Ion‐Selective Electrodes

Tani, Yukinori; Umezawa, Yoshio

doi:10.1081/e-esmc-120012872

Cited by 16 publications

(95 citation statements)

References 12 publications

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“…The research on fabrication of new ion sensors has caused a fundamental development in potentiometry over the past few decades [1,2]. Ion selective electrodes (ISEs) are well known and efficient tools for accurate and repeatable determination of various target molecules or ions in biological and industrial analysis.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

Khalil

El-aziz

2016

Electroanalysis

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Two novel carbon paste electrodes based on gentamicin‐reineckate (GNS‐RN)/multiwall carbon nanotubes (MWCNTs)/sodium tetraphenyl borate (NaTPB) or potassium tetraphenylborate (KTPB) for potentiometric determination of gentamicin sulfate were constructed. Our endeavors of lowering the detection limit for gentamicin ion‐selective electrodes were described. The paper focused on gentamicin carbon paste electrodes based on GNS‐RN as electroactive material, o‐nitrophenyloctyl ether (o‐NPOE) as plasticizer and incorporation of MWCNTs and lipophilic anionic additives (NaTPB and KTPB) which lower the detection limit of the electrodes showing best results for determination of gentamicin ion. The characteristics of the electrodes, GNS‐RN+NaTPB+MWCNTs (sensor 1) and GNS‐RN+KTPB+ MWCNTs (sensor 2), were measured, showing favorable features as they provided measurements of the potential with near‐Nernstian slopes of 29.6±0.3 and 29.1±0.3 mV/decade over the concentration range of 1.0×10−6–1.0×10−2 mol L−1 and pH ranges 3.0–8.2 and 3.0–8.0 in short response times (6.5 sec). Importantly, the electrodes had low detection limits of 3.0×10−7and 3.4×10−7 mol L−1 for the two sensors, respectively. The sensors showed high selectivity for gentamicin ion with respect to a large number of interfering species. The electrodes were successfully applied for the potentiometric determination of GNS ions in pure state, pharmaceutical preparations and human urine with high accuracy and precision. The results of this study were compared with some previously published data using other analytical methods.

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Section: Introductionmentioning

confidence: 99%

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

Khalil

El-aziz

2016

Electroanalysis

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“…22 For this purpose, the effects on ISEresponse according to its composition, inner solution, the presence of interfering ions, the concentration of ion pair in the membrane and polymer content (viscosity) of the membrane were studied experimentally. Six membrane compositions were prepared, Table 1.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Sensor for the Selective Determination of Prindopril Based on Phosphotungestic Acid Plastic Membrane

Zаrеh¹,

Wasel²,

Alkreem³

2013

Bulletin of the Korean Chemical Society

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A novel PVC membrane sensor for perindopril based on perindopril-phosphotungstate ion pair complex was prepared. The influence of membrane composition (i.e. percent of PVC, plasticizer, ion-pair complex, and kind of plasticizer), inner solution, pH of test solution and foreign cations on the electrode performance was investigated. The optimized membrane demonstrates Nernstian response (30.9 ± 1.0 mV per decade) for perindopril cations over a wide linear range from 9.0 × 10 −7 to 1 × 10 −2 M at 25 o C. The potentiometric response is independent of the pH in the range of 4.0-9.5. The proposed sensor has the advantages of easy preparation, fast response time. The selectivity coefficients indicate excellent selectivity for perindopril over many common cations (e.g., Na, rhamnose, maltose, glycine and benzamide. The practical applications of this electrode was demonstrated by measuring the concentrations of perindopril in pure solutions and pharmaceutical preparations with satisfactory results.

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“…1), a natural antibiotic agent that is practically only employed ionophore in NH 4 + -ISEs at present. 6,7 However, the selectivity of NH 4 + -ISEs based on nonactin is poor for NH 4 + relative to K + (log K pot NH4 + ,K + = -0.92), 8 therefore, the NH 4 + ion cannot be discriminated effectively from the K + ion. This limits its application to a low salt environment and produces the need for other treatments to avoid interference with K + ion.…”

Section: Introductionmentioning

confidence: 99%

Tetrahydrofuran-Containing Crown Ethers as Ionophores for NH⁺₄-Selective Electrodes

Jin¹,

Kim²,

Kim³

et al. 2004

Bulletin of the Korean Chemical Society

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), were prepared and the electrode characteristics were tested. The conditioned NH 4 + -ISEs (E1) based on L 1 with TEHP as a plasticising solvent mediator gave best results with near-Nernstian slope of 53.9 mV/decade of activity, detection limit of 10 −4.9 M, and enhanced selectivity coefficients for the NH 4 + ion with respect to an interfering K + ion (log K pot NH 4 + ,K + = -1.84). This result was compared to other ammonium ionophores reported previously, for example, that of nonactin (log K pot NH4 + ,K + = -0.92). The proposed electrode showed no significant potential changes in the range of 3.0 < pH < 9.0.

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Ion‐Selective Electrodes

Cited by 16 publications

References 12 publications

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

Electrochemical Sensor for the Selective Determination of Prindopril Based on Phosphotungestic Acid Plastic Membrane

Tetrahydrofuran-Containing Crown Ethers as Ionophores for NH⁺₄-Selective Electrodes

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Ion‐Selective Electrodes

Cited by 16 publications

References 12 publications

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

A New Approach for Decreasing the Detection Limit of Gentamicin Ion‐selective Electrodes by Incorporation of Multiwall Carbon Nanotubes (MWCNTs)/Lipophilic Anionic Additives

Electrochemical Sensor for the Selective Determination of Prindopril Based on Phosphotungestic Acid Plastic Membrane

Tetrahydrofuran-Containing Crown Ethers as Ionophores for NH+4-Selective Electrodes

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Tetrahydrofuran-Containing Crown Ethers as Ionophores for NH⁺₄-Selective Electrodes