Characterization of the Key Aroma Compounds in the Fruit of Litsea pungens Hemsl. (LPH) by GC-MS/O, OAV, and Sensory Techniques

Table 1

Odor activity values (OAVs) of aroma-active compounds (FD = 9) in Litsea pungens Hemsl. fruit.

No.	Compounds	CAS	Concentration (µg/kg)	Threshold (μg/kg)	OAV	Standard curves	R²
5	D-Limonene^c	5989-27-5	333,321.19 ± 1,339.09	34 [30]	9803	y = 0.0539x − 0.0014	0.9932
20	3,7-Dimethyl-2,6-octadienal^a	5392-40-5	251,978.13 ± 683.24	30 [31]	8399	y = 0.0851x + 0.0288	0.9936
17	(Z)-3,7-Dimethylocta-2,6-dienal^a	106-26-3	189,366.87 ± 7,528.88	100 [31]	1893	y = 0.074x + 0.0085	0.9958
3	β-Myrcene^a	123-35-3	179,800.17 ± 4,978.31	100 [32]	1798	y = 0.0896x − 0.0085	0.9975
28	(E)-3-Phenyl-2-propenoic acid ethyl^b	4192-77-2	6,913.31 ± 913.99	4 [31]	1603	y = 0.1055x + 0.0146	0.9975
26	β-Caryophyllene^b	87-44-5	76,771.87 ± 1,296.43	64 [30]	1129	y = 0.068x + 0.0212	0.9837
12	Citronellal^a	106-23-0	25,397.45 ± 1,483.47	31 [30]	819	y = 0.0487x + 0.008	0.9972
7	Linalool^a	78-70-6	360,841.19 ± 7,836.63	500 [32]	722	y = 0.073x + 0.0067	0.9944
4	6-Methyl-5-hepten-2-one^a	110-93-0	29,118.53 ± 9,49.40	50 [32]	582	y = 0.094x − 0.0003	0.9999
2	Methional^a	3268-49-3	890.48 ± 177.02	1.8 [33]	494	y = 0.4585x + 0.004	0.995
13	Estragole^b	140-67-0	13,376.54 ± 3,255.45	35 [31]	382	y = 0.0875x − 0.004	0.9964
6	Eucalyptol^b	470-82-6	81,581.26 ± 1,136.85	230 [31]	355	y = 0.0613x + 0.0025	0.9987
11	2-(3-Methyl-2-butenyl)-3-methylfuran^c	15186-51-3	23,794.84 ± 4,610.74	100 [31]	238	y = 0.0384x + 0.0058	0.9979
21	Anethole^b	104-46-1	7,133.33 ± 551.68	50 [31]	143	y = 0.062x + 0.0085	0.9993
23	Eugenol^b	97-53-0	10,249.40 ± 824.78	90 [31]	114	y = 0.0988x − 0.0039	0.9882
18	D-Carvone^c	2244-16-8	6,998.14 ± 682.58	160 [31]	44	y = 0.1175x + 0.0262	0.9936
25	Methyleugenol^b	93-15-2	2,529.33 ± 467.25	68 [31]	37	y = 0.0696x + 0.011	0.9977
9	p-Cresol^b	106-44-5	3,229.82 ± 41.03	100 [32]	32	y = 0.0429x + 0.0248	0.9928
22	Safrole^b	94-59-7	2,328.99 ± 390.14	160 [31]	15	y = 0.0797x + 0.0141	0.9978
16	4-(1-methylethyl)-benzaldehyde^b	122-03-2	2,500.23 ± 157.00	177 [31]	14	y = 0.0612x + 0.0183	0.9961
15	(3Z)-3,7-Dimethyl-2,6-octadien-1-ol^a	106-25-2	3,747.99 ± 643.73	300 [30]	12	y = 0.1214x − 0.006	0.9983
31	Ethyl p-methoxycinnamate^b	24393-56-4	5,422.92 ± 244.75	500 [34]	11	y = 0.1576x + 0.0407	0.9956
30	Caryophyllene oxide^b	1139-30-6	3,829.05 ± 630.81	400 [31]	10	y = 0.0412x + 0.0156	0.9837
27	(+)-2-Bornanone^d	464-49-3	3,802.95 ± 770.73	1360 [31]	3	y = 0.0482x − 0.007	0.9962
1	3-Methyl-butryicacid^a	503-74-2	156.40 ± 3.15	100 [31]	1.5	y = 0.1128x − 0.0033	0.9982
10	Fenchone^c	1195-79-5	97.44 ± 11.68	440 [31]	<1	y = 0.0482x − 0.007	0.9962
14	Carveol^c	99-48-9	665.79 ± 637.26	4000 [35]	<1	y = 0.4792x − 3E−19	0.9999
24	Decanoic acid^a	334-48-5	2,043.84 ± 670.91	2200 [32]	<1	y = 0.084x + 0.0068	0.9943
29	(R)-2-Methyl-5-((S)-6-methylhept-5-en-2-yl)-cyclohexa-1,3-diene^c	495-60-3	9,925.30 ± 535.49	—	—	y = 0.0875x − 0.004	0.9964
19	Phenylacetic acid^c	103-82-2	—		—	—	—
8	(E)-1-methyl-4-(1-methylvinyl)cyclohex-2-en-1-ol^c	7212-40-0	10,040.07 ± 468.85	—	—	y = 0.0765x − 1E − 04	0.9991

The alphabet a, b, c, and d represent compounds calibration by internal standard compounds of 2-octanol, 1,2-dichlorobenzene, and 4′-methylacetophenone, respectively; “—” represents the aroma compounds were lower than the quantitative limitation.