A bipolar membrane-based cation electrolytic membrane suppressor for ion chromatography

Zhao, Lili; Lu, Yongju; Zhang, Feifang; Yang, Bingcheng

doi:10.1016/j.chroma.2019.06.052

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…The fabrication procedure of an EDP is similar to a typical electrodialytic membrane suppressor , or charge detector (CHD) described elsewhere with slight modifications. In brief, an EDP incorporates two BPMs sandwiched in between three sets of screens, as depicted in Figure .…”

Section: Experimental Sectionmentioning

confidence: 99%

Electrodialysis Pump Based on Enhanced Water Dissociation of Bipolar Membrane

et al. 2020

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We describe a novel micropump mode–electrodialysis pump (EDP), which is based on the recombination of hydrogen and hydroxyl ions generated by enhanced water dissociation of bipolar membrane (BPM). The pump is in a sandwich-like configuration in which the central production channel is spatially isolated from two outer regenerant chambers by a BPM, respectively. Both BPMs are put at the same direction, in which the anion exchange membrane (AEM) side is facing the anode with respect to the cation exchange membrane (CEM) side facing the cathode. Pure water as the feed solution flows through the regenerant chambers at a conventional flow rate (e.g., 0.2 mL/min). Under the electric field, enhanced water dissociation at the junction layer of BPM will occur, generating hydroxyl and hydrogen ions. Their electrodialytic migration into the central channel will recombine water and its flow rate is correlated with the applied current. The pump shows near-ideal Faradaic efficiency and at least 0.8 μL/min can be achieved by controlling the current. The produced water is near neutral and obvious enrichment of trace impurity anions is observed in the production channel.

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Section: Experimental Sectionmentioning

confidence: 99%

Electrodialysis Pump Based on Enhanced Water Dissociation of Bipolar Membrane

et al. 2020

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“…The analysis can thus be carried out on standard single quadrupole LC-MS instruments without the need for specific ion chromatography equipment. Additionally, the applicability of pre-detection devices such as an electrolytic suppressor is limited for ampholytic analytes as AAs because they can be significantly removed together with the eluent cations [42][43][44][45]. Pulsed amperometric detection is another commonly used detection technique for AA analysis with IC due to its ease of operation, robustness, and relatively high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A simple ion chromatography‐mass spectrometry method for amino acid analysis in beer

Schmitt

Fillsack

Seubert

2023

J of Separation Science

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The amino acid footprint of different beer samples was analyzed using ion chromatography coupled with electrospray ionization mass spectrometry. A tailor-made polymer-based cation-exchange resin was operated with a mass spectrometry-compatible eluent under isocratic conditions on a standard highperformance liquid chromatography system coupled to a single quadrupole mass spectrometer using formic acid as a volatile eluent ion source. The partially separated peaks of the isomeric pair isoleucine/leucine were processed according to their area response ratio using vertical peak splitting or Gaussian fit. Additionally, the chromatographic resolution of the isomers was optimized with an adjusted, solely aqueous mobile phase from 0.85 to 2.92. Ion suppression in the electrospray ion source was investigated for the derivatization-free method and found to be insignificant (recovery value 100 ± 15%) for 15 out of the 20 analytes.Quantitative results for various beer and mixed-beer beverages were found to be in high agreement with existing methods. Simultaneous photometric detection demonstrated the method's ability to successfully remove most of the interfering matrix compounds.

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Recent Trends in Suppressor Techniques for Ion Chromatography

Zhong

Pan

2023

Chromatographia

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A bipolar membrane-based cation electrolytic membrane suppressor for ion chromatography

Cited by 7 publications

References 17 publications

Electrodialysis Pump Based on Enhanced Water Dissociation of Bipolar Membrane

Electrodialysis Pump Based on Enhanced Water Dissociation of Bipolar Membrane

A simple ion chromatography‐mass spectrometry method for amino acid analysis in beer

Recent Trends in Suppressor Techniques for Ion Chromatography

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