Acta Chimica Sinica ›› 1995, Vol. 53 ›› Issue (4): 386-391. Previous Articles     Next Articles

Original Articles

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

曹忠;林辉概;王世华;王彬锋;杜冬花;俞汝勤   

  1. 湖南大学化学化工系
  • 出版日期:1995-04-15 发布日期:1995-04-15

An array of piezoelectric crystal sensors applied to recognizing functional group in mixed vapour of organic solvents

CAO ZHONG;LIN HUIGAI;WANG SHIHUA;WANG BINFENG;DU DONGHUA;YU RUQIN   

  • Online:1995-04-15 Published:1995-04-15

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 beverages.

Key words: PATTERN RECOGNITION, ARRAYS

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