Split-ring resonator with interdigital Split electrodes as detector for liquid and ion chromatography

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OriginalspracheEnglisch
Aufsatznummer100645
Seitenumfang7
FachzeitschriftSensing and Bio-Sensing Research
Jahrgang44
Frühes Online-Datum9 Apr. 2024
PublikationsstatusVeröffentlicht - Juni 2024

Abstract

The analysis of food and drugs as well as the monitoring of chemical processes and bioreactors by high-performance liquid chromatography and ion chromatography requires universal, cost-effective, and sensitive detectors. Therefore, this work presents a split-ring resonator that detects changes in the electrical and dielectric properties of the eluate from liquid chromatography or ion chromatography by monitoring the amplitude of the transmitted signal using an envelope detector. The used split-ring resonator consists of a simple printed circuit board featuring two microstrip lines. One is formed to a ring with interdigital split electrodes. The interdigital split electrodes forming the sensitive area significantly enhance the sensitivity to changes in relative permittivity, dielectric losses and electrical conductivity of the eluate In addition, the split-ring resonator is a small, inexpensive and easy-to-use detector that uses several dielectric parameters simultaneously for the measurement. Furthermore, the split-ring resonator measures these parameters at a significantly lower frequency than optical detectors and therefore measures different changes in frequency-dependent permittivity. For demonstrating feasibility of a split-ring resonator as a detector for high-performance liquid chromatography and ion chromatography, various anion and cation standards, basic and acidic amino acids, sugars, as well as sugar alcohols were separated and detected. A conductivity detector for ion chromatography and a refractive index detector for high-performance liquid chromatography were used as reference detectors.

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Split-ring resonator with interdigital Split electrodes as detector for liquid and ion chromatography. / Dehning, Kirsten J.; Hitzemann, Moritz; Zimmermann, Stefan.
in: Sensing and Bio-Sensing Research, Jahrgang 44, 100645, 06.2024.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Dehning KJ, Hitzemann M, Zimmermann S. Split-ring resonator with interdigital Split electrodes as detector for liquid and ion chromatography. Sensing and Bio-Sensing Research. 2024 Jun;44:100645. Epub 2024 Apr 9. doi: 10.1016/j.sbsr.2024.100645
Dehning, Kirsten J. ; Hitzemann, Moritz ; Zimmermann, Stefan. / Split-ring resonator with interdigital Split electrodes as detector for liquid and ion chromatography. in: Sensing and Bio-Sensing Research. 2024 ; Jahrgang 44.
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AU - Dehning, Kirsten J.

AU - Hitzemann, Moritz

AU - Zimmermann, Stefan

PY - 2024/6

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AB - The analysis of food and drugs as well as the monitoring of chemical processes and bioreactors by high-performance liquid chromatography and ion chromatography requires universal, cost-effective, and sensitive detectors. Therefore, this work presents a split-ring resonator that detects changes in the electrical and dielectric properties of the eluate from liquid chromatography or ion chromatography by monitoring the amplitude of the transmitted signal using an envelope detector. The used split-ring resonator consists of a simple printed circuit board featuring two microstrip lines. One is formed to a ring with interdigital split electrodes. The interdigital split electrodes forming the sensitive area significantly enhance the sensitivity to changes in relative permittivity, dielectric losses and electrical conductivity of the eluate In addition, the split-ring resonator is a small, inexpensive and easy-to-use detector that uses several dielectric parameters simultaneously for the measurement. Furthermore, the split-ring resonator measures these parameters at a significantly lower frequency than optical detectors and therefore measures different changes in frequency-dependent permittivity. For demonstrating feasibility of a split-ring resonator as a detector for high-performance liquid chromatography and ion chromatography, various anion and cation standards, basic and acidic amino acids, sugars, as well as sugar alcohols were separated and detected. A conductivity detector for ion chromatography and a refractive index detector for high-performance liquid chromatography were used as reference detectors.

KW - Equivalent circuit

KW - Ion chromatography

KW - Liquid chromatography

KW - Split-ring resonator

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