Nafion-coated uranyl selective electrode based on calixarene and tri-n-octyl phosphine oxide

Ramkumar, Jayshree; Maiti, B.

doi:10.1016/s0925-4005(03)00633-6

Cited by 29 publications

(11 citation statements)

References 19 publications

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“…Calculated selectivity coefficient values indicating an increased selectivity towards UO 2 2+ with increasing the anionic site amount in the membrane, where an optimal selectivity was obtained at 50 mol%. The selectivity coefficients have low values of 10 –4 or lower for the studied interfering ions, which are nearly equal to or greater than those reported for other UO 2 2+ ‐ISEs , . These results suggest that the formation constant of UO 2 ‐TTA complex is high compared to other interfering ions indicating a high tendency of HTTA towards UO 2 2+ .…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

Akl

2017

Electroanalysis

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A UO22+‐PVC membrane electrode was constructed using 2‐thenoyltrifluoroacetone as ionophore and its electrochemical response performance was characterized. The effect of membrane composition on the electrode performance was studied and best results were obtained using dioctylsebacate as a mediator and potassium tetrakis(4‐chlorophenyl)borate as anion excluder. The optimized UO22+‐sensor exhibited a Nernstian response with a slope of 29.5±0.5 mV decade−1 over the concentration range 5.0×10−7−1.0×10−1 mol L−1 at 25 °C with a detection limit of 3.1×10−7 mol L−1. The optimized electrode showed very good selectivity towards UO22+ relative to a wide variety of other cations and fast response time. Surface morphology of the optimized membrane electrode at different stages of its development and use was investigated and discussed. Quantum chemical calculations for geometrical optimization of the ionophore were carried out to investigate the interaction between the ionophore and UO22+ using DFT B3LYP/6‐31++G(d,p) level of theory and the obtained data confirmed the proposed response mechanism. The developed sensor was successfully applied for UO22+ selective determination in real water samples and the obtained results were compared to those obtained by spectrophotometric method indicating no significant difference.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

Akl

2017

Electroanalysis

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“…The membrane composition is well known to largely influence the response characteristics and working concentration ranges of both potentiometric [12][13][14][15][16][17][18][19][20][36][37][38][39][40][41][42][43][44][45] and optical sensors [21,22,44,46]. Thus, the composition of membrane was optimized by studying the influences of plasticizer/PVC ratio, the nature of plasticizer, the amounts of ionophore and chromoionophore and addition of NaTPB on the response behavior of the membrane sensor, and the results are summarized in Table 1.…”

Section: Effect Of Membrane Compositionmentioning

confidence: 99%

“…Moreover, due to relatively high mobility of uranium in surface and near surface environments, its measurements in trace levels in natural waters can be used as a basis for geochemical exploration and some industrial processes. Thus, during the past decade, several ion-selective electrodes based on a variety of suitable ionophores have been developed [12][13][14][15][16][17][18][19][20]. However, compared with uranyl-selective potentiometric sensors, work on ion-elective bulk optodes for uranyl ion has been quite sparse [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

A novel PVC-membrane optical sensor for highly sensitive and selective determination of UO22+ ion based on a recently synthesized benzo-substituted macrocyclic diamide and dibenzoylmethane

Shamsipur

Zargoosh

Mizani

et al. 2010

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Several analytical methods such as spectrophotometry, fluorimetry, etc. are used for the uranium determination but the potentiometric sensors based on ionophores-impregnated poly(vinyl chloride) membranes have the specific advantages of simplicity, selectivity, cost-effectiveness and non-destructive to measured samples [23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Development of potentiometric sensors for the selective determination of UO2 2+ ions

Zidan

Badr

Akl

2014

J Radioanal Nucl Chem

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The construction and performance characteristics of poly(vinyl chloride) membrane electrodes for uranyl ions based on dibutyl butyl phosphonate (L1) and di-n-octyl phenyl phosphonate (L2) as ionophores, are reported. The optimized membrane electrodes based on L1 and L2 exhibited a Nernstian response for uranyl ions over a concentration range of 5.0 9 10 -6 -1.0 9 10 -1 and 5.5 9 10 -5 -1.0 9 10 -1 mol L -1 in the pH range 2.1-3.4, with slopes of 28.6 and 29.7 mV decade -1 , respectively. The optimized electrodes exhibit good selectivity for UO 2 2? ions over a wide variety of other metal ions. The electrodes exhibit a fast dynamic response of *30 s. The developed sensors were used for potentiometric determination of uranyl ions concentration in different real samples and the obtained results agreed well with those obtained employing inductively coupled plasma optical emission spectrometer.

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Nafion-coated uranyl selective electrode based on calixarene and tri-n-octyl phosphine oxide

Cited by 29 publications

References 19 publications

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

Electrochemical Selective Determination of Uranyl Ions Using PVC Membrane Sensor

A novel PVC-membrane optical sensor for highly sensitive and selective determination of UO22+ ion based on a recently synthesized benzo-substituted macrocyclic diamide and dibenzoylmethane

Development of potentiometric sensors for the selective determination of UO2 2+ ions

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