Selectivity of chloride ion selective polymeric-membrane electrodes based on quaternary ammonium salts.

Shibata, Yasuhisa; Ozawa, Shoji; Oki, Naoto; Miyagi, Hiroyuki

doi:10.2116/bunsekikagaku.41.5

Cited by 3 publications

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“…The chain length of the methyltrialkylammonium salt showed a characteristic effect on the selectivity, which is similar to that observed for tetraalkylammonium salts. 13 Note that the selectivity pattern differs somewhat from the one reported earlier, 14 because in this study the ISEs were conditioned with serum prior to use. For the lipophilic anions such as thiocyanate, perchlorate, and nitrate, the selectivity coefficient decreased (hence, the selectivity improved) as the chain length (n) was increased from 12 to 16, but then it increased slightly at n ) 18.…”

Section: Resultsmentioning

confidence: 64%

“…Such an effect may be related to the molecular size of the ligand, as has been suggested for the tetraalkylammonium-type ligands. 13 Precision. The significance of the improved selectivity was confirmed by applying the ISEs to blood serum sample measurements.…”

Section: Resultsmentioning

confidence: 99%

“…An annealed polyion complex membrane prepared from a cation-exchange polymer and excessive quaternary ammonium , reportedly exhibited high Cl - selectivity at temperatures below the transition temperature. Certain plasticizers also appear to induce similar effects. , With a combination of higher aliphatic alcohol − and ligands of a tetraalkylammonium type, we have observed significant improvement in the Cl - selectivity over lipophilic anions and organic acid ions, especially when the alkyl chain length of the ligand was longer than 14. , However, the electrodes based on such long-chain tetraalkylammoniums generally show high impedance, so a high level of expertise is needed to exploit the potential of the ligands.…”

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confidence: 83%

“…Electrode Systems. The above quaternary ammonium salts were incorporated into ion-selective membranes by using a higher aliphatic alcohol as a plasticizer, according to the conventional method described elsewhere. , To accelerate the response time, o -nitrophenyl octyl ether was used as an additional membrane component. The membranes were adhered either onto an open end of a stick-type electrode body or onto a flow-through-type electrode body.…”

Section: Methodsmentioning

confidence: 99%

“…4,5 With a combination of higher aliphatic alcohol [9][10][11][12] and ligands of a tetraalkylammonium type, 5 we have observed significant improvement in the Clselectivity over lipophilic anions and organic acid ions, especially when the alkyl chain length of the ligand was longer than 14. 13,14 However, the electrodes based on such long-chain tetraalkylammoniums generally show high impedance, so a high level of expertise is needed to exploit the potential of the ligands.…”

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confidence: 99%

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Anion-Selective Electrodes Based on Long-Chain Methyltrialkylammonium Salts

et al. 1996

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A new series of methyltrialkylammonium salts with an alkyl chain length (n) longer than the conventional methyltridodecylammonium (MTDDA, n = 12) has been developed, and these materials were examined for use as the ion-sensing component (ligand) in anion-selective electrodes (ISEs). Syntheses of the higher ammoniums with n = 16, 18, and 20 were carried out. In combination with an alcoholic plasticizer, the ammoniums with n = 12, 16, and 18 led to ISEs with fundamental characteristics, such as slope sensitivity, impedance, and time response, that were sufficient for practical applications. Compared with the conventional MTDDA, the ISEs based on the ligands of n = 16 and 18 showed marked improvement in chloride selectivity over both lipophilic and hydrophilic anions, deviating from the Hofmeister regime in some cases. Taking perchlorate as an example, the magnitude of the improvement was a factor of 20 for n = 16 and 15 for n = 18. When the new ISEs were applied to chloride analysis in blood serum, they improved the accuracy by a factor of 2-6. Therefore, the methyltrialkylammonium salts with alkyl chain lengths of 16 and 18 offer definite advantages over the conventional alternative and are strong candidates to become the standard compounds for use in future chloride ISEs.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

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confidence: 83%

Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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Anion-Selective Electrodes Based on Long-Chain Methyltrialkylammonium Salts

et al. 1996

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Sensing of Poly(styrenesulfonate)s by Polymeric Membrane Electrodes Based on Liquid Anion-Exchangers

Ohki¹,

Tsurugasaki²,

Kondo³

et al. 1997

Bulletin of the Chemical Society of Japan

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The potentiometric responses of ion-selective electrodes (ISEs) based on various liquid anion-exchangers for poly(styrenesulfonate)s (PSSs) were examined. The liquid anion-exchangers included lipophilic monoammonium, monophosphonium, diphosphonium, and triphosphonium salts. The molecular weights of PSSs, which had narrow molecular-weight distributions (Mw/Mn < 1.2), were varied from 1.8 × 103 (PSS-1.8K) to 3.5 × 104 (PSS-35K). For PSS-1.8K, ISEs based on diphosphonium salts, polymethylenebis(trioctylphosphonium) dibromides 1—3, exhibited good responses, the response slope and linear response range being −20 to −21 mV/decade and 5.0 × 10−5—5.0 × 10−3equiv dm−3, respectively. As the molecular weight of PSS was increased, the linear response range became smaller, while the response slope was almost constant. Finally, PSS-35K gave almost no response. On the other hand, a wide molecular-weight distribution PSS (Mw/Mn = 3.6) provided a good response, although it had a high average molecular weight (Mw = 1.6 × 104). The selectivity coefficients for PSS over various anions of ISEs, based on diphosphonium and monophosphonium salts, were assessed.

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Determination of Ethanol in Sake Mash by a Chloride Ion-Selective Electrode.

Tsukatani

Toko

1999

FSTR

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Selectivity of chloride ion selective polymeric-membrane electrodes based on quaternary ammonium salts.

Cited by 3 publications

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Anion-Selective Electrodes Based on Long-Chain Methyltrialkylammonium Salts

Anion-Selective Electrodes Based on Long-Chain Methyltrialkylammonium Salts

Sensing of Poly(styrenesulfonate)s by Polymeric Membrane Electrodes Based on Liquid Anion-Exchangers

Determination of Ethanol in Sake Mash by a Chloride Ion-Selective Electrode.

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