Uranyl salophenes as ionophores for phosphate-selective electrodes

Citation
W. Wroblewski et al., Uranyl salophenes as ionophores for phosphate-selective electrodes, SENS ACTU-B, 68(1-3), 2000, pp. 313-318
Citations number
12
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS B-CHEMICAL
ISSN journal
09254005 → ACNP
Volume
68
Issue
1-3
Year of publication
2000
Pages
313 - 318
Database
ISI
SICI code
0925-4005(20000825)68:1-3<313:USAIFP>2.0.ZU;2-R
Abstract
Anion selectivities of poly(vinylchloride) (PVC) plasticized membranes cont aining uranyl salophene derivatives were presented. The influence of the me mbrane components (i.e. ionophore structure, dielectric constant and struct ure of plasticizer, the amount of incorporated ammonium salt) on its phosph ate selectivity was investigated. The highest selectivity for H2PO4- over o ther anions tested was obtained for lipophilic uranyl salophene III (withou t ortho-substituents) in PVC/o-nitrophenyl octylether (o-NPOE) membrane con taining 20 mol% of tetradecylammonium bromide (TDAB). Ion-selective electro des (ISEs) based on these membranes exhibited linear response in the range 1-4 of pH(2)PO(4)(-) with a slope of 59 mV/decade. The introduction of orth o-methoxy substituents in ionophore structure decreased the phosphate selec tivity of potentiometric sensors. (C) 2000 Elsevier Science S.A. All rights reserved.