Characterization of Key Odorants in Soy Sauce and Their Concentration Changes during Storage

Table 3

The concentrations of aroma-active compounds in HLFSS during storage.

Nos	Compounds	Concentrations (μg/L)^a
		S1	S2	S3	S4	S5	S6	S7	S8	S9
1	Isobutanol	11930 ± 2b	10963 ± 182c	10683 ± 220cd	10624 ± 1cde	12385 ± 15a	10143 ± 26e	10343 ± 33de	12431 ± 55a	10378 ± 40de
2	Butanol	22204 ± 38d	22305 ± 18d	22598 ± 234c	21292 ± 61e	24087 ± 77a	23888 ± 23a	20721 ± 15f	23438 ± 14b	19536 ± 17g
3	3-methyl-1-butanol	4771 ± 99f	5434 ± 133d	4612 ± 92g	4595 ± 547g	5193 ± 24e	5590 ± 67b	5157 ± 12e	5771 ± 108a	5492 ± 140c
4	Methylpyrazine	354 ± 1ab	354 ± 0.7ab	354 ± 0.6ab	355 ± 0.2ab	357 ± 0.6ab	359 ± 0.4ab	359 ± 0.4b	360 ± 0.5a	361 ± 0.1a
5	Acetoin	2765 ± 27b	2841 ± 5a	2511 ± 12e	2688 ± 10c	2776 ± 12b	2581 ± 22d	2324 ± 0.2g	2409 ± 5f	2307 ± 5g
6	Acetol	46319 ± 218g	48312 ± 2e	46786 ± 431f	49757 ± 65d	48690 ± 283e	54467 ± 58b	50813 ± 418c	56263 ± 333a	54261 ± 178b
7	2,5-dimethylpyrazine	73.2 ± 2c	73.7 ± 0.2d	68.0 ± 3g	69.0 ± 2f	66.3 ± 12i	77.1 ± 2a	76.4 ± 2b	67.5 ± 0.1h	71.2 ± 0.8e
8	2,6-dimethylpyrazine	131 ± 5h	143 ± 3f	136 ± 2g	147 ± 1e	137 ± 2g	166 ± 21b	153 ± 12d	160 ± 3c	182 ± 3a
9	Ethyl lactate	3715 ± 20d	3705 ± 7f	3704 ± 22f	3704 ± 6g	3716 ± 70d	3798 ± 10a	3735 ± 64b	3711 ± 7e	3728 ± 119c
10	1-hydroxy-2-butanone	18617 ± 189a	9245 ± 10d	8711 ± 132i	9064 ± 20g	9469 ± 0.8b	9181 ± 27e	8947 ± 20h	9322 ± 6c	9148 ± 12f
11	2-ethyl-6-methylpyrazine	30.2 ± 0.1g	32.4 ± 0.6e	25.3 ± 3h	40.2 ± 0.4d	32.7 ± 3f	47.7 ± 0.8c	49.6 ± 1b	52.5 ± 3a	52.4 ± 1a
12	2,3,5-trimethylpyrazine	8.53 ± 0.1d	9.20 ± 0.1c	9.35 ± 0.1c	9.42 ± 0.5c	8.36 ± 0.4d	11.4 ± 1a	10.2 ± 1b	9.81 ± 1c	8.04 ± 1d
13	Acetic acid	238250 ± 2138ab	227963 ± 213ab	216250 ± 4038ab	240375 ± 438ab	261250 ± 2363ab	254250 ± 238b	255988 ± 163ab	287925 ± 1013a	257825 ± 113ab
14	Methional	3139 ± 89e	3163 ± 48e	3113 ± 15f	3549 ± 148c	3876 ± 13a	3575 ± 46c	3490 ± 26d	3673 ± 92b	3569 ± 2c
15	2-acetylfuran	356 ± 0.1bc	350 ± 0.5d	347 ± 2f	347 ± 1e	357 ± 0.9ab	359 ± 1a	354 ± 0.2c	357 ± 0.5ab	358 ± 0.5ab
16	Propionic acid	2459 ± 10e	2435 ± 10f	2444 ± 12ef	2553 ± 5d	2689 ± 3c	2677 ± 22c	2729 ± 2b	2842 ± 5a	2839 ± 7a
17	Isobutyric acid	946 ± 10i	958 ± 18h	964 ± 6g	972 ± 14f	1000 ± 48e	1020 ± 12d	1030 ± 16c	1046 ± 18b	1048 ± 16a
18	Phenylacetaldehyde	69.2 ± 0.1i	74.4 ± 0.4h	77.2 ± 0.9g	86.3 ± 0.4f	99.0 ± 0.3e	110 ± 1d	112 ± 1c	123 ± 1b	132 ± 0a
19	γ-butyrolactone	4356 ± 19g	4336 ± 83g	4365 ± 51g	4378 ± 6f	4400 ± 7e	4644 ± 24d	4808 ± 5c	4875 ± 17b	4940 ± 28a
20	Furfuryl alcohol	1918 ± 63i	2884 ± 2g	1923 ± 177h	2915 ± 66f	4727 ± 38e	6398 ± 63c	6232 ± 58d	6796 ± 43b	6953 ± 39a
21	3-methylbutanoic acid	227 ± 3g	237 ± 0.9f	211 ± 21i	219 ± 18h	395 ± 24c	409 ± 10b	382 ± 4d	415 ± 11a	367 ± 10e
22	Methionol	5879 ± 64a	5143 ± 10i	5241 ± 17f	5175 ± 42h	5201 ± 44g	5394 ± 62d	5453 ± 4c	5488 ± 45b	5379 ± 110e
23	2(5H)-furanone	245 ± 5g	249 ± 4f	280 ± 4b	257 ± 2d	285 ± 14a	258 ± 2d	252 ± 2e	276 ± 22c	257 ± 4d
24	3-methylvaleric acid	106 ± 2g	108 ± 0.2f	89.2 ± 0.4i	94.4 ± 1h	115 ± 0.2e	122 ± 4d	122 ± 2c	124 ± 2b	129 ± 1a
25	4-methylpentanoic acid	313 ± 8g	306 ± 12h	369 ± 44f	377 ± 8e	425 ± 12c	409 ± 36d	425 ± 1c	460 ± 52b	464 ± 4a
26	Methyl cyclopentenolone	51.3 ± 1b	49.7 ± 0.1c	26.5 ± 0.7e	46.6 ± 0.2d	50.4 ± 0.1bc	55.2 ± 2a	49.5 ± 0.9c	49.6 ± 0.2c	47.4 ± 0.2d
27	Guaiacol	109 ± 0.2d	111 ± 0.2cd	109 ± 0.3d	112 ± 0.2bcd	114 ± 0.2abcd	115 ± 0.7d	116 ± 0.1abc	118 ± 0.3a	117 ± 0.3ab
28	Phenethyl alcohol	7338 ± 46a	6897 ± 3b	6276 ± 34g	6005 ± 41h	6551 ± 27d	6849 ± 47c	6419 ± 17f	6466 ± 14e	5890 ± 14i
29	Maltol	5790 ± 259c	5716 ± 99d	5095 ± 115f	4975 ± 101g	6025 ± 68b	6704 ± 150a	6074 ± 14b	5728 ± 2d	5449 ± 93e
30	2-acetylpyrrole	1521 ± 8h	1967 ± 13g	2093 ± 31f	2640 ± 17e	3215 ± 27d	3965 ± 21c	3981 ± 39c	4255 ± 4b	4519 ± 0.3a
31	4-ethyl-2-methoxyphenol	889 ± 10a	822 ± 10d	825 ± 5c	738 ± 2h	805 ± 14e	841 ± 10b	796 ± 2f	791 ± 1g	726 ± 10i
32	HDMF	101325 ± 731b	118188 ± 544ab	126525 ± 388ab	142431 ± 606ab	155000 ± 631ab	170763 ± 294a	167538 ± 238ab	163856 ± 5975a	157806.25 ± 356ab
33	HEMF	207441 ± 741	183404 ± 985	165525 ± 2762	151762 ± 471	151842 ± 549	149782 ± 582	133002 ± 610	115190 ± 119	103763 ± 330
34	4-ethylphenol	258 ± 8b	233 ± 5bc	233 ± 2c	219 ± 5cd	233 ± 25cd	236 ± 11cd	247 ± 0.3e	230 ± 8de	238 ± 0.8e
35	Sotolon	547 ± 3a	519 ± 9d	525 ± 10d	539 ± 9f	508 ± 3d	508 ± 3c	494 ± 2b	465 ± 4e	448 ± 5c
36	Phenylacetic acid	1799 ± 29a	1611 ± 12d	1452 ± 18c	1513 ± 31b	1598 ± 17e	1743 ± 5e	1503 ± 10f	1467 ± 9g	1268 ± 1h
37	Ethyl vanillate	206 ± 2b	183 ± 2d	174 ± 1g	168 ± 1f	170 ± 2e	180 ± 2c	163 ± 1f	161 ± 1g	132 ± 1h

^aThe average concentration of aroma-active components in HLFSS obtained from three parallel experiments’ data. ^ba–i means different alphabets in the same row which indicate significant differences ().