Portable oral malodor analyzer using highly sensitive In2O3 gas sensor combined with a simple gas chromatography system
| Autor: | Takeshi Itoh, Hiroshi Koda, Takahiro Okabayashi, Kazuo Onaga, Mariko Hanada, Hideo Miyazaki, Katsuyuki Tanaka |
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| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Spectrum analyzer Chromatography Hydrogen sulfide Analytical chemistry Biochemistry Analytical Chemistry Highly sensitive Semiconductor detector chemistry.chemical_compound chemistry Environmental Chemistry Volatile organic compound Gas detector Gas chromatography Sensitivity (electronics) Spectroscopy |
| Zdroj: | Analytica Chimica Acta. 475:27-35 |
| ISSN: | 0003-2670 |
| Popis: | A portable oral malodor analyzer was developed for quantitative detection of volatile sulfur compounds (VSCs) in mouth air using a combination of a semiconductor gas sensor and a compact gas chromatography system. We found that In 2 O 3 doped with Au is the optimum sensing material of the gas sensor for obtaining a high sensitivity to measure all the VSCs in mouth air with low concentration ranges. A specific column design, simple sampling system and signal processing method were applied for achieving a portable analyzer without using a standard pressurized carrier gas. This analyzer can easily measure the concentration of essential components of oral malodor individually and quantitatively over a wide range from 50 to 1000 ppb (v/v). |
| Databáze: | OpenAIRE |
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