Oscillometric detector for ion chromatography.  A note on detection limit and detector sensitivity

Pal, Ferenc.; Püngor, E.; Kováts, Ervin sz.

doi:10.1021/ac00171a019

Cited by 30 publications

(13 citation statements)

References 17 publications

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“…The performance of the two detectors in terms of S/N, etc. was essentially the same, confirming the conclusion of Pal et al [117] from two decades ago.…”

Section: D and Its Potential For Capillary Icsupporting

confidence: 88%

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Capillary ion chromatography

Kubáň

Dasgupta

2004

J of Separation Science

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“…The performance of the two detectors in terms of S/N, etc. was essentially the same, confirming the conclusion of Pal et al [117] from two decades ago.…”

Section: D and Its Potential For Capillary Icsupporting

confidence: 88%

“…It was used for flow injection based measurements of conductivity and permittivity. In 1988 they used this detector in an end-column format for IC [117]. The electronic circuitry was modified from the previous version and a high frequency (42 MHz) crystal oscillator was used for excitation.…”

Section: D and Its Potential For Capillary Icmentioning

confidence: 99%

Capillary ion chromatography

Kubáň

Dasgupta

2004

J of Separation Science

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“…Their advantage is the fact that the electrodes do not contact the solution so that any electrode fouling is prevented. Pungor and coworkers [4] have demonstrated, that in ion chromatography oscillometric detection yields results comparable to conductometric detection.…”

Section: Principles Of Electrochemical Detectorsmentioning

confidence: 99%

Electrochemical detectors ? tailormade techniques for liquid chromatography and capillary electrophoresis?

Buchberger

1996

Analytical and Bioanalytical Chemistry

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Electrochemical detectors for liquid chromatography and capillary electrophoresis are reviewed with special emphasis on electrode materials that allow the amperometric detection of otherwise non-electroactive compounds such as aliphatic alcohols, carbohydrates or amino acids. Noble metal electrodes can catalyze the oxidation of aliphatic compounds in alkaline media if multistep potential-time waveforms are employed. Various metal and metal oxide electrodes such as Ni, Cu or Co allow the detection of carbohydrates and similar compounds under constant potential conditions. Metallic copper electrodes operating in an amperometric mode or in a potentiometric mode can also serve as selective detectors for complexing species. A range of applications in combination with chromatography and electrophoresis is summarized. The current state of electrochemical detectors indicates that both amperometric and potentiometric detectors are on the verge of becoming tailormade detectors for micro-separation techniques.

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“…The original idea of using CCD with electromigration methods dates back to 1980 when a contactless conductometric detector with four-electrode configuration was constructed and used for capillary ITP [1]. Later a two-electrode configuration was used as a detection technique for ion chromatography by Pungor and coworkers [2,3]. First real breakthrough in CCD for CE dates to 1998, when a two-electrode capacitatively coupled contactless conductometric detector (C 4 D) was presented independently by two research groups [4,5].…”

Section: Introductionmentioning

confidence: 99%

Separation of phenolic acids by capillary electrophoresis with indirect contactless conductometric detection

2006

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A new method for the electrophoretic separation of nine phenolic acids (derivatives of benzoic and cinnamic acids) with contactless conductometric detection is presented. Based on theoretical calculations, in which the mobility of the electrolyte co- and counterions and mobility of analytes are taken into consideration, the electrolyte composition and detection mode was selected. This approach was found to be especially valuable for optimization of the electrolyte composition for the separation of analytes having medium mobility. Indirect conductometric detection mode was superior to the direct mode as predicted theoretically. The best performance was achieved with 150 mM 2-amino-2-methylpropanol electrolyte at pH 11.6. The separation was carried out in a counter-electroosmotic mode and completed in less than 6 min. The LODs achieved were about 2.3-3.3 microM and could be further improved to 0.12-0.17 microM by using a sample stacking procedure. The method compares well to the UV-Vis detection.

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Oscillometric detector for ion chromatography. A note on detection limit and detector sensitivity

Cited by 30 publications

References 17 publications

Capillary ion chromatography

Capillary ion chromatography

Electrochemical detectors ? tailormade techniques for liquid chromatography and capillary electrophoresis?

Separation of phenolic acids by capillary electrophoresis with indirect contactless conductometric detection

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