Quantitative on‐line concentration for capillary electrophoresis with inkjet sample introduction technique

Rang, Ying; Zeng, Hulie; Nakajima, Hirochika; Kato, Shungo; Uchiyama, Katsumi

doi:10.1002/jssc.201500201

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…A quantitative CE method combined with inkjet injection for the quantitative concentration and determination of theobromine, caffeine, and theophylline in green tea was established by Rang et al. . A 100 mM borate buffer at pH 10.55 with 100 mM SDS was used as the running solution.…”

Section: Micellar Methodsmentioning

confidence: 99%

Recent progress of sample stacking in capillary electrophoresis (2014–2016)

et al. 2016

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The term "sample stacking" comprises a relatively broad spectrum of techniques that already form an almost inherent part of the methodology of CZE. Their principles are different but the effect is the same: concentration of a diluted analyte into a narrow zone and considerable increase of the method sensitivity. This review brings a survey of papers on electrophoretic sample stacking published approximately since the second quarter of 2014 till the first quarter of 2016. It is organized according to the principles of the stacking methods and includes chapters aimed at the concentration adjustment principle (Kohlrausch stacking), techniques based on pH changes, micellar methods, and other stacking techniques. Not reviewed are papers on transient ITP that are covered by another review in this issue.

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Section: Micellar Methodsmentioning

confidence: 99%

Recent progress of sample stacking in capillary electrophoresis (2014–2016)

et al. 2016

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“…Comparing with these techniques, CE has significant advantages on ionized components like organic acids or alkaloids, due to its superior separation efficiency and shorter analytical run times. Meanwhile, the detection sensitivity of CE can be improved by on‐line preconcentration, such as field‐amplified sample stacking (FASS) , field‐enhanced sample injection , pH junction , sweeping , and large‐volume sample stacking .…”

Section: Introductionmentioning

confidence: 99%

Sensitive determination of pyrrolizidine alkaloids inTussilago farfaraL. by field-amplified, sample-stacking, sweeping micellar electrokinetic chromatography

Cao

et al. 2016

J. Sep. Science

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Pyrrolizidine alkaloids are the toxic components in Tussilago farfara L. Due to the lack of standard substances for quantitative analysis and traces of pyrrolizidine alkaloids in total alkaloids, the full quality control of Tussilago farfara L has been limited. In this study, we aimed to solve the difficulty of determination of pyrrolizidine alkaloids and identify more components in the total alkaloids. An on-line preconcentration method has been applied to improve determining sensitivity of pyrrolizidine alkaloids in Tussilago farfara L. in which included field-amplified sample stacking and sweeping in micellar electrokinetic capillary chromatography. The main parameters that affected separation and stacking efficiency were investigated in details. Under the optimal conditions, the sensitivity enhancement factors obtained by the developed method for the analytes were from 15- to 12-fold, the limits of detection of senkirkine and senecionine were 2∼5 μg/L. Senkirkine and senecionine have been detected in alkaloids (c) of Tussilago farfara L, along ferulic acid methyl ester and methyl caffeate. The developed method was also applied to the analysis of acid extraction (a) of Tussilago farfara L, and senkirkine could be detected directly. The results indicated that the developed method is feasible for the analysis of pyrrolizidine alkaloids in Tussilago farfara L with good recoveries.

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Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2014–2016)

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Wuethrich

et al. 2016

Electrophoresis

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One of the most cited limitations of capillary (and microchip) electrophoresis is the poor sensitivity. This review continues to update this series of biennial reviews, first published in Electrophoresis in 2007, on developments in the field of on-line/in-line concentration methods in capillaries and microchips, covering the period July 2014-June 2016. It includes developments in the field of stacking, covering all methods from field amplified sample stacking and large volume sample stacking, through to isotachophoresis, dynamic pH junction, and sweeping. Attention is also given to on-line or in-line extraction methods that have been used for electrophoresis.

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Quantitative on‐line concentration for capillary electrophoresis with inkjet sample introduction technique

Cited by 10 publications

References 23 publications

Recent progress of sample stacking in capillary electrophoresis (2014–2016)

Recent progress of sample stacking in capillary electrophoresis (2014–2016)

Sensitive determination of pyrrolizidine alkaloids inTussilago farfaraL. by field-amplified, sample-stacking, sweeping micellar electrokinetic chromatography

Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2014–2016)

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