Quantification result of amine/phenol compounds in different flavor of Baijiu samples (mean ± standard deviation)

No.NameSauce flavor (n = 5)Strong flavor (n = 4)Light flavor (n = 6)P value
1Serine35,550.79 ± 888.855,858.38 ± 492.571,931.11 ± 113.520.011*
2Threonine7,891.51 ± 651.034,304.49 ± 160.472,451.41 ± 197.440.827
32-Aminoacetic acid7,017.45 ± 197.091,130.18 ± 105.83946.76 ± 70.370.077
4Alanine29,084.91 ± 1,022.824,458.02 ± 329.442,017.54 ± 152.80.001*
55-Aminopentanoic acid1,371.82 ± 94.442,950.72 ± 246.0861.94 ± 3.670.002*
62-Aminobutanoic acid312.92 ± 1.3532.63 ± 0.6237.49 ± 0.480.104
72-(Methylamino)acetic acid4,350.97 ± 518.891,208.32 ± 77.341,180.54 ± 90.660.001*
8Proline28,889.48 ± 1045.968,376.64 ± 646.046,764.32 ± 556.850.001*
9Ile-Val231.46 ± 19.2061.41 ± 13.83NQ0.001*
10Octan-1-amine2,122.98 ± 951,798.9 ± 117.671,848.48 ± 125.850.609
11Ornithine1,612.06 ± 7.96252.33 ± 0.79192.88 ± 2.670.949
12Butan-1-amine45.23 ± 2.8723.31 ± 1.8025.44 ± 2.090.755
13Peonol1,556.96 ± 63.35,307.81 ± 357.8781.88 ± 8.650.007*
142-PhenylethylamineNQNQNQ-
152-Vanillin48,982.32 ± 1,194.8116,045.59 ± 669.612,904.81 ± 125.160.001*
16Syringic aldehyde334.95 ± 30.642,070.11 ± 2,393.69311.10 ± 12.220.372
17Pentan-1-amine32.92 ± 12.5084.34 ± 8.3848.83 ± 3.020.246
18Tyramine419.91 ± 18.70227.67 ± 23.53195.22 ± 10.480.198
19Coniferaldehyde190.85 ± 27.57226.43 ± 34.48127.57 ± 18.630.811
204-Hydroxycinnamic Acid486.88 ± 35.353,247.54 ± 269.01286.03 ± 15.150.325
21Phenol5.19 ± 0.203.57 ± 0.183.11 ± 0.180.002*
22Tyrosine43,887.19 ± 1,619.574,246.4 ± 216.782,221.39 ± 109.230.024*
23Hexan-1-amine8.6 ± 0.028.74 ± 0.139.37 ± 0.590.441
24Lysine18,271.58 ± 483.121,539.31 ± 90.611,468.75 ± 86.450.108
254-Allylsyringol3,722.24 ± 164.466,766.26 ± 316.15413.78 ± 39.030.009*
26Heptan-1-amine19.16 ± 1.041.45 ± 0.104.69 ± 0.320.362
274-Hydroxybenzaldehyde10,965.37 ± 16,311.024,989.17 ± 0.001,054.25 ± 0.000.110
28Octopamine62.64 ± 14.67NQNQ0.135
294-Ethylphenol189.72 ± 11.3418.99 ± 1.49NQ0.001*
30Dodecan-1-amineNQNQNQ-

* P < 0.05. NQ: compounds that were not detected or the content was below the LLOQ; -: none. The unit of concentration was ug/L