Recent trends in potentiometric sensor arrays—A review

Bratov, Andrey; Abramova, Natalia; Ipatov, Andrey

doi:10.1016/j.aca.2010.08.035

Cited by 221 publications

(94 citation statements)

References 178 publications

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“…Polymeric ion selective membranes play an important role in fields such as clinical diagnostics and environmental monitoring for the detection of small and hydrophilic ions such as sodium and chloride [1][2][3]. These membranes are frequently interrogated by the simplest electrochemistry technique, potentiometry, and are typically sensitive to ion activity changes in the sample solution [4].…”

Section: Introductionmentioning

confidence: 99%

All solid state chronopotentiometric ion-selective electrodes based on ferrocene functionalized PVC

Jarolímová

Crespo

Afshar

et al. 2013

Journal of Electroanalytical Chemistry

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a b s t r a c tAn all solid contact ion-selective electrode based on poly(vinyl chloride) covalently modified with ferrocene moieties allows one to operate the membrane in a chronopotentiometric sensing mode. The membrane is considered as initially non-perm-selective towards anions, and an applied anodic current provokes a defined anion flux in direction of the membrane. With this protocol, a variety of anions can be depleted at the membrane surface. Since this model system does not yet contain an ionophore, their order of preference follows the expected Hofmeister selectivity sequence. The all solid-state configuration tolerates an imposed current density of 1.4 lA mm À2 , which translates into an upper detection limit of ca. 1.2 mM. Higher current densities of up to 31.2 lA mm À2 are possible with addition of freely dissolved alkyl ferrocene derivative for an expected upper detection limit of 17.0 mM. Numerical simulations are performed in order to establish the fundamental basis of the mechanism that takes place in this all solid-state membrane electrode. The oxidation of bound Fc and the ion-transfer process are considered in the simulation. In view of developing an analytical sensor, different anions are tested. A linear range of two orders of magnitude from 0.01 to 1 mM is found. The membranes are evaluated over several days, displaying practically the same slopes and intercepts, with a RSD of less than 2%. Electrochemical limitations of free Fc and bound Fc are critical evaluated. This approach should allow one to develop a new family of solid-state chronopotentiometric ion sensors that require relatively high current densities.

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Section: Introductionmentioning

confidence: 99%

All solid state chronopotentiometric ion-selective electrodes based on ferrocene functionalized PVC

Jarolímová

Crespo

Afshar

et al. 2013

Journal of Electroanalytical Chemistry

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“…They rely on the concept of global selectivity, according to which the measurements yield a ''finger print'' of the liquid or vapor under study. Several kinds of sensing elements and detection methods have been studied for e-noses and mainly e-tongues [45,51,[57][58][59][60][61][62], which allow applicability in fields as food [57,[62][63][64][65][66], wines [67], water [68] and pharmaceutical analysis [66]. The importance of the e-tongues and e-noses to biosensing stems from the possible extension through the incorporation of sensing units capable of molecular recognition [69][70][71][72].…”

Section: Electronic Tongues and Nosesmentioning

confidence: 99%

Information Visualization to Enhance Sensitivity and Selectivity in Biosensing

Oliveira¹,

Pavinatto²,

Constantino³

et al. 2012

Biointerphases

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An overview is provided of the various methods for analyzing biosensing data, with emphasis on information visualization approaches such as multidimensional projection techniques. Emphasis is placed on the importance of data analysis methods, with a description of traditional techniques, including the advantages and limitations of linear and non-linear methods to generate layouts that emphasize similarity/dissimilarity relationships among data instances. Particularly important are recent methods that allow processing high-dimensional data, thus taking full advantage of the capabilities of modern equipment. In this area, now referred to as e-science, the choice of appropriate data analysis methods is crucial to enhance the sensitivity and selectivity of sensors and biosensors. Two types of systems deserving attention in this context are electronic noses and electronic tongues, which are made of sensor arrays whose electrical or electrochemical responses are combined to provide “finger print” information for aromas and tastes. Examples will also be given of unprecedented detection of tropical diseases, made possible with the use of multidimensional projection techniques. Furthermore, ways of using these techniques along with other information visualization methods to optimize biosensors will be discussed.

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“…Ion-selective electrodes (ISEs) are most widely used chemical sensors in clinical diagnostics, process control and environmental monitoring due to their intrinsic advantages including excellent selectivity, low cost, ease of use, and high reliability [1][2][3]. Among these, solid-contact ISEs which eliminate the internal solution and are easily miniaturized have been recognized as the means by which the next ISE generation will be constructed.…”

Section: Introductionmentioning

confidence: 99%

A simple approach for fabricating solid-contact ion-selective electrodes using nanomaterials as transducers

Liang

Yin

Qin

2015

Analytica Chimica Acta

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A general method for fabricating nanomaterials based solid-contact ISEs is developed. The mixture of an ionic liquid and a nanomaterial is used as intermediate layer.The detection limits of the proposed sensors are in the nanomolar range. The developed electrodes exhibit a good response time and excellent stability. A simple and robust approach for the development of solid-state ion-selective electrodes (ISEs) using nanomaterials as solid contacts is described. The electrodes are fabricated by using the mixture of an ionic liquid (IL) and a nanomaterial as intermediate layer, formed by melting the IL. Tetradodecylammonium tetrakis(4-chlorophenyl)borate (ETH 500) is chosen as an model of IL to provide strong adhesion between the inner glassy carbon electrode and the intermediate layer. Nanomaterials including single-walled carbon nanotubes (SWCNTs) and graphene were used as active ion-to-electron transducers between the glassy carbon electrode and the ionophore-doped ISE membrane. By using the proposed approach, the solid-contact Cu 2+ -and Pb 2+ -selective electrodes based on ETH 500/SWCNTs and ETH 500/ graphene as transducers, respectively, have been fabricated. The proposed electrodes show detection limits in the nanomolar range and exhibit a good response time and excellent stability.

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Recent trends in potentiometric sensor arrays—A review

Cited by 221 publications

References 178 publications

All solid state chronopotentiometric ion-selective electrodes based on ferrocene functionalized PVC

All solid state chronopotentiometric ion-selective electrodes based on ferrocene functionalized PVC

Information Visualization to Enhance Sensitivity and Selectivity in Biosensing

A simple approach for fabricating solid-contact ion-selective electrodes using nanomaterials as transducers

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