Table 1.

Results of the substance identification of common terpenes and terpene alcohols of the hop variety Citra

Number	Name (molecular mass)	EI-MS		IMS
		Retention timeMS (min)	Match quality valueMS	Retention timeIMS (min)	Drift times (RIPrel)* (K0 [cm2/Vs])**
1	α-Pinene (136.23 g/mol)	5.47	90	5.52	1.258, 1.745, 1.767, 1.818 (1.630, 1.175, 1.160, 1.128)
2	β-Pinene (136.23 g/mol)	6.11	93	6.17	1.258, 1.735, 1.808 (1.630, 1.182, 1.134)
3	β-Myrcene (136.23 g/mol)	6.23	91	6.30	1.258, 1.769, 1.795 (1.630, 1.159, 1.142)
4	Limonene (136.23 g/mol)	6.82	38	6.88	1.258, 1.736, 1.795 (1.630, 1.181, 1.142)
5	Linalool (154.25 g/mol)	7.78	46	7.87	1.258, 1.736, 1.787 (1.630, 1.181, 1.147)
6	β-Caryophyllene (204.36 g/mol)	12.11	96	12.32	1.494, 1.586 (1.372, 1.293)
7	α-Humulene (204.36 g/mol)	12.56	90	12.82	1.552 (1.321)

*The drift times are normalized to the reactant ion drift time

**K₀ $=K\left(\frac{273}{T}\right)\left(\frac{P}{760}\right)$ with $K=\frac{L}{t_{\mathrm{d}}E}$, where L is the drift tube length (cm), t_d is the drift time (s), E is the electrical field (V/cm), T is the drift tube temperature (K), and P is the pressure inside the drift tube (Torr)