Table 2.

Retention times (± standard deviation ) for eight compounds measured with two different MCC ion mobility spectrometers (IMS) given as mean(s) before alignment

Compound	MCC-IMS 1		MCC-IMS 2		Difference
	Replicates	t R measured mean (s)	Replicates	t R measured mean (s)	Mean t R Ni03-mean t R Ni07
2-Hexanone	43	6.67 ± 2.13	19	5.25 ± 0.57	1.42
2-Heptanone	45	11.38 ± 2.94	19	10.04 ± 0.47	1.34
2-Octanol	45	22.27 ± 5.28	19	23.05 ± 1.09	−0.78
d-Limonene	34	24.16 ± 6.26	19	25.79 ± 2.93	−1.63
1-Octanol	45	38.06 ± 9.18	19	43.16 ± 1.8	−5.1
2-Nonanone	45	40.85 ± 10	19	45.56 ± 1.29	−4.71
1-Decanol	41	200.25 ± 21.24	17	253.09 ± 8.56	−52.84
2-Undecanol	23	252.74 ± 40.95	16	303.93 ± 13.91	−51.19

2-Nonanone was used as the alignment substance.