Analysis of inorganic and small organic ions with the capillary electrophoresis microchip

Willauer, Heather D.; Collins, Greg E.

doi:10.1002/elps.200305435

Cited by 34 publications

(18 citation statements)

References 79 publications

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“…Contactless conductivity detectors (CCD) are becoming common in capillary zone electrophoresis (CZE) and in electrophoresis on a chip [1,2]. Even if the first CCD has been put on the market (Trace Dec, Innovative Sensor Technologies, GmbH, Austria), many analytical laboratories are still designing and testing their own detectors with a great variety of electrode types and arrangements.…”

Section: Introductionmentioning

confidence: 99%

The Effects of the Electrode System Geometry on the Properties of Contactless Conductivity Detectors for Capillary Electrophoresis

2005

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The basic analytical parameters of contactless conductivity detectors with planar, semi-tubular and tubular electrodes have been compared. It has been found that the differences in the analytical parameters of the detectors are not significant for analytical use. The mean values of baseline peak-to-peak noise of 0.27, 0.35 and 0.33 mV, sensitivities of 0.97, 2.08 and 2.27 mV/pg (for K þ ion), limits of detection of 0.93, 0.65 and 0.53, and the heights equivalent to a theoretical plate of 2.83, 2.39 and 2.40 mm were obtained for the detectors with planar, semi/tubular and tubular electrodes, respectively. Modifications of the basic detectors, namely a detector with thinned capillary wall and planar electrodes, and a detector with semi-tubular electrodes placed one against the other on the opposite sides of the capillary were also tested. The configuration with the electrodes placed one against the other permits detector construction with zero gap between the electrodes without increasing the noise; when the electrodes overlap, the detector begins to operate as a permittivity detector.

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Section: Introductionmentioning

confidence: 99%

The Effects of the Electrode System Geometry on the Properties of Contactless Conductivity Detectors for Capillary Electrophoresis

2005

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“…Microchip devices are increasingly achieving recognition for performing ion separations due to their manifold promising features, including versatility, portability, and sample handling capabilities, as can be witnessed from two simultaneously appeared literature surveys [12,13]. The authors centered discussions on the latest achievements in the various detection methods suitable to analyzing inorganic ions on CE microchip platforms [12] and basic principles, instrumental aspects, and analytical applications of the CE chips operating with the hydrodynamically closed isotachophoresis-zone electrophoresis (ITP-ZE) systems [13].…”

Section: Reviewsmentioning

confidence: 99%

Capillary electrophoresis of inorganic ions: An update

Timerbaev

2004

Electrophoresis

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This review as a sequel of three earlier similar reports gives a summary of the progress and significant methodological developments, starting from 2002, in the use of capillary electrophoresis (CE) for inorganic ion analysis. As substantiated by the illustrative number of relevant references, improvements in sensitivity achieved both in and outside a CE system, advances in manipulating the separation selectivity, novel hardware configurations, and system performance innovations are continually being reported over the review period. Specifically viewed are the recent advancements in elemental (bio)speciation analysis, which remains one of the most fertile areas of CE research, as well as in three recently booming research topics: contactless conductivity detection, separations on microchips, and transient isotachophoretic preconcentration. A state-of-the-art picture of technique's potentialities within the field of interest presented here demonstrates that CE has become recognized and is growing in acceptance as a reliable alternative to traditional analytical methods such as high-performance liquid chromatography (HPLC).

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“…Vá-rios artigos de revisão podem ser encontrados na literatura 92,123,[128][129][130] e, a seguir, discutiremos somente alguns exemplos.…”

Section: Análise De Pequenas Moléculasunclassified

Microssistemas de análises químicas: introdução, tecnologias de fabricação, instrumentação e aplicações

Coltro¹,

Piccin²,

Carrilho³

et al. 2007

Quím. Nova

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Analysis of inorganic and small organic ions with the capillary electrophoresis microchip

Cited by 34 publications

References 79 publications

The Effects of the Electrode System Geometry on the Properties of Contactless Conductivity Detectors for Capillary Electrophoresis

The Effects of the Electrode System Geometry on the Properties of Contactless Conductivity Detectors for Capillary Electrophoresis

Capillary electrophoresis of inorganic ions: An update

Microssistemas de análises químicas: introdução, tecnologias de fabricação, instrumentação e aplicações

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