食品中痕量低分子量挥发性有机物高效富集及表面增强拉曼光谱现场分析新技术研究

项目名称： 食品中痕量低分子量挥发性有机物高效富集及表面增强拉曼光谱现场分析新技术研究

项目编号： No.21275168

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 张卓旻

作者单位： 中山大学

项目金额： 83万元

中文摘要： 挥发性有机物（VOCs）常温下极易挥发逃逸、不易富集，复杂样品中痕量低分子量VOCs高效富集新技术研究是样品预处理领域的难点之一。研发高选择性低分子量VOCs富集新方法，并结合相应便携快速分析技术，是实现低分子量VOCs快速、准确、定量现场分析的关键。本项目拟针对食品中痕量甲醛、乙烯、乙醇等低分子量VOCs，基于无机晶体-高聚物掺杂、双金属催化、纳米复合金属氧化物等新型气体吸附材料设计合成高选择性低分子量VOCs富集介质，构建痕量低分子量VOCs高选择性富集采样新方法 ；结合自制采样装置及便携的表面增强拉曼（SERS）仪器，建立食品中甲醛、乙烯及乙醇等痕量低分子量VOCs快速、准确、定量现场分析新技术，并实际用于食品运输储藏、发酵酿造等过程中痕量低分子量VOCs的实时准确定量分析。通过本项目有望研发食品中低分子量VOCs现场定量分析新技术，并实际用于食品安全分析。

中文关键词： 低分子量挥发性有机物；高效富集；表面增强拉曼光谱；现场分析；食品

英文摘要： It is difficult to enrich low molecular weight volatile organic compounds (VOCs) due to their extremely strong volatility at room temperature. Study of novel efficient enrichment techniques for trace low molecular weight VOCs in complicated samples is one of bottle necks in the field of sample preparation. The key to achieve rapid, accurate, quantitative on-site analysis of low molecular weight VOCs lays on the development of novel enrichment methods with high selectivity coupled with corresponding portable rapid analytical technique. In this project novel enrichment media with high selectivity and related enrichment-sampling techniques for low molecular weight VOCs in food will be developed based on some novel gas absorption materials such as inorganic crystals - polymer doped, bimetallic catalyst, nano composite metal oxide material. The target VOCs focus on trace formaldehyde, ethylene and ethanol which take great concern in field of food security analysis. Combined with homemade sampling devices and portable surface enhanced raman scattering (SERS) instrument, new on-site analytical techniques for the rapid, accurate and quantitative analysis of formaldehyde, ethylene and ethanol in food samples will be established. The new on-site analytical techniques will be actually used for the real-time and accurate qu

英文关键词： Low molecular weight volatile organic compounds；Efficient enrichment；Surface enhanced raman scattering；On-site analysis；Food