Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 645 |
| Fachzeitschrift | Sensors |
| Jahrgang | 23 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - Jan. 2023 |
Abstract
Amino acids belong to the most important compounds for life. They are structural components of proteins and required for growth and maintenance of cells. Essential amino acids cannot be produced by the organism and must be ingested through the nutrition. Therefore, the detection of amino acids is of great interest when analyzing cell culture media and nutrition. In this work, we present a split-ring resonator as a simple but sensitive detector for amino acids. Split-ring resonators are RLC resonant circuits with a split capacitance and thus a resonance frequency that depends on the electromagnetic properties of a liquid sample at the split capacitance. Here, the split capacitance is an interdigital structure for highest sensitivity and covered with a fluidic channel for flow through experiments. First measurements with a vector network analyzer show detection limits in the range from 105 µM for glutamic acid to 1564 µM for isoleucine, depending on the electromagnetic properties of the tested amino acids. With an envelope detector for continuous recording of the resonance frequency, the split-ring resonator can be used in ion chromatography. At a flow rate of 0.5 mL/min, it reaches limits of detection of 485 µM for aspartic acid and 956 µM for lysine.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Analytische Chemie
- Informatik (insg.)
- Information systems
- Biochemie, Genetik und Molekularbiologie (insg.)
- Biochemie
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Physik und Astronomie (insg.)
- Instrumentierung
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
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in: Sensors, Jahrgang 23, Nr. 2, 645, 01.2023.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Split-Ring Resonator Based Sensor for the Detection of Amino Acids in Liquids
AU - Dehning, Kirsten J.
AU - Hitzemann, Moritz
AU - Gossmann, Alexander
AU - Zimmermann, Stefan
N1 - Funding Information: This research was funded by Guangzhou Science and Technology Planning Project (202102080024).
PY - 2023/1
Y1 - 2023/1
N2 - Amino acids belong to the most important compounds for life. They are structural components of proteins and required for growth and maintenance of cells. Essential amino acids cannot be produced by the organism and must be ingested through the nutrition. Therefore, the detection of amino acids is of great interest when analyzing cell culture media and nutrition. In this work, we present a split-ring resonator as a simple but sensitive detector for amino acids. Split-ring resonators are RLC resonant circuits with a split capacitance and thus a resonance frequency that depends on the electromagnetic properties of a liquid sample at the split capacitance. Here, the split capacitance is an interdigital structure for highest sensitivity and covered with a fluidic channel for flow through experiments. First measurements with a vector network analyzer show detection limits in the range from 105 µM for glutamic acid to 1564 µM for isoleucine, depending on the electromagnetic properties of the tested amino acids. With an envelope detector for continuous recording of the resonance frequency, the split-ring resonator can be used in ion chromatography. At a flow rate of 0.5 mL/min, it reaches limits of detection of 485 µM for aspartic acid and 956 µM for lysine.
AB - Amino acids belong to the most important compounds for life. They are structural components of proteins and required for growth and maintenance of cells. Essential amino acids cannot be produced by the organism and must be ingested through the nutrition. Therefore, the detection of amino acids is of great interest when analyzing cell culture media and nutrition. In this work, we present a split-ring resonator as a simple but sensitive detector for amino acids. Split-ring resonators are RLC resonant circuits with a split capacitance and thus a resonance frequency that depends on the electromagnetic properties of a liquid sample at the split capacitance. Here, the split capacitance is an interdigital structure for highest sensitivity and covered with a fluidic channel for flow through experiments. First measurements with a vector network analyzer show detection limits in the range from 105 µM for glutamic acid to 1564 µM for isoleucine, depending on the electromagnetic properties of the tested amino acids. With an envelope detector for continuous recording of the resonance frequency, the split-ring resonator can be used in ion chromatography. At a flow rate of 0.5 mL/min, it reaches limits of detection of 485 µM for aspartic acid and 956 µM for lysine.
KW - amino acids
KW - conductivity
KW - relative permittivity
KW - resonance frequency
KW - split-ring resonator
KW - SRR
UR - http://www.scopus.com/inward/record.url?scp=85146581891&partnerID=8YFLogxK
U2 - 10.3390/s23020645
DO - 10.3390/s23020645
M3 - Article
C2 - 36679444
AN - SCOPUS:85146581891
VL - 23
JO - Sensors
JF - Sensors
SN - 1424-8220
IS - 2
M1 - 645
ER -