Development of high performance electrochemical solvent extraction method

Okugaki, Tomohiko; Kitatsuji, Yoshihiro; Kasuno, Megumi; Yoshizumi, Asuka; Kubota, Hirokazu; Shibafuji, Yayoi; Maeda, Kohji; Yoshida, Zenko; Kihara, Sorin

doi:10.1016/j.jelechem.2009.01.022

Cited by 20 publications

(22 citation statements)

References 35 publications

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“…3 was developed by the group of present authors as a new cell that could overcome the above difficulties. [10][11][12]15 The fabrication of FECRIT, the procedure for the electrolysis with FECRIT and some applications of FECRIT will be described in detail in Sects. 3 and 4.…”

Section: ·2·2 Flow Cell Composed Of a Porous Ptfe Resin Tubementioning

confidence: 99%

“…Though electrochemical principles applied to coulometric works performed so far have been redox reactions [1][2][3][4][5][6][7] except for the works introduced in this review, [8][9][10][11][12][13][14][15] the ion transfer reactions at the aqueous | organic solution, W | O, interface, [16][17][18] which have been investigated extensively during the last few decades as a field of electrochemistry, are expected to provide another principle applicable to coulometry. If coulometry expands its field to the interfacial ion transfers, the precise and absolute determination becomes possible not only for species that are easily oxidized or reduced in solutions, but also for those that are not easily oxidized or reduced.…”

Section: Introductionmentioning

confidence: 99%

“…3) for the rapid and coulometric ion transfer at the W | O interface [10][11][12]15 by utilizing a porous poly(tetrafluoroethylene), PTFE, tube (1.0 mm inner diameter) with a metal wire (0.8 mm Fig. 1 Cell for rapid batch electrolysis at the stirred W | O interface.…”

Section: Introductionmentioning

confidence: 99%

“…In the present article, the performance of the FECRIT will be reviewed from the view-points of the accurate and precise coulometric determination 10,12,15 or electrolytic solvent extraction 11 of ionic species, after a brief introduction of total electrolysis methods proposed so far. The applicability of the FECRIT to the flow injection analysis and the usefulness of the two-step FECRIT system in the automated analysis 12 will be also discussed.…”

Section: Introductionmentioning

confidence: 99%

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Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

Kihara¹,

Kasuno

2011

ANAL. SCI.

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Section: ·2·2 Flow Cell Composed Of a Porous Ptfe Resin Tubementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

Kihara¹,

Kasuno

2011

ANAL. SCI.

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“…could be performed. [12][13][14] In this study, we have focused attention on the possibility for the O/W-type flow cell to separate ions by electrochemical control. This possibility has only been attempted by Kasuno et al, 14 who constructed a two-step flow-cell system in view of applications to clinical samples.…”

Section: +mentioning

confidence: 99%

Flow-Injection On-line Electrochemical Separation/Determination of Ions Using a Two-Step Oil/Water-Type Flow Cell System

Gohara

Osakai

2010

Anal. Sci.

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A flow system for electrochemical separation and detection of ions was constructed by connecting two oil/water (O/W)-type flow cells, in which a long polarizable O/W interface was formed at the inner surface of a porous poly(tetrafluoroethylene) (PTFE) tube. Using this system, acetylcholine and choline ions, whose ion-transfer potentials are different by only 60 mV, could be separated and determined simultaneously. It was thus shown that the present flow system is promising for the electrochemical flow separation/detection of ions and, in principle, also for electrochromatographic separation of ions.

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Redox Chemistry of Third Phases Formed in the Cerium/Nitric Acid/Malonamide‐n‐Dodecane Solvent Extraction System

Ellis

Antonio

2011

ChemPlusChem

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Upon solvent extraction of the colorless solution 0.1 M Ce(NO3)3⋅6H2O in 3 M HNO3 with DMDBTDMA (N,N′‐dimethyl‐N,N′‐dibutyltetradecyl malonamide) at a concentration of 0.5 M in n‐dodecane (also a colorless solution), a yellow third phase is formed. In keeping with previous observations reported in the historical literature of solvent extraction, the yellow color was initially interpreted as an indication of the presence of tetravalent cerium, which is, coincidentally, yellow in aqueous HNO3. The valence quandary arising from the visual assessment led us to extract a freshly prepared solution of 0.1 M cerium(IV) nitrate, which was obtained by exhaustive bulk electrolysis of 0.1 M Ce(NO3)3⋅6H2O in 3 M HNO3. A red third phase was obtained. Under ambient light, the red third phase reverts to the yellow color of the third phase formed upon solvent extraction of CeIII. These observations, in combination with results obtained by UV/Visible and X‐ray absorption spectroscopies as well as electrochemical studies of the yellow and red third phases, demonstrate that the colors are directly correlated with changes in Ce valence, where CeIII obtains in the yellow third phase and CeIV in the red one, and the formation of coordination complexes with DMDBTDMA. By use of three‐phase electrode voltammetry and controlled potential electrolysis techniques, the one‐electron CeIII/CeIV redox chemistry in the third phases was examined in a manner not realized beforehand. These results, demonstrating reversible electrochromism, stand at the intersection of the fields of electroanalytical chemistry, on the one hand, and separations science, on the other, thus providing original insights into third phase phenomena and ion transfer across the aqueous–organic liquid interface in the extraction system.

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Development of high performance electrochemical solvent extraction method

Cited by 20 publications

References 35 publications

Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

Rapid and Precise Coulometric Determination and Separation of Redox Inert Ions Based on Electrolysis for Ion Transfer at the Aqueous|Organic Solution Interface

Flow-Injection On-line Electrochemical Separation/Determination of Ions Using a Two-Step Oil/Water-Type Flow Cell System

Redox Chemistry of Third Phases Formed in the Cerium/Nitric Acid/Malonamide‐n‐Dodecane Solvent Extraction System

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