrofuran (THF) is the most used solvent for the preparation of modern ISEs, equipped with ion-selective membranes (ISMs). Until now, the influence of impurities in THF toward potentiometric instability of ion-selective membrane based ISEs was probably associated with the presence of either residual water or peroxide. To address this issue, most literature recommends redistilling THF prior to use in the preparation of the potentiometric membranes. Current study reveals that the actual THF impurity that is responsible for potential instability in the ISM includes products from the oxidation of THF, which contains the hydroxyl group and possibly carbonyl group with a boiling point of above 200 °C. The density functional theory calculation supported pathway of the chemical reaction of THF oxidation, hence, the chemical structure of the uncertain impurities was predicted. The underlying reason for the deteriorating potential stability of the ISEs is proposed as the significant hydrophilicity of these impurities that affect the partitioning of the ion sensing components in the membrane, thus enhancing the leaching of the membrane components from the membrane phase. This finding explains why redistillation of aged THF is advised.

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Section: T H Imentioning

confidence: 99%

A New Discovery on the Potential Stability of Ion-Selective Membranes: The Poison from Tetrahydrofuran

Mao,

Zhao,

Loong

et al. 2024

ACS Sens.

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Status of phthalate esters in tobacco cultivation soils and its health risk to Chinese people

et al. 2020

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Acidic permanganate oxidation of sulfamethoxazole by stepwise electron-proton transfer

et al. 2019

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

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

Cited by 7 publications

References 33 publications

A New Discovery on the Potential Stability of Ion-Selective Membranes: The Poison from Tetrahydrofuran

A New Discovery on the Potential Stability of Ion-Selective Membranes: The Poison from Tetrahydrofuran

Status of phthalate esters in tobacco cultivation soils and its health risk to Chinese people

Acidic permanganate oxidation of sulfamethoxazole by stepwise electron-proton transfer

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