Capillary Ion Chromatography Using 18-Crown-6 Ether as Eluent Additive for the Separation of Anions

Kawase, Itsuya; Lim, Lee Wah; Takeuchi, Toyohide

doi:10.1007/s10337-017-3311-5

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…The NH 4 + amount in the resulting water or KCl solutions was analyzed using an ion chromatograph equipped with a conductivity detector. A 3.5 mM (COOH) 2 solution containing 2.0 mM 18-crown-6 ether was used as the eluent to suppress the interference by the K + cation . The NH 4 + amount in seawater was determined by UV–visible absorption spectroscopy after the indophenol assay …”

Section: Methodsmentioning

confidence: 99%

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Photocatalytic Dinitrogen Fixation with Water on Bismuth Oxychloride in Chloride Solutions for Solar-to-Chemical Energy Conversion

et al. 2020

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Ammonia is an indispensable chemical. Photocatalytic NH 3 production via dinitrogen fixation using water by sunlight illumination under ambient conditions is a promising strategy, although previously reported catalysts show insufficient activity. Herein, we showed that ultraviolet light irradiation of a semiconductor, bismuth oxychloride with surface oxygen vacancies (BiOCl-OVs), in water containing chloride anions (Cl − ) under N 2 flow efficiently produces NH 3 . The surface OVs behave as the N 2 reduction sites by the photoformed conduction band electrons. The valence band holes are consumed by self-oxidation of interlayer Cl − on the catalyst. The hypochloric acid (HClO) formed absorbs ultraviolet light and undergoes photodecomposition into O 2 and Cl − . These consecutive photoreactions produce NH 3 with water as the electron donor. The Cl − in solution compensates for the removed interlayer Cl − and inhibits catalyst deactivation. Simulated sunlight illumination of the catalyst in seawater stably generates NH 3 with 0.05% solar-to-chemical conversion efficiency, thus exhibiting significant potential of the seawater system for artificial photosynthesis.

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Section: Methodsmentioning

confidence: 99%

“…A 3.5 mM (COOH) 2 solution containing 2.0 mM 18-crown-6 ether was used as the eluent to suppress the interference by the K + cation. 62 The NH 4 + amount in seawater was determined by UV−visible absorption spectroscopy after the indophenol assay. 26 Analysis.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Photocatalytic Dinitrogen Fixation with Water on Bismuth Oxychloride in Chloride Solutions for Solar-to-Chemical Energy Conversion

et al. 2020

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“…Capillary IC with lab‐made columns packed with polystyrene/divinylbenzene spherical particles was used for separation of inorganic anions using partially non‐aqueous solutions containing 18‐crown‐6 as the eluent. Enhanced sensitivity of inorganic anions detection was observed for C 4 D compared to UV detection in suppressed IC mode . C 4 D is capable of monitoring conductivity changes in narrow capillaries and due to its non‐destructive character, C 4 D was applied in the monitoring of gradient programs in micro‐ and nano‐HPLC .…”

Section: Other Applications Of C4dmentioning

confidence: 99%

Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

Kubáň

Hauser

2018

Electrophoresis

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The publications concerning capacitively coupled contactless conductivity detection for the 2-year period from mid-2016 to mid-2018 are covered in this update to the earlier reviews of the series. Relatively few reports on fundamental investigations or new designs have appeared in the literature in this time interval, but the development of new applications with the detection method has continued strongly. Most often, contactless conductivity measurements have been employed for the detection of inorganic or small organic ions in conventional capillary electrophoresis, less often in microchip electrophoresis. A number of other uses, such as detection in chromatography or the gauging of bubbles in streams have also been reported.

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“…[3][4][5][6][7][8] In addition, with the downsizing of ion chromatographs, mini-columns or capillary columns are employed to IC. [9][10][11][12][13][14][15] Considering the above background, we came up with use of a guard column in IC. Guard columns packed with the same ionexchange resin as the IC separation column are generally used to remove soluble impurities and extend the lifespan of the resin in the separation column.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Anion-exchange Guard Column as an Ion Chromatographic Column of Anions Including Application to Simultaneous Separation of Anions and Cations

et al. 2019

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This study demonstrated that a guard column containing anion-exchange resin has the potential for use as a separation column for acid eluent. Specifically, a 1-cm long anion-exchange guard column with a 4.6-mm internal diameter provided good separation of monovalent inorganic anions, by elution of 8 mM tartaric acid or 4 mM malic acid. Using the guard column with acid eluent could be applied to evaluation of nitrite and nitrate ions in mountain and urban river water samples. When the guard column was connected in front of a cation-exchange separation column (15 cm long × 4.6 mm internal diameter) in a series, the system provided simultaneous separation of anions and cations in eluent of 8 mM tartaric acid and 0.5 mM 18-crown-6 ether by a single injection.

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Capillary Ion Chromatography Using 18-Crown-6 Ether as Eluent Additive for the Separation of Anions

Cited by 7 publications

References 22 publications

Photocatalytic Dinitrogen Fixation with Water on Bismuth Oxychloride in Chloride Solutions for Solar-to-Chemical Energy Conversion

Photocatalytic Dinitrogen Fixation with Water on Bismuth Oxychloride in Chloride Solutions for Solar-to-Chemical Energy Conversion

Contactless conductivity detection for analytical techniques: Developments from 2016 to 2018

Utilization of Anion-exchange Guard Column as an Ion Chromatographic Column of Anions Including Application to Simultaneous Separation of Anions and Cations

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