压电晶体传感器阵列用于混合有机溶剂蒸气中官能团的识别  

An Array of Piezoelectric Crystal Sensors Applied to Recognizing Functional Group in Mixed Vapour of Organic Solvents

作　　者：曹忠[1] 林辉概[1] 王世华[1] 王彬锋[1] 杜冬花 俞汝勤[1] 

机构地区：[1]湖南大学化学化工系,长沙410082

出　　处：《化学学报》1995年第4期386-391,共6页Acta Chimica Sinica

基　　金：国家自然科学基金;中国科学院长春应用化学研究所电分析实验室资助项目

摘　　要：为模拟生物化学传感体系,提出了可用于识别有机官能团的传感器阵列,用作人工气味识别系统.该阵列由八个压电晶体传感器组成,每个传感器涂以具有广谱响应性能的不同吸附活性材料.阵列对常见小分子有机溶剂混合蒸气的响应频移数据采用逐步判别分析(SDA)处理,选出五个供信能力最佳的判别变量,以此构成的阵列用于小分子有机溶剂混合蒸气中醇羟基、羰基与其它官能团的识别;并采用主成分分析(PCA)法降维投影,在二维空间含相同官能团的物质聚为一类;阵列可用于酒类、软饮料的识别.To simulate the biochemical sensor system, an artificial odour-sensing system based on a sensor array for recognizing organic functional groups has been constructed. The array consisted of 8 piezoelectric crystal sensors, each coated with an adsorptive material with unselective, but different response characteristics. The frequency shift data obtained from the array as the response to mixed vapour of common organic solvents of small molecular size were treated by using stepwise discrimination analysis (SDA), and five coatings that provided the maximum level of analyte discriminating ability were selected. The array constructed from these solvents was applied to recognizing alcoholic hydroxyl, carbonyl from other organic functional groups. The principal component analysis (PCA) was applied to the original and autoscalled data. The two-dimensional display of the data showed well-defined clusters for solvents containing different functional groups separated from each other. The array was applied to identifying spirits and bevetages.

关 键 词：阵列 有机官能团 识别 生物化学传感器 模拟 PCS 

分 类 号：O656.35[理学—分析化学] O657.1[理学—化学]