Use of ethylene sensor indicating quality of horticulture products during storage

• Main Authors: Ling-chieh Chen, 陳伶婕
• Other Authors: Shaun Chen
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/70287344597754872597

碩士 === 輔仁大學 === 食品科學系碩士班 === 103 === Horticultural products are rich in bioacitive compounds, such as lycopene and anthocyanins. Those phytochemicals lead to bright colors, and impart good antioxidant capacity. The aims of this study were to use an ethylene sensor in intelligent package to indicate quality of horticultural products during storage. The ethylene sensor was prepared using molybdenum, palladium and tin ions, and immobilized on surface-modified LDPE, then applied to horticultural products. Packaged banana and tomato exposed to ethyelen or 1-MCP during storage, and Phalaenopsis exposed to ethylene during transportation for 0.5 - 4 hrs were accomplished, and quality attributes of appearance, texture and flowering were analyzed from those horticultural products during storage. Bioactive compounds, including solvent extracted lycopene and anthocyanins, were then subjected to HPLC for identification and quantification. Results showed that ethylene was produced in banana package during storage, what caused ripeness including weight loss, texture softening, discoloration and Brix increase. However, ripening was significantly suppressed in the presence of 1-MCP. Increase of color development (ΔE) on sensor was found corresponding to ethylene content, indicating the ethylene sensor is effective to monitor banana storage quality. Ethylene exposure resulted to fewer lycopene formation in tomato, resulting in less peel redness during ripening. Additionally, no significant difference between air and ethylene-treated tomatos from color development on ethylene sensor was found. Phalaenopsis exposed to ethylene for 2 and 4 hr led to significantly increase the percentage of withered flowers, and lower cyanidin contents. Those conditions caused ΔE on sensor to 3.68 and 6.79, respectively, indicating the sensor is effective to monitor flowering life of Phalaenopsis in vase. Conclusively, ethylene sensor composed of multi-metal ions is efficacy for ethylene detection, and determination of horticultural product quality.