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Table 4 Individual phenolic compounds (mg/g) of extract obtained in optimized condition of SCW process (control) and after thermal treatments

From: Optimization of subcritical water extraction of phenolic compounds from Ziziphus jujuba using response surface methodology: evaluation of thermal stability and antioxidant activity

Treatment

Quercetin

Rutin

Ferulic acid

para-Coumaric acid

Chlorogenic acid

Gallic acid

Control

0.54 ± 0.02D

89.29 ± 5.18A

2.41 ± 0.18D

0.05 ± 0.00B

394.97 ± 29.81A

82.17 ± 5.74A

LTLT

0.17 ± 0.01B

83.68 ± 4.92A

2.09 ± 0.21D

0.03 ± 0.00A

383.91 ± 30.15A

82.32 ± 4.98A

HTST

0.27 ± 0.01C

86.03 ± 5.37A

1.12 ± 0.15C

0.08 ± 0.00C

395.41 ± 31.35A

117.19 ± 7.26B

Cooking

ND

86.23 ± 3.68A

0.69 ± 0.08B

0.08 ± 0.00C

399.18 ± 28.45A

115.69 ± 6.72B

Baking

0.24 ± 0.02C

137.07 ± 8.91B

0.59 ± 0.06B

0.13 ± 0.01D

526.30 ± 39.29B

123.38 ± 5.34B

Sterilization

0.04 ± 0.00A

80.86 ± 4.25A

0.19 ± 0.02A

0.05 ± 0.00B

329.69 ± 31.28A

207.73 ± 8.27C

  1. ND not detectable
  2. The similar letters in every column show values are not significant at p < 0.05
  3. Data are mean and SD values. The data were rounded up to two decimal places