On the origin of the Hofmeister effect in anion-selective potentiometric electrodes with tetraalkylammonium salts

Wojciechowski, Kamil; Kucharek, Marta; Wróblewski, Wojciech; Warszyński, Piotr

doi:10.1016/j.jelechem.2009.11.015

Cited by 21 publications

(4 citation statements)

References 55 publications

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“…The K Pot NO − 3 ,X − values summarized in Table 2 demonstrate a selectivity behavior governed by the ion lipophilicity, which is typical for potentiometric sensors based exclusively on an ion exchanger immobilized in a plasticized PVC membrane [50]. Therefore, the selectivity followed the Hofmeister series [51], exhibiting minimal response to CO 3 2− , SO 4 2− , and HPO 4 2− and enhanced response to I − and ClO 4 − . Even when the concentration of the interfering ions decreased to 10 −4 M, these last two anions showed substantial interference (Figure S4 and Table 2).…”

Section: Potentiometric Response Of Go-based All-solid-state No 3 -Isesmentioning

confidence: 85%

All-Solid-State Potentiometric Sensor Based on Graphene Oxide as Ion-to-Electron Transducer for Nitrate Detection in Water Samples

Gil,

Rodriguez-Lorenzo,

Espiña

et al. 2024

Chemosensors

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Graphene oxide (GO) was used as an ion-to-electron transducer for all-solid-state nitrate electrodes based on an alkyl ammonium salt as the sensing element. Commercially available carbon screen-printed electrodes modified with GO were used as conductive substrates, whose morphology and distribution along the surface were evaluated by scanning electron microscopy and Raman spectroscopy. The potentiometric performance of the GO-based electrodes revealed a Nernstian slope of −53.5 ± 2.0 mV decade−1 (R2 = 0.9976 ± 0.0015) in the range from 3.0 × 10−6 to 10−2 M and a lower limit of detection of 1.9 × 10−6 M. An impressive reproducibility between equally prepared electrodes (n = 15) was demonstrated by a variation of <6% for the calibration parameters. Constant current chronopotentiometry and water layer tests were used to evaluate the potential signal stability, providing similar performance to previously published works with graphene-based ion-selective electrodes. Notably, the GO-based sensors showed the absence of a water layer, a long-term drift of 0.3 mV h−1, and a stable performance (LOD and sensitivity) over 3 months. The applicability of the proposed sensors was demonstrated in determining nitrate levels in water samples with great accuracy, yielding recovery values from 87.8 to 107.9%, and comparable (p > 0.05) results to a commercial nitrate probe. These findings demonstrate the use of GO as an alternative ion-to-electron transducer for the fabrication of all-solid-state potentiometric electrodes.

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Section: Potentiometric Response Of Go-based All-solid-state No 3 -Isesmentioning

confidence: 85%

All-Solid-State Potentiometric Sensor Based on Graphene Oxide as Ion-to-Electron Transducer for Nitrate Detection in Water Samples

Gil,

Rodriguez-Lorenzo,

Espiña

et al. 2024

Chemosensors

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“…[60][61][62][63][64][65][66] In general, electrochemical ion sensors are based on electrostatic interaction, chaotropic/kosmotropic effect at the electrode interface, ion/molecular recognition strategy, etc., to enhance the sensitivity, selectivity, specificity, and stability of ion sensing. [67][68][69][70][71][72][73][74][75][76] Hofmeister effects in the design of ion-selective electrodes are very important not only for fundamental electroanalytichemistry but also of great significance in ion sensor engineering. Recently, Lisensky presented a laboratory case to illustrate this.…”

Section: Electrochemical Ion Sensorsmentioning

confidence: 99%

“…In general, electrochemical ion sensors are based on electrostatic interaction, chaotropic/kosmotropic effect at the electrode interface, ion/molecular recognition strategy, etc., to enhance the sensitivity, selectivity, specificity, and stability of ion sensing. [ 67–76 ]…”

Section: Applying Hofmeister Effects To Develop Ion Sensorsmentioning

confidence: 99%

Hofmeister Effects Shine in Nanoscience

Wei

2023

Advanced Science

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Hofmeister effects play a crucial role in nanoscience by affecting the physicochemical and biochemical processes. Thus far, numerous wonderful applications from various aspects of nanoscience have been developed based on the mechanism of Hofmeister effects, such as hydrogel/aerogel engineering, battery design, nanosynthesis, nanomotors, ion sensors, supramolecular chemistry, colloid and interface science, nanomedicine, and transport behaviors, etc. In this review, for the first time, the progress of applying Hofmeister effects is systematically introduced and summarized in nanoscience. It is aimed to provide a comprehensive guideline for future researchers to design more useful Hofmeister effects-based nanosystems.

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“…34 In potentiometry, the Hofmeister effect is displayed even in the absence of a membrane-bound ionophore, which leads to an even greater sensitivity to chaotropes than kosmotropes. 35,36…”

Section: Hofmeister Seriesmentioning

confidence: 99%

Benchmarking the placement of hydrosulfide in the Hofmeister series using a bambus[6]uril-based ChemFET sensor

Kuhl,

Banning,

Fargher

et al. 2023

Chem. Sci.

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On the origin of the Hofmeister effect in anion-selective potentiometric electrodes with tetraalkylammonium salts

Cited by 21 publications

References 55 publications

All-Solid-State Potentiometric Sensor Based on Graphene Oxide as Ion-to-Electron Transducer for Nitrate Detection in Water Samples

All-Solid-State Potentiometric Sensor Based on Graphene Oxide as Ion-to-Electron Transducer for Nitrate Detection in Water Samples

Hofmeister Effects Shine in Nanoscience

Benchmarking the placement of hydrosulfide in the Hofmeister series using a bambus[6]uril-based ChemFET sensor

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