Planar microwave sensor for detection and discrimination of aqueous organic and inorganic solutions
| Autor: | Supakorn Harnsoongnoen, Apirat Siritaratiwat, Urit Charoen-In, Anuwat Wanthong |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Aqueous solution Coefficient of determination Coplanar waveguide 010401 analytical chemistry Metals and Alloys Analytical chemistry Resonance 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Spectral line 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Materials Chemistry Transmission coefficient Electrical and Electronic Engineering 0210 nano-technology Citric acid Instrumentation Nonlinear regression |
| Zdroj: | Sensors and Actuators B: Chemical. 271:300-305 |
| ISSN: | 0925-4005 |
| Popis: | A planar microwave sensor based on a coplanar waveguide (CPW) loaded with a circular split ring resonator (SRR) was developed for the detection and estimation of salts, sugars and organic acids in aqueous solution. The magnitudes of the spectra at resonance frequencies of 2.3–2.6 GHz were shown to provide a rapid and reliable way to measure concentrations of materials such as sucrose, sorbitol, glucose, fructose, CaCl2, NaCl, KCl, MgCl2, Na2CO3 and citric acid. We generated linear and nonlinear regression prediction models built from correlations between the magnitudes of the transmission coefficient (S21) and concentration of materials using coefficient of determination (R2). Principle component analysis (PCA) method was used for discrimination of liquid solution samples. The studies clearly showed sample concentrations in the range from 4 to 20% (w/V) were correlated with the magnitude of S21 and could be detected by using the proposed sensor. Aqueous solution samples could be discriminated into two groups based on magnitude of the spectra of S21 of different solutions at various concentrations. The proposed device can be used to distinguish between organic and inorganic materials in aqueous solution. |
| Databáze: | OpenAIRE |
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