Table 4. Correlation coefficients between the volatile groups and resistance ratio of six metal sensors of electronic nose
Major volatile group
Sensor
T30/1
P10/1
P10/2
P40/1
T70/2
PA2
Aldehydes
0.34
*
0.32
0.33
*
0.33
0.34
*
0.36
*
Hydrocarbons
0.56
***
0.55
***
0.56
***
0.56
***
0.56
***
0.58
***
Pyrazines
0.61
***
0.58
***
0.59
***
0.59
***
0.61
***
0.63
***
Sample size for each quality grade (n=6).
p<0.05
p<0.001.