. 2020 Apr 29;9(5):541. doi: 10.3390/foods9050541

Table 3.

Volatile components identified in the headspace of dried hop cones harvested from 15 varieties cultivated in the Marche region (Central Italy).

Peak ID	RT (min)	RI	CI Parent and Base Ions	Name	CAS Number	Category
V1	6.616	919	145 [M + 1]	isobutyl isobutyrate	97-85-8	Ester
V2	6.773	926	137 [M + 1]	tricyclene	508-32-7	Monoterpene hydrocarbon
V3	6.947	934	137 [M + 1]	α-thujene	2867-05-2	Monoterpene hydrocarbon
V4	7.119	942	137 [M + 1]	α-pinene	80-56-8	Monoterpene hydrocarbon
V5	7.472	957	137 [M + 1]	camphene	79-92-5	Monoterpene hydrocarbon
V6	8.147	983	137 [M + 1]	β-pinene	127-91-3	Monoterpene hydrocarbon
V7	8.356	991	127 [M + 1]. 109 [M + 1 − H₂O]	6-methyl-5-heptene-2-one	110-93-0	Ketone
V8	8.510	996	137 [M + 1]	β-myrcene	123-35-3	Monoterpene hydrocarbon
V9	8.810	1009	137 [M + 1]	α-phellandrene	99-83-2	Monoterpene hydrocarbon
V10	8.957	1015	158 [M]	2-methylbutyl isobutyrate	2445-69-4	Ester
V11	9.044	1019	158 [M]	isoamyl isobutyrate	2050-01-3	Ester
V12	9.105	1022	137 [M + 1]	α-terpinene	99-86-5	Monoterpene hydrocarbon
V13	9.251	1028	145 [M + 1]	methyl heptanoate	106-73-0	Ester
V14	9.332	1032	143 [M + 1]	heptenoic acid isomer. methyl ester		Ester
V15	9.413	1035	137 [M + 1]	β-phellandrene	555-10-2	Monoterpene hydrocarbon
V16	9.594	1043	137 [M + 1]	(Z)-β-ocimene	3338-55-4	Monoterpene hydrocarbon
V17	9.859	1054	137 [M + 1]	(E)-β-ocimene	3779-61-1	Monoterpene hydrocarbon
V18	10.147	1065	137 [M + 1]	y-terpinene	99-85-4	Monoterpene hydrocarbon
V19	10.203	1067	159 [M + 1]	heptanoic acid. 2-methyl. methyl ester	51209-78-0	Ester
V20	10.808	1090	159 [M + 1]	heptanoic acid. 6-methyl. methyl ester	2519-37-1	Ester
V21	10.883	1092	137 [M + 1]	terpinolene	586-62-9	Monoterpene hydrocarbon
V22	10.931	1094	143 [M + 1]	2-nonanone	821-55-6	Ketone
V23	11.152	1102	137 [M + 1 − H₂O]	linalool	78-70-6	Oxygenated monoterpene
V24	11.726	1128	159 [M + 1]	methyl octanoate	111-11-5	Ester
V25	11.862	1134	137 [M + 1]	alloocimene	7216-56-0	Monoterpene hydrocarbon
V26	12.173	1147	137 [M + 1]	Unidentified		Monoterpene hydrocarbon
V27	13.390	1195	157 [M + 1]	2-decanone	693-54-9	Ketone
V28	13.549	1201	157 [M + 1 − CH₂]	n-dodecane	112-40-3	n-alkane
V29	13.846	1215	171 [M + 1]. 139 [M + 1 − CH₃OH]	methyl x-nonenoate		Ester
V30	14.129	1227	173 [M + 1]	methyl nonanoate	1731-84-6	Ester
V31	14.638	1250	187 [M + 1]	heptyl isobutanoate	2349-13-5	Ester
V32	15.749	1295	171 [M + 1]	2-undecanone	112-12-9	Ketone
V33	15.874	1300	171 [M + 1 − CH₂]	n-tridecane	629-50-5	n-alkane
V34	16.092	1311	185 [M + 1]. 153 [M + 1 − CH₃OH]	methyl 4-decenoate	1191-02-2	Ester
V35	16.443	1328	187 [M + 1]	methyl decanoate	110-42-9	Ester
V36	17.100	1358	205 [M + 1]	α-cubebene	17699-14-8	Sesquiterpene hydrocarbon
V37	17.208	1362	205 [M + 1]	sativene	3650-28-0	Sesquiterpene hydrocarbon
V38	17.610	1380	205 [M + 1]	ylangene	14912-44-8	Sesquiterpene hydrocarbon
V39	17.711	1384	205 [M + 1]	α-copaene	3856-25-5	Sesquiterpene hydrocarbon
V40	18.717	1432	205 [M + 1]	b-caryophillene	87-44-5	Sesquiterpene hydrocarbon
V41	18.879	1440	205 [M + 1]	β-cubebene	13744-15-5	Sesquiterpene hydrocarbon
V42	19.463	1468	205 [M + 1]	humulene	6753-98-6	Sesquiterpene hydrocarbon
V43	19.787	1483	205 [M + 1]	b-copaene	18612-33-4	Sesquiterpene hydrocarbon
V44	19.844	1486	205 [M + 1]	(E)-b-Famesene	18794-84-8	Sesquiterpene hydrocarbon
V45	19.916	1489	205 [M + 1]	α-Farnesene	502-61-4	Sesquiterpene hydrocarbon
V46	20.095	1497	205 [M + 1]	b-selinene	17066-67-0	Sesquiterpene hydrocarbon
V47	20.212	1503	205 [M + 1]	α-muurolene	31983-22-9	Sesquiterpene hydrocarbon
V48	20.276	1506	205 [M + 1]	α-selinene	473-13-2	Sesquiterpene hydrocarbon
V49	20.626	1524	205 [M + 1]	γ-muurolene	30021-74-0	Sesquiterpene hydrocarbon
V50	20.784	1532	205 [M + 1]	α-cadinene	11044-40-9	Sesquiterpene hydrocarbon
V51	20.844	1535	205 [M + 1]	b-cadinene	523-47-7	Sesquiterpene hydrocarbon
V52	20.986	1543	205 [M + 1]	cadina-1.4-diene	16728-99-7	Sesquiterpene hydrocarbon
V53	21.090	1548	205 [M + 1]	(E)-calamenene	40772-39-2	Sesquiterpene hydrocarbon
V54	21.210	1554	205 [M + 1]	α-calacorene	21391-99-1	Sesquiterpene hydrocarbon
V55	22.057	1595	203 [M + 1 − H₂O]	caryophillene oxyde	1139-30-6	Oxygenated sesquiterpene
V56	22.356		203 [M + 1 − H₂O]	Unidentified		Oxygenated sesquiterpene
V57	22.567		203 [M + 1 − H₂O]	Unidentified		Oxygenated sesquiterpene

RT, retention time; RI, Kovats retention index (DB-5 equivalent column); CI, chemical ionization experiment.