Novel Thallium(I)-Selective Membrane Electrode Based on a Podal Ligand

doi:10.5012/bkcs.2003.24.11.1585

Bulletin of the Korean Chemical Society

2003

DOI: 10.5012/bkcs.2003.24.11.1585

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Novel Thallium(I)-Selective Membrane Electrode Based on a Podal Ligand

Abstract: A PVC-based membrane electrode for thallium(I) ions based on 1, 21,23,25-tetramethyl-2,20: 3,19-dimetheno-[H, 2] , and a detection limit 5.0 × 10 −6 M. It has a very fast response time of <10 s and can be used for at least ten weeks without a considerable divergence in potentials. This electrode revealed comparatively good selectivity with respect to alkali, alkaline earth, and some transition and heavy metal ions and was effective in a pH range of 2.0-10.0. It was used as an indicator electrode in potentiom… Show more

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Cited by 10 publications

References 19 publications

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Novel Thallium(I)‐Selective Membrane Electrode Based on a Podal Ligand.

et al. 2004

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Multi-membered O,S-heterocycles R 0691 Novel Thallium(I)-Selective Membrane Electrode Based on a Podal Ligand. -A PVC-based membrane electrode for thallium(I) ions based on compound (I) is prepared starting from resorcinol. -(GANJALI*, M. R.; POURJAVID, M. R.; MOURADZADEGUN, A.; HOSSEINI, M.; MIZANI, F.; Bull. Korean Chem. Soc. 24 (2003) 11, 1585-1589; Dep. Chem., Fac. Pharm., Tehran Univ., Tehran, Iran; Eng.) -R. Langenstrassen 17-168

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Novel Thallium(I)‐Selective Membrane Electrode Based on a Podal Ligand.

et al. 2004

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Construction of a Highly Selective and Sensitive La(III) Sensor Based on N‐(2‐Pyridyl)‐N′‐(4‐methoxyphenyl)‐thiourea for Nano Level Monitoring of La(III) Ions

et al. 2006

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N-(2-Pyridyl)-N'-(4-methoxyphenyl)-thiourea (PMPT) was found to be a suitable neutral ion carrier for the construction of a highly selective and sensitive La(III) membrane sensor. Poly(vinyl chloride) (PVC) based membranes of PMPT with potassium tetrakis (p-chlorophenyl) borate (KTpClPB) as an anionic excluder and oleic acid (OA), dibutyl phthalate (DBP), benzyl acetate (BA) and o-nitrophenyloctyl ether (NPOE) as plasticizing solvent mediators were constructed and investigated as La(III) membrane sensors. A membrane composed of PMPT-PVCKTpClPB-BA with the ratio 8.0 : 35.0 : 3.0 : 54.0 works well over a very wide concentration range (4.0 Â 10 À8 to 1.0 Â 10 À1 M) with a Nernstian slope of 19.6 AE 0.2 mV per decade of activity between pH values of 4.0 and 9.0. The detection limit of the sensor was calculated to be 2.0 Â 10 À8 M (ca. 3.0 ppb). The sensor displays very good discrimination toward La(III) ions with regard to most common metal ions and lanthanide ions. The proposed sensor shows a short response time for whole concentration range (ca. 12 s). For evaluation of the analytical applicability of the La(III) sensor, it was successfully used as an indicator electrode for the titration of La(III) ions with EDTA. It was also applied to the determination of fluoride content of two mouth wash preparation samples and monitoring of La(III) ions in some binary and ternary mixtures.

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Determining the fluxes of Tl+ and K+ at the root surface of wheat and canola using Tl(I) and K ion-selective microelectrodes

2010

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The objectives of this study were to develop and evaluate a Tl + ion-selective microelectrode (ISME) and to determine the basis for observed differences in Tl accumulation by durum wheat (Triticum turgidum L. var 'Kyle') and spring canola (Brassica napus L. cv 'Hyola 401'). Seedlings were grown hydroponically and fluxes of K + and Tl + were measured at the root surface in solutions containing 5 μM Tl + or 3 mM K + . After testing two different Tl (I) ionophores, a functional Tl + ISME was developed from calix[4]arene tetra-n-propyl ether which had a detection limit of 2.5 µM and a slope of 56.6 mV/dec. Measurements of Tl + flux indicate that Tl + efflux occurred within 300-500 µm of the root tip, and influx farther from the root tip. Compared with canola, wheat had a slightly larger region of efflux and a smaller region of maximal influx, resulting in flux per root branch that was 2.3 to 4 times greater in canola than in wheat. The magnitude and pattern of K + fluxes by the two species were more similar. Our results indicate that observed differences in Tl accumulation by wheat and canola are due both to differences in the magnitude of Tl flux per root branch of these species, and to differences in root morphology resulting in more root tips in canola than in wheat roots. Keywords Root morphology . Physiology . Competition . Trace element . Ion uptake Abbreviations ASET automated scanning electrode technique DBP dibutyl phthalate DBS dibutyl sebecate DBzDA18C6 dibenzyldiaza-18-crown-6 HDPE high density polyethylene ISE ion-selective electrode ISME ion selective microelectrode K, Tl, Me sum of all possible species of potassium, thallium, or other element, respectively K + , Tl + , Me z+ free ionic forms of potassium, thallium, or other element, respectively NaTPB sodium tetraphenylborate o-NPOE o-nitrophenol octyl ether PVC polyvinyl chloride SIET scanning ion electrode technique Plant Soil (2010) 335:299-310

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Novel Thallium(I)-Selective Membrane Electrode Based on a Podal Ligand

Cited by 10 publications

References 19 publications

Novel Thallium(I)‐Selective Membrane Electrode Based on a Podal Ligand.

Novel Thallium(I)‐Selective Membrane Electrode Based on a Podal Ligand.

Construction of a Highly Selective and Sensitive La(III) Sensor Based on N‐(2‐Pyridyl)‐N′‐(4‐methoxyphenyl)‐thiourea for Nano Level Monitoring of La(III) Ions

Determining the fluxes of Tl+ and K+ at the root surface of wheat and canola using Tl(I) and K ion-selective microelectrodes

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