Samarium(III)-Selective Electrode Using Neutral Bis(thiaalkylxanthato)alkanes

Abstract

Samarium(III)-selective electrodes constructed on the basis of bis(alkylxanthato)alkanes and bis(thiaalkylxanthato)alkanes are described. As a class, both types of compounds showed quantitative responses toward Sm-(III) ion. Among the ionophores tested in this work, the neutral carrier, 1,4-bis(3-thiapentylxanthato)butane, provided an ion-selective electrode almost ideal for determination of Sm(III) in aqueous solution. This electrode exhibits a Nernstian slope of 20 mV per concentration decade, with a detection limit of 5.0 × 10 -7 M Sm(NO 3 ) 3 . Acceptable selectivity was obtained for Sm(III) determination against many of the transition, alkali, alkalineearth, and some of the lighter rare-earth metal ions. Only Cu(II) and Fe(III) interfere seriously.

Determination of Apparent Formation Constants of Eu(III) with Humic Substances by Ion Selective Liquid Membrane Electrode

“…Potentiometric titration using an ISE is a very conventional approach that is used to directly and easily measure the activity of free (uncomplexed) metal ions. Although a few ion-selective electrodes have been developed for the potentiometric determination of trivalent lanthanide and actinide ions [13][14][15][16], no application to determine the formation constant has been reported. Recently, we developed a novel technique to determine the formation constants of trivalent metal ions with carboxylic acid electrochemically, using a liquid membrane electrode [17,18].…”

Fabrication of a new samarium(III) ion-selective electrode based on 3-{[2-oxo-1(2h)-acenaphthylenyliden]amino}-2-thioxo -1,3-thiazolidin-4-one

“…[16][17][18][19] In addition, potentiometry with ion selective electrode has also been applied, for the same purpose since it presents the advantages of simplicity, high detection speed, and low cost. [20][21][22][23][24][25] In this study a new ion selective sensor to determine Sm 3+ is introduced. Several highly selective and sensitive membrane sensors for alkaline earth and transition metal ions have been reported.…”

Thulium(III) Ions Monitoring by a Novel Thulium(III) Microelectrode Based on a S‐N Schiff Base

“…Although the neutral carrier-type ISEs have been successful for the determination of a wide variety of metal ions [5], including the alkali, alkaline-earth, transition and some other heavy metal ions, there are only a limited number of reports on the development of highly selective electrodes for eleven lanthanide ions based on different noncyclic and macrocyclic ionophores such as (2-mercaptoanil)diacetyl [6], aza-crown [7], dicyclohexano-18-crown-6 [8], 1,3,5-trithiacyclohexane [9], N-N Schiffs base [10], bis(thiophenal)phenylen-1,3-diamine [11], 1-phenyl-3-methyl-4-octadecanoyl-5-pyrazolone [12], 4-methyl-2-hydrazinobenzo-thiazole [13], 5,14-N,N'-hydroxyphenyl-4,15-dioxo-1,5,14,18-tetraaza hexacosane [14], on N-(2-pyridyl)-N'-(2-methoxyphenyl)-thiourea [15], gliclazide [16] and bis(5-nitro-2-furaldehyde)butane-2,3-dihydrazone [17] for lanthanum, 1,3,5-trithiane [18,19], azomethine [20] and N'-[(2-Hydroxyphenyl) methylidene]-2-furohydrazide [21] for cerium, bis(thiaalkylxanthato)alkanes [22], glipizide [23,24] for samarium, omeprazole [25] S-N Schiffs base [26] and N-(2-pyridyl)-N'-(4-nitrophenyl)thiourea [27] for gadolinium, N-(2-pyridyl)-N'-(2-methoxyphenyl)-thiourea [28], (3-hydroxy-N'-[(2-hydrox yphenyl) methylene]-2-naphthohydrazide [29], and cefixime [30] for ytterbium, N,N-diethyl-N-(4-hydroxy-6-methylpyridin-2-yl)guanidine [31] and S-N hexadentates Schiffs base [32] for europium, bispyrrolidene Schiffs base [33] for terbium, bis-pyrrolidene Schiffs base [34] and asymmetrical Schiffs base [35] for dysprosium, N'-(2-hydroxy-1,2-diphenylethylidene) benzohydrazide [36] for erbium, N-(1-thien-2-ylmethylene)-1,3-benzothiazol-2-amine [37] and N,N'-bis(2-quinolinecar...…”