Table 6. Changes in acetic acid of peach vinegar during fermentation period at various initial pH and temperature
(unit: mg/100 mL)

pH Temperature (°C) Fermentation period (days)
0 3 6 9 14
pH 3 20 444.9±10.61)a2) 921.0±1.9b 1,088.6±3.0c 2,856.5±19.3d 5,912.5±16.5b
30 444.9±10.6a 1,015.2±3.2a 3,406.2±4.2a 5,551.7±15.0a 5,668.4±13.7c
35 444.9±10.6a 723.6±1.2d 912.2±4.2e 693.3±0.6h 2,516.6±2.6f
pH 4 20 324.4±3.5b 577.3±1.6f 1,015.2±11.6d 4,376.4±116.0b 6,171.3±220.3a
30 324.4±3.5b 785.9±0.6c 2,785.7±47.1b 4,289.6±21.7c 4,659.1±39.7e
35 324.4±3.5b 577.4±29.5f 485.1±0.5i 1,095.9±1.6f 4,897.2±24.5d
pH 5 20 307.0±1.2c 602.9±1.6e 817.3±1.9f 931.1±9.0g 4,589.6±7.9e
30 307.0±1.2c 712.0±0.6d 785.6±3.8g 2,721.5±5.5e 4,578.8±7.7e
35 307.0±1.2c 579.4±1.5f 548.9±1.2h 507.0±0.3i 460.0±5.7g
Data values were expressed as mean±SD of triplicate determinations.
Values followed by the same letter are not statistically different by Duncan’s multiple range test (p<0.05).