Chloride-selective liquid-membrane electrodes based on lipophilic methyl-tri-N-alkyl-ammonium compounds and their applicability to blood serum measurements

Hartman, Keith B.; Luterotti, Svjetlana; Oßwald, H.; Oehme, Michael; Meier, P C; Ammann, D.; Simon, W.

doi:10.1007/bf01201614

Cited by 38 publications

(17 citation statements)

References 19 publications

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“…For exploratory potentiometric studies on anion-selective properties of vitamin B,, derivatives in membranes, the lipophilic Co(II1)-complex 1 was prepared. This was followed by the synthesis of 2 and 3, which were used for an evaluation of structural effects and for comparison with Rktey's cholestano-cobaloxime 4 (chlorobis(cholestane-2,3-dione dioxime)pyridinecobalt) [6] and the quarternary ammonium salt 5 [7]. The lipophilic Co(II1)-cobyrinate octadecyl-cobester 1 (a,b,d,ef,g-hexamethyl c-octadecyl Coa,Cofi-dicyanocobyrinate) was prepared by a sequence of four steps from vitamin B,, via vitamin-B,,-c-lactone ).…”

Section: Discussionmentioning

confidence: 99%

A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions

Schulthess

Ammann

Simon

et al. 1984

Helvetica Chimica Acta

123

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SummaryIncorporation of the lipophilic Co(I1I)-cobyrinate octadecyl-cobester 1 and of its ionic aqua-cyano perchlorate derivative 2 into poly(viny1 chloride)/bis(l-butylpentyl) adipate liquid membranes induces a selectivity, measured potentiometrically, of about lo3 for SCN-and NO; with respect to Cl-, but only of about 4 for C10; us. C1-. This is in contrast to classical anion-exchanger membranes, which exhibit a selectivity sequence C10; > SCN->> NO; > C1-in accordance with the Hofmeister series. The Co(1II)-corrins 1 and 2, when components in solvent polymeric membranes, undergo exchange of axial ligands and behave as highly selective carriers for SCN-and NO;.An anion-selectivity sequence with a preference for lipophilic and a rejection of hydrophilic anions [ 11 is characteristic of liquid membranes based on various classical anion exchangers [2] such as quarternary ammonium salts or metal-phenanthrolinates (Hofmeister series [3]). For dissociated anion exchangers, where the complexation between the cationic sites and the counterions is negligible, the anion selectivity is controlled by the distribution coefficients of the anions between the aqueous sample phase and the membrane phase [1] [4]. A different behaviour is expected for associated anion exchangers. In this case, the parameters determining the selectivity strongly depend on the stability constants of the complexes of the exchanger sites with the counterions, provided that the mobilities of these sites are large compared to those of the counterions [1][4]. During our search for components with a selective interaction between cationic sites and counterions, vitamin B,, and its derivatives appeared as promising candidates. This was supported by the available information on their complexation behaviour towards anionic ligands in aqueous solutions [5]. For exploratory potentiometric studies on anion-selective properties of vitamin B,, derivatives in membranes, the lipophilic Co(II1)-complex 1 was prepared. This was followed by the synthesis of 2 and 3, which were used for an evaluation of structural effects and for comparison with Rktey's cholestano-cobaloxime 4 (chlorobis(cholestane-2,3-dione dioxime)pyridinecobalt) [6]

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Section: Discussionmentioning

confidence: 99%

A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions

Schulthess

Ammann

Simon

et al. 1984

Helvetica Chimica Acta

123

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“…23 The potential of the following cell kept at 25 C was used for the potentiometric determination of ClO4 -: Ag/AgCl | NaCl (satd.) || sample solution | membrane | 10 -2 mol L -1 NaCl and NaClO4, phosphate buffer (pH 6.8) | Ag/AgCl A saturated NaCl solution instead of KCl was used for the salt bridge, in order to avoid possible precipitation of KClO4.…”

Section: Methodsmentioning

confidence: 99%

Perchlorate Selectivity of Anion Exchange Resins as Evaluated Using Ion-Selective Electrodes

et al. 2017

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“…In the present work, trihexadecylmethylammonium chloride (THMACl) is used as an ion-exchanger in POT membranes. THMACl was chosen due to its long alkyl chains, which should make it more lipophilic than TDMACl [12]. The increased lipophilicity of the ion-exchanger should result in diminished leaching of the component into the aqueous phase and a better durability of the membrane.…”

Section: Introductionmentioning

confidence: 99%

All‐Solid‐State Chloride Sensors with Poly(3‐Octylthiopene) Matrix and Trihexadecylmethylammonium Chlorides as an Ion Exchanger Salt

Sjöberg-Eerola¹,

Bobacka

Sokalski

et al. 2004

Electroanalysis

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All-solid-state chloride sensors were prepared by incorporation of trihexadecyl-methylammonium chloride (THMACl) as an ion-exchanger salt into a conjugated polymer membrane, poly(3-octylthiophene) (POT). The influence of additional membrane components, such as a lipophilic anion, (potassium tetrakis[3,5-bis(trifluoromethyl)phenyl] borate), poly(vinyl chloride) (PVC) or a plasticizer, (2-nitrophenyl octyl ether) were studied. The membrane components were dissolved in chloroform except for PVC, which was dissolved in tetrahydrofuran (THF). The membrane solution was deposited on glassy carbon (GC) by solution casting resulting in all-solid-state chloride sensors. The sensor characteristics were determined potentiometrically and with impedance spectroscopy. The addition of plasticizer was found to be crucial in obtaining a well functioning Cl À -ISE based on POT and THMACl.

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Chloride-selective liquid-membrane electrodes based on lipophilic methyl-tri-N-alkyl-ammonium compounds and their applicability to blood serum measurements

Cited by 38 publications

References 19 publications

A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions

A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions

Perchlorate Selectivity of Anion Exchange Resins as Evaluated Using Ion-Selective Electrodes

All‐Solid‐State Chloride Sensors with Poly(3‐Octylthiopene) Matrix and Trihexadecylmethylammonium Chlorides as an Ion Exchanger Salt

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Chloride-selective liquid-membrane electrodes based on lipophilic methyl-tri-N-alkyl-ammonium compounds and their applicability to blood serum measurements

Cited by 38 publications

References 19 publications

A Lipophilic Derivative of Vitamin B12 as Selective Carrier for Anions

A Lipophilic Derivative of Vitamin B12 as Selective Carrier for Anions

Perchlorate Selectivity of Anion Exchange Resins as Evaluated Using Ion-Selective Electrodes

All‐Solid‐State Chloride Sensors with Poly(3‐Octylthiopene) Matrix and Trihexadecylmethylammonium Chlorides as an Ion Exchanger Salt

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A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions

A Lipophilic Derivative of Vitamin B₁₂ as Selective Carrier for Anions