Liquid phase detection in the miniature scale. Microfluidic and capillary scale measurement and separation systems. A tutorial review

Warren, Cable G.; Dasgupta, Purnendu K.

doi:10.1016/j.aca.2024.342507

Analytica Chimica Acta

2024

DOI: 10.1016/j.aca.2024.342507

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Liquid phase detection in the miniature scale. Microfluidic and capillary scale measurement and separation systems. A tutorial review

Cable G. Warren,

Purnendu K. Dasgupta

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Cited by 4 publications

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Contactless Conductivity Detection for Capillary Electrophoresis—Developments From 2020 to 2024

Hauser,

Kubáň

2024

Electrophoresis

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The review covering the development of capillary electrophoresis with capacitively coupled contactless conductivity detection from 2020 to 2024 is the latest in a series going back to 2004. The article considers applications employing conventional capillaries and planar lab‐on‐chip devices as well as fundamental and technical developments of the detector and complete electrophoresis instrumentation.

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Contactless Conductivity Detection for Capillary Electrophoresis—Developments From 2020 to 2024

Hauser,

Kubáň

2024

Electrophoresis

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Functionalization of High‐Density Polyethylene Capillaries for Open Tubular Ion Chromatography

Yousef,

Shelor,

Horn

et al. 2024

J of Separation Science

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Ion chromatography is the anion analysis benchmark. A miniature form, Open Tubular Ion Chromatography (OTIC), has attractive attributes for efficient ion separations. Here, we fabricate and characterize high‐density polyethylene (HDPE) open tubular anion exchange columns (OTCs). We attach positively charged latex particles onto negatively charged capillary surfaces. For efficient OTIC, column diameters need to be < ∼20 µm; functionalizing the bore is challenging. Methods to introduce acid groups to an HDPE capillary bore, e.g., sulfonation using chlorosulfonic or sulfuric acid solutions, with or without grafting of an aromatic ring through photo‐ or chemical grafting first, are explored. Following quaternary ammonium latex attachment, the ion exchange capacity and separating abilities of each OTC were measured as an index of OTC performance. Gradual loss of capacity was observed for many of these; high‐resolution mass spectrometry confirmed the leaching of detached oxidized/sulfonated oligomeric fragments and consequent poisoning of the latex sites. Ways to ameliorate this and/or to rejuvenate the columns are also described.

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Comparison of experimental and simulated separation performance in capillary tube-in-manifold devices

Piccolo,

Keller,

Czarnecki

et al. 2024

Journal of Chromatography A

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Liquid phase detection in the miniature scale. Microfluidic and capillary scale measurement and separation systems. A tutorial review

Cited by 4 publications

References 314 publications

Contactless Conductivity Detection for Capillary Electrophoresis—Developments From 2020 to 2024

Contactless Conductivity Detection for Capillary Electrophoresis—Developments From 2020 to 2024

Functionalization of High‐Density Polyethylene Capillaries for Open Tubular Ion Chromatography

Comparison of experimental and simulated separation performance in capillary tube-in-manifold devices

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