P2.02 - Split-ring resonator: A new detector in liquid chromatography
- 14. Dresdner Sensor-Symposium 2019
2019-12-02 - 2019-12-04
- P2. Technologien
- K. Dehning, M. Hitzemann, S. Fisahn, S. Zimmermann - Leibniz University Hannover, Hannover/D
- 167 - 171
There is a wide variety of applications that use liquid chromatography (LC) as a physical separation technique for liquid samples e.g in food or drug analysis [1,2]. The LC is often combined with optical detectors that detect the eluting substances according to their fluorescence, absorption and refraction charateristics. Some substances have to go through a time consuming and elaborate sample preparation process so that they can be detected by such optical detectors. Other detectors use a different charateristic for detection, e.g. mass spectrometers that allow the orthogonal identification of analytes. However, major disadvantages are high purchasing and operating costs and the considerable intrumental effort, besides the destruction of the sample due to the required ionization . This spikes the interest in new non-destructive and simple detectors. Here, we present a detector that is based on a split-ring resonator (SRR) and uses the relative permitvity instead of optical properties. Split-ring resonators are simple and very sensitive sensors. Gehl et. al introduced a first split-ring resonator as a possible detector for liquid chromatography . ...