Separation of Water-Insoluble and Neutral Linear Synthetic Polymers in Nonaqueous Capillary Zone Electrophoresis Using Phosphonium-Based Ionic Liquid

Fukai, Nao; Kitagawa, Shinya; Ohtani, Hajime

doi:10.15583/jpchrom.2017.008

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…In this case, both nylons were coeluted with HFIP containing 400 mM CTAC. In a previous investigation, we found that the use of hydrophobic cations is effective for enhancing polymer separation [14]. Therefore, phosphonium-based ionic liquid (P66614Cl) was employed as a cationic reagent to generate electrophoretic force of the polymers instead of CTAC.…”

Section: Electrophoresis Of Polyesters and Polyamides In Hfip Mediamentioning

confidence: 99%

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Nonaqueous Capillary Zone Electrophoresis for Polyesters and Polyamides Using Hexafluoroisopropyl Alcohol as Electrophoretic Medium

et al. 2022

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Nonaqueous capillary zone electrophoresis (NACZE) utilizing cationic reagents as an electrophoresis promoter has the potential for separating water-insoluble synthetic polymers and that with tetrahydrofuran based electrophoretic media containing cationic reagents has been reported. In this study, NACZE using hexafluoroisopropanol (HFIP)-based media was developed for separating polyesters and polyamides, which were insoluble in tetrahydrofuran. Nonaqueous media of HFIP containing 400 mM cetyltrimethylammonium chloride (CTAC) and 50 mM trihexyl(tetradecyl)phosphonium chloride (P66614Cl) were used, and it was found that hydrophobic P66614 cation enhanced the electrophoresis of both polyesters and polyamides compared with cetyltrimethylammonium cation. The media containing CTAC resulted in partially separated poly(ethylene terephthalate)/poly(hexamethylene terephthalate) and poly(ethylene terephthalate)/poly(ethylene naphthalate), but P66614Cl failed to separate them. By contrast, nylon 6I and nylon 6/6I were separated with the P66614Cl media, whereas they were co-eluted in the media with CTAC.

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Section: Electrophoresis Of Polyesters and Polyamides In Hfip Mediamentioning

confidence: 99%

“…In subsequent studies, we investigated the effect of surfactant species and electrophoretic medium compositions on electrophoretic behaviors using THF-based electrophoretic media [13][14][15]. Specifically, synthetic polymers soluble in THF were used as test analytes for these investigations.…”

Section: Introductionmentioning

confidence: 99%

Nonaqueous Capillary Zone Electrophoresis for Polyesters and Polyamides Using Hexafluoroisopropyl Alcohol as Electrophoretic Medium

et al. 2022

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“…The apparatus and procedure were similar to those described in our previous study [15]. A commercial CAPI-3100 instrument (Otsuka Electronics, Osaka, Japan) with a fused-silica capillary of i.d.…”

Section: Apparatus For Naczementioning

confidence: 99%

“…Recently, we reported the separation of water-insoluble synthetic polymers in NACZE, in which a THF-based organic solution containing ionic surfactants was used as the electrophoretic media [13][14][15]. In this case, the THF-based solution was employed to make the nonionic and water-insoluble polymers dissoluble.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Behavior in Nonaqueous Capillary Zone Electrophoresis Using Tetrahydrofuran-Based Ternary Nonaqueous Solutions

et al. 2018

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Nonaqueous capillary electrophoresis has the potential to separate water-insoluble analytes. Previously, we reported the separation of water-insoluble and neutral synthetic polymers in nonaqueous capillary zone electrophoresis using tetrahydrofuran (THF)-based ternary nonaqueous solutions. In this paper, the effect of the composition of a THF-based ternary solution (THF, acetonitrile, and methanol) containing cetyltrimethylammonium chloride (CTAC) on electrophoretic behavior is investigated using small organic compounds as prove analytes. In addition to general electrophoretic parameters such as electrophoretic mobility, analytical stability was also evaluated. The electric current, electrophoretic mobility of the benzyltriethylammonium cation (ion pair formation with chloride anion), and electrophoretic mobility of coronene (solvophobic interaction with the CTA cation) were dominated mainly by the THF content, and lower THF content resulted in higher values. In contrast, electroosmotic mobility was enhanced by an increase in THF content and was affected mainly by methanol content. Interestingly, in addition to stable electropherograms, we observed instable (fluctuation of baseline or zero current) electropherograms, which were obtained irregularly. Although a notable relation between the composition and the instable behavior was not observed, it is suggested that this "discontinuous instability" is related with the composition distribution (heterogeneous composition) of the ternary solvents in a capillary. Increasing the temperature effectively suppressed the composition distribution and has the potential to decrease the risk of instable behavior.

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“…Capillary electrophoresis (CE) is an effective tool for evaluating the interaction between the compounds in the liquid phase [8][9][10][11][12]. Therefore, we employed CE to evaluate the interactions between the metals and micelles in the presence of hydrophobic extraction agents.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Interactions Between Palladium(II) and N,N’-Dimethyl-N,N’-di-n-hexyl-thiodiglycolamide in the Presence of Surfactants Using Capillary Electrophoresis

et al. 2019

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Continuous counter-current foam separation (CCFS) is a method for the recovery of valuable metals with high selectivity. It was developed as an organic solvent-free method, and the interaction of surfactants and metal ions in aqueous solution is a key precondition for the successful recovery. In this study, the interactions between the anionic complex of palladium(II) chloride and N,N'-dimethyl-N,N'-din -hexyl-thiodiglycolamide (MHTDA), which is an extraction agent for palladium(II), were investigated by capillary electrophoresis, in the presence of surfactants (sodium dodecyl sulfate (SDS) or polyoxyethylene mono-4-octylphenyl ether (POOPE)). The addition of MHTDA to an electrophoretic media containing SDS, resulted in electropherograms composed of two or three peaks. On the other hand, in the case of an electrophoretic media containing POOPE, the elimination of palladium (II) peak was observed due to MHTDA addition. This behavior suggested that the palladium-MHTDA neutral complex is rapidly captured in the POOPE micelles compared with the SDS micelles, and the use of POOPE is effective for the successful recovery of palladium(II) in CCFS.

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Separation of Water-Insoluble and Neutral Linear Synthetic Polymers in Nonaqueous Capillary Zone Electrophoresis Using Phosphonium-Based Ionic Liquid

Cited by 5 publications

References 16 publications

Nonaqueous Capillary Zone Electrophoresis for Polyesters and Polyamides Using Hexafluoroisopropyl Alcohol as Electrophoretic Medium

Nonaqueous Capillary Zone Electrophoresis for Polyesters and Polyamides Using Hexafluoroisopropyl Alcohol as Electrophoretic Medium

Electrophoretic Behavior in Nonaqueous Capillary Zone Electrophoresis Using Tetrahydrofuran-Based Ternary Nonaqueous Solutions

Evaluation of the Interactions Between Palladium(II) and <i>N</i>,<i>N</i>’-Dimethyl-<i>N</i>,<i>N</i>’-di-<i>n</i>-hexyl-thiodiglycolamide in the Presence of Surfactants Using Capillary Electrophoresis

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