Table 1.

Concentration overview of the gas mixture diluted from a calibration gas source containing nine species (second column) in comparison with the measurement results (fourth column).

Compound Name	Calibrated Concentration (ppmv)	Diluted Concentration (Expected, ppmv) *	Measured Concentration (ppmv) **
Ethylene	5000 ± 25	~19.5	19.5 ± 1.73
Ethanol	100 ± 0.5	~0.39	1.55 ± 0.38
Acetaldehyde	100 ± 5	~0.39	1.82 ± 0.64
Methanol	100 ± 1	~0.39	0.71 ± 0.19
Ethyl-acetate	100 ± 1	~0.39	0.60 ± 0.10
Acetone	100 ± 0.5	~0.39	0
1-propanol	100 ± 1	~0.39	N.A.
2-butanone	100 ± 5	~0.39	N.A.
Propylene	100 ± 1	~0.39	N.A.
Propionaldehyde	100 ± 5	~0.39	N.A.

* The uncertainty is obtained by taking the standard deviation of 18 independent measurements with one-minute averaging time. ** Dilution performed by injecting 20 mL of the calibrated source containing nine volatile species into a larger volume of 5.1 L N₂ at atmospheric pressure.