DISCRIMINATION OF WINE VINTAGES;
PATTERN RECOGNITION;
SENSOR ARRAYS;
D O I:
10.1016/0925-4005(95)85178-X
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
A sensor array formed by a number of metal-oxide semiconductor gas sensors has been utilized for the recognition of complex chemical patterns characterized by small differences from each other. The system has been applied to the recognition of different vintage years of the same kind of wine. The sensors are fabricated adopting different materials in order to endow the array with a broad sensitivity spectrum and to avoid the occurrence of duplication of single-sensor performance. The obtained array shows a satisfactory discrimination among different vintages. The principal-component-analysis technique has been proved to be suitable for the extraction of the pattern features from the array's data set. An intriguing correlation between the recognition performance of the array and a particular technique adopted for wine fabrication has been found.