Table 2.

Success rate in the simultaneous identification and quantification of vapours (%) using the steady state sensor response. Validation results are reported. The optimal value of parameter C is also shown.

Pre-processing	TGS 800	TGS 822	TGS 826	All sensors
None	2.2 C = 10	8.6 C = 10	10.9 C = 103	37.7 C = 10
Mean-centring	13.3 C = 103	24.0 C = 103	11.3 C = 103	53.8 C = 10
Auto scaling	13.4 C = 103	19.1 C = 103	11.1 C = 104	42.6 C = 10