碩士 / 國立中興大學 / 食品暨應用生物科技學系所 / 99 / To assure the corruption degree of the products and keep the consumers away from healthy risks. My research is to develop a freshness gas sensor which composed of non-toxic, adsorptive, and gelling-property chitosan solutions to entrap pH indicators bromocresol green (BCG) for monitoring freshness index - trimethylamine (TMA). The freshness gas sensor with the potential as an alternative for the traditional analysis methods, which required expensive instruments and complicated steps.
The sensing components can generate obvious color change depended on the TMA concentrations. Response time is 50 minutes to 0.05-0.25 mg TMA detection, and it just needs 15 minutes to monitor TMA in the range of 1.0-5.0 mg. The devices elevate stability by covering hydrophobic and biocompatible high-molecular gel- polydimethylsiloxane (PDMS). The sensing components with PDMS as protector layers put at 25℃ for 3 days, was still reproducible to detect TMA effectively.
The fish freshness was monitored by the sensing components, and compared with TMA concentrations determinations by HPLC. The freshness gas sensor with the advantages of long-term continuous detection and accumulative amounts to show monitored results. Its non-destructive, sampling without pump and rapid response time properties, with the potential as an alternative for the traditional destructive analysis methods.
| Identifer | oai:union.ndltd.org:TW/099NCHU5253050 |
| Date | January 2011 |
| Creators | Pei-Tze Lin, 林佩姿 |
| Contributors | 蔡碩文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 100 |
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