Flow-Injection Potentiometry by Poly(vinyl chloride)-Membrane Electrodes with Diphosphoryl-dicarboxylicacid-p-tert-butylcalix[4] arene Ionophore for the Determination of Th(IV) Ions

Mizani, Farhang; Shamsipur, Mojtaba; Yaftian, Mohammad Reza; Matt, Dominique

doi:10.2116/analsci.29.361

Cited by 9 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detection limit (which is defined as the Th 4+ concentration corresponding to three times the standard deviation of blank signal) of the sensor was 0.45 nM in a 10 min electrical recording. To the best of our knowledge, such a detection limit, although not as impressive as that (20 pM) of ICPMS, is much better than those (ranging from 2 nM to 2.02 μM) of various other sensitive thorium detection methods − (Supporting Information, Table S1). This detection limit is more than good enough for analysis of thorium in environmental samples (note that the World Health Organization’s thorium concentration limit in drinking water is <1.06 μM).…”

Section: Resultsmentioning

confidence: 80%

“…If so, to detect such material production and weapon development activities are critical to nonproliferation. Thus far, various analytical techniques have been utilized for thorium detection, including flow-injection analysis, inductively coupled plasma mass spectrometry (ICPMS), neutron activation analysis (NAA), as well as spectrophotometric, fluorimetric, electrochemical, and radiometric methods. However, most of these techniques are laborious (e.g., involving with time-consuming preconcentration and/or radiochemical separation procedures) and require the use of expensive and sophisticated instruments.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Computation-Assisted Nanopore Detection of Thorium Ions

et al. 2018

View full text Add to dashboard Cite

Thorium is a well-known radioactive and chemically toxic contaminant in the environment. The continuous exposure to thorium may cause an increased risk of developing lung and liver diseases as well as lung, pancreas, and bone cancer. Due to its use in nuclear industry and other industrial applications, thorium may be accidentally released to the environment from its mining and processing plants. In this work, we developed a rapid, real-time, and label-free nanopore sensor for Th detection by using an aspartic acid containing peptide as a chelating agent and tuning the electrolyte solution pH to control the net charges of the peptide ligand and its metal ion complex. The method is highly sensitive with a detection limit of 0.45 nM. Furthermore, the sensor is selective: other metal ions (e.g., UO, Pb, Cu, Ni, Hg, Zn, As, Mg, and Ca) with concentrations of up to 3 orders of magnitude greater than that of Th would not interfere with Thdetection. In addition, simulated water samples were successfully analyzed. Our developed computation-assisted sensing strategy should find useful applications in the development of nanopore sensors for other metal ions.

show abstract

Section: Resultsmentioning

confidence: 80%

mentioning

confidence: 99%

Computation-Assisted Nanopore Detection of Thorium Ions

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In this regard, ion selective electrodes (ISEs) represent a good candidate for thorium monitoring owing to the advantages of low cost, fast analysis, high performance, low maintenance, no sample pretreatment, and the possibility of miniaturization and integration into standalone sensing units [28]. Even though some attention has been paid to the potentiometric monitoring of thorium ions, only a few reports are available in the literature and thus the need for more ISEs is notable [29][30][31][32][33][34]. A number of ionophores have been introduced for the fabrication of thorium ISEs including 2-(diphenyl phosphorothioyl)-N′,N′-diphenyl acetamide [29], calix [4]arenes [30,31], dibutyl(8-hydroxyquinolin-2-yl) methylphosphonate [27], Aliquat-336 [32], dithio-tetraaza macrocyclic compound [33], morpholine derivative [34], and thorium oxinate [35].…”

Section: Introductionmentioning

confidence: 99%

“…Even though some attention has been paid to the potentiometric monitoring of thorium ions, only a few reports are available in the literature and thus the need for more ISEs is notable [29][30][31][32][33][34]. A number of ionophores have been introduced for the fabrication of thorium ISEs including 2-(diphenyl phosphorothioyl)-N′,N′-diphenyl acetamide [29], calix [4]arenes [30,31], dibutyl(8-hydroxyquinolin-2-yl) methylphosphonate [27], Aliquat-336 [32], dithio-tetraaza macrocyclic compound [33], morpholine derivative [34], and thorium oxinate [35].…”

Section: Introductionmentioning

confidence: 99%

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Akl

Ali

2022

J IRAN CHEM SOC

View full text Add to dashboard Cite

The radioactive and hazardous nature of thorium demands the fabrication of efficient electrodes for its sensitive and selective monitoring in aqueous environments. The present paper reports the construction and characterization of a new carbon paste electrode (CPE) chemically modified by octyl phenyl acid phosphate (OPAP) as a selective recognition agent for the potentiometric assay of thorium(IV) ions. Improved sensitivity, electrical conductivity, and selectivity were achieved by incorporating oxidized multi-walled carbon nanotubes (o-MWCNTs) into the carbon paste composition. The electrochemical performance of the developed electrode was evaluated regarding the paste ingredients, response time, and working pH range. The standard CPE potentials, E°, were determined at various temperatures and the isothermal temperature coefficient was calculated. The optimized CPE showed a Nernstian slope of 14.65 ± 0.38 mV decade−1 over the concentration range of 4.82 × 10–7–1.00 × 10–1 mol L−1. The electrode possessed a short response time (9 s), independence of the solution pH over the range of 2.5–5.5, and a relatively long operational lifetime (˃ 3 months). The selectivity coefficients indicated the good discrimination ability of the developed CPE towards thorium(IV) ion compared to various common ions. Aiming to judge the practical utility of the developed CPE, it was successfully used for the potentiometric analysis of thorium(IV) ions in various real aqueous matrices with sensible results.

show abstract

“…Plasticized PVC membranes are typical materials used for developing chemical sensors. [13][14][15][16][17][18][19][20] The sensing principle of this optode membrane ion sensor involves the detection of the refractive index change 21 and color change of a lipophilic dye in a base material of PhC (PVC) by ion extraction. Subsequently, the diffraction intensity change caused by ion extraction into the PhC is observed.…”

Section: Introductionmentioning

confidence: 99%

Origin of the Optical Response of a Dye-doped Plasticized Poly(vinyl chloride)-based Photonic Crystal Ion Sensor

et al. 2017

View full text Add to dashboard Cite

We investigated the origin of the optical responses of a two-dimensional photonic crystal (2D-PhC) optode membrane ion sensor based on plasticized poly(vinyl chloride) (PVC) containing lipophilic dye. We previously developed a highly sensitive potassium ion sensor. However, the contributions of various factors to the sensor's optical response could not be distinguished. Here, we synthesized a lipophilic dye with spectral changes that do not overlap with those of propagated light in the PhC. Using this synthesized dye excluded the contribution of light absorption by the dye to the peak intensity change of the ion sensor. In refractive index standard solutions, the bulk refractive index change upon ion extraction contributed negligibly. The contribution of diffracted light scattering by optical transparency change of the plasticized PVC upon ion extraction accounted for approximately 45% of the ion sensor's total response. These findings are important for the development of highly sensitive plasticized PVC-based 2D-PhC ion sensors.

show abstract

Flow-Injection Potentiometry by Poly(vinyl chloride)-Membrane Electrodes with Diphosphoryl-dicarboxylicacid-p-tert-butylcalix[4] arene Ionophore for the Determination of Th(IV) Ions

Cited by 9 publications

References 37 publications

Computation-Assisted Nanopore Detection of Thorium Ions

Computation-Assisted Nanopore Detection of Thorium Ions

Direct analysis of thorium(IV) ions concentration in water samples using a new carbon paste electrode

Origin of the Optical Response of a Dye-doped Plasticized Poly(vinyl chloride)-based Photonic Crystal Ion Sensor

Contact Info

Product

Resources

About