A double-membrane ion-selective electrode for the potentiometric determination of potassium

Diaz, Carmelo; Vidal, Juan C.; Galbán, Javier; Urarte, Maria L.; Lanaja, Javier

doi:10.1016/0026-265x(89)90048-9

Cited by 15 publications

(7 citation statements)

References 17 publications

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“…355 Some monocyclic polyethers have been used in the preparation of ISFETs 356 and coated wire electrodes. 357 In comparison, results with 1,4cubyl diester-25-crown-7 ethers reported recently are not too encouraging (log K K,Na pot > -1.6). 358…”

Section: K + Sensorsmentioning

confidence: 83%

“…Improvements in detection limits and selectivities were also found when the benzo-15-crown-5 ring was covalently attached to carboxylated PVC (log (FIM): −2.0 with free ionophore, −2.6 with covalently bound ionophore; KTpClPB, oNPOE, carboxylated PVC) . Some monocyclic polyethers have been used in the preparation of ISFETs and coated wire electrodes . In comparison, results with 1,4-cubyl diester-25-crown-7 ethers reported recently are not too encouraging (log > −1.6) …”

Section: K+ Sensorsmentioning

confidence: 87%

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Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

1998

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and 1991, respectively. He has been working in the field of chemical sensors since 1970. Further topics of his interest are spectroscopic databases, automatic spectra interpretation, and modeling of structure−property relationships. He has published over 180 papers and 7 books. Current activities in the fields of chemical sensors and computer-aided analytical chemistry are documented on the web page http://www/ceac.ethz.ch/pretsch/. His e-mail address is pretsch@ org.chem.ethz.ch.

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Section: K + Sensorsmentioning

confidence: 83%

Section: K+ Sensorsmentioning

confidence: 87%

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

1998

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“…Many analytical methods have been developed for the analysis of MCP, most based on spectrophotometric [2][3][4][5][6][7][8][9][10][11][12][13], flourometric [14][15][16], 1 H NMR spectroscopic [17], chromatographic techniques [18][19][20][21][22][23][24][25][26][27][28], potentiometric [29][30][31], capillary electro phoresis [32] and radio immunoassay [33]. Most of these methods are complicated and need sophisticated instrumentation such as HPLC or spectrophotometry.…”

Section: Introductionmentioning

confidence: 99%

Square wave anodic stripping voltammetric determination of metoclopramide in tablet and urine at carbon paste electrode

Farghaly

Taher

Naggar

et al. 2005

Journal of Pharmaceutical and Biomedical Analysis

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“…The proposed K + ISE exhibits good selectivity compared with previously described sensors 8,[22][23][24][25][26] (Table 3). It exhibits a better working concentration range, slope and potentiometric selectivity for K + over many cations.…”

Section: Potentiometric Selectivitymentioning

confidence: 75%

Triethylene Glycol Ether End-grafted Carbosilane Dendrimer: A Potential Ionophore for Potassium Ion Recognition

2006

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Ion-selective electrodes have many advantages in the ion activity determining process, i.e., direct and real-time monitoring of samples is possible. The key ingredient of plasticized PVC membranes is the incorporated ionophore, which defines the selectivity of the electrodes via selective complex formation with the cation of interest. The design and synthesis of neutral carriers/ionophores have become important in the field of host-guest chemistry. The most widely used ionselective electrode (ISE) for determining potassium is based on antibiotic valinomycin.1 Other carriers including crown ethers 2-5 substituted ethers of tetraethyleneglycol, 6 organo-phosphine ligands 7 and polymer supported liquid crystal membranes 8 have also been successfully applied as carriers for constructing potassium ISEs.The incorporation of crown ether groups into self-assembled monolayers (SAMs) and their potential use as metal-ion sensors was reported. 9,10 We recently prepared TEG (triethylene glycol monomethyl ether)-and PEG (polyethylene glycol monomethyl ether)-end-grafted carbosiloxane and carbosilane dendrimers and studied their ability to detect alkali metal-ion binding. 11 The general idea was to use the glycols to form ion binding domains at the periphery (similar to crown ethers) via self assembly. Apart from the ionophore topology, other membrane constituents, such as additive and plasticizers, also play a vital role in the performance of an ion sensor.Brodbelt et al. first described the use of electrospray ionization mass spectrometry (ESI-MS) as an easy way to obtain, in general, information about binding selectivities in host-guest compounds, such as crown ether or cryptand metal complexes.12,13 The minimal sample consumption and the rapid feedback are the advantages of this method. The obtained results could provide essential information regarding the use of compounds as potential ionophore in ion-selective electrodes (ISEs).In this publication, we describe the use of ESI-TOF mass spectrometry for preliminary screening a triethylene glycolfunctionalized carbosilane for the selective complexation of alkali metal ions.Based on information from mass spectrometric studies, we decided to use Si[CH2CH2CH2-Si(Me)2CH2CH2CH2(OCH2CH2)3Me]4 (1) as an ionophore in the fabrication of a PVC-based membrane electrode. We already reported on the synthesis and characterization of 1 in an earlier publication.11 Carbosilane dendrimers are expected to have high selectivity probably due to the fact that they are very stable towards hydrolysis, which makes them more suitable to be used as ionophores. The number of alkaline metal cations that can be coordinated depends on the number of peripheric TEG groups attached to the carbosilane. This paper reports on the cation selective properties and potentiometric response characteristics of 1 with various membrane components. The results indicate that the electrode offers a wide linear response range, and high selectivity and sensitivity to potassium. ExperimentalReagents and equipment ESI-TOF exp...

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A double-membrane ion-selective electrode for the potentiometric determination of potassium

Cited by 15 publications

References 17 publications

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

Carrier-Based Ion-Selective Electrodes and Bulk Optodes. 2. Ionophores for Potentiometric and Optical Sensors

Square wave anodic stripping voltammetric determination of metoclopramide in tablet and urine at carbon paste electrode

Triethylene Glycol Ether End-grafted Carbosilane Dendrimer: A Potential Ionophore for Potassium Ion Recognition

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