Recent developments in electrolytic devices for ion chromatography

Liu, Yan; Srinivasan, Kannan; Pohl, Christopher A.; Avdalović, Nebojša

doi:10.1016/j.jbbm.2004.01.004

Cited by 55 publications

(43 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inlets 1, 2 and 3 are connected to Pump 1 (peristaltic pump, with a 1 mL/min flow rate, controlled by a home-made flow control driver), Pump 2 (1.3 mL/min, DP-8020, Tosoh, Tokyo, Japan) and Pump 3 (peristaltic pump, with a 1 mL/min flow rate, controlled by a home-made flow control driver), respectively. A 100-mM MSA or a 200-mM NaCl solution is pumped into Inlet 1, pure water is pumped into Inlets 2 and 3, A comparison device without a bipolar boundary, the CDboundary0, [6][7][8] was built to test the proposed mechanisms of the four-bipolar-boundary device; this is schematically displayed in Fig. 3.…”

Section: Architecture Of the Four-bipolar-boundary Device And Comparimentioning

confidence: 99%

“…Small et al 4,5 introduced a new method called ion reflux, wherein eluent generation and suppression were integrated into an automated form of IC that has the potential to continuously operate. Dionex introduced the EG40 eluent generator, [6][7][8] which uses one of two cartridges to produce either a KOH solution (for anion analysis) with a cation exchanger or MSA (for cation analysis) with an anion exchanger. The eluent's concentration is controlled by the amount of current applied to the ion exchange unit.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the dead volume between the device and the separation column is increased. 8,9 The strong anion exchanger is known to undergo Hofmann elimination by attack of the hydroxyl group on the quaternary amine, and to be electrolyzed by oxidation and reduction at the electrodes. 10 This study aims to develop a new device that can tolerate high pressures, resist degradation due to electrolysis at the electrodes, and produce a continuous stream of high-purity acid solution in line, which does not contain gases (H2 or O2), produced by electrolysis of water at the electrodes and impurity cations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

In-line System to Produce High-Purity Acid Solutions

et al. 2016

View full text Add to dashboard Cite

Herein, we report a new device that generates a high-purity acid solution. It comprises three compartments divided by anion-exchange membranes and filled with ion-exchange resins. Fluorochemical cation-exchange membranes, which tolerate electrochemical wear and permit bulk flow, are inserted between each electrode and the anion-exchange resin.A bipolar boundary is a composite boundary comprising anion and cation exchangers. This device has four bipolar boundaries to separate the location of acid generation from the location where water is electrolyzed. It can tolerate high pressures, resist degradation due to electrolysis at the electrodes, and produce high-purity acid solutions that are free from gases and cationic impurities. The acid solution is generated on the basis of an electrokinetic phenomenon at the surfaces of ion-exchange resins and membranes in an electric field; its concentration can be controlled at rates from 0.01 to 100 μmol/min by adjusting the electrical current applied to the device.

show abstract

Section: Architecture Of the Four-bipolar-boundary Device And Comparimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In-line System to Produce High-Purity Acid Solutions

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The Atlas electrolytic suppressor (AES) by Dionex is an example of a suppressor based on a monolithic bed (www.dionex.com). The anion version of the suppressor consists of six polyethylene cationic exchange monoliths which are functionalized with sulfonated groups [114]. Each monolith is placed next to a flow distributor, in an alternating…”

Section: Monolithic Suppressorsmentioning

confidence: 99%

Developments in ion chromatography using monolithic columns

Chambers

Glenn

Lucy³

2007

J of Separation Science

View full text Add to dashboard Cite

The focus of this review is on current status and on-going developments in ion chromatography (IC) using monolithic phases. The use and potential of both silica and polymeric monoliths in IC is discussed, with silica monoliths achieving efficiencies upwards of 10(5) plates/m for inorganic ions in a few minutes or less. Ion exchange capacity can be introduced onto the monolithic columns through the addition of ion interaction reagents to the eluent, coating of the monolith with ionic surfactants or polyelectrolyte latexes, and covalent bonding. The majority of the studies to date have used surfactant-coated columns, but the stability of surfactant coatings limits this approach. Applications of monolithic IC columns to the separation of inorganic anions and cations are tabulated. Finally, a discussion on the recent commercialization of monolithic IC columns and the use of monolithic phases for IC peripherals such as preconcentrator columns, microextractors and suppressors is presented.

show abstract

“…These gases had to be dealt with downstream by adding a flow restrictor at the conductivity cell outlet for detection [8]. Commercial eluent generators also expose the eluent (analytical) stream to an electrode and the consequences of the formation of gas and electrochemical by-products must be dealt with [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%