Table 2.
Changes in pH, total soluble solids (TSS), and total titratable acidity (TTA) in untreated (control), blanching, HPP (600 MPa for 3 min, 20 °C), and blanching combined with HP-treated carrot juice during 15 days of storage at 4 °C.
| Quality Attributes | Treatments | Storage Time (Days) | |||||
|---|---|---|---|---|---|---|---|
| 0 | 3 | 6 | 9 | 12 | 15 | ||
| pH | Control | 6.15 ± 0.10 aA* | 6.23 ± 0.10 aA | 5.91 ± 0.10 cB | 5.82 ± 0.10 bC | 4.37 ± 0.10 dD | 4.27 ± 0.10 dE |
| Blanching | 5.84 ± 0.10 cB | 5.87 ± 0.10 cB | 6.06 ± 0.10 bA | 6.00 ± 0.13 aA | 5.60 ± 0.07 cC | 5.42 ± 0.10 cD | |
| HPP | 6.00 ± 0.10 bC | 6.12 ± 0.10 bB | 6.23 ± 0.05 aA | 6.15 ± 0.15 aAB | 6.17 ± 0.18 aAB | 5.81 ± 0.10 bC | |
| Blanching + HPP | 5.59 ± 0.10 dD | 5.76 ± 0.10 dC | 5.94 ± 0.08 cAB | 5.90 ± 0.10 bAB | 5.84 ± 0.25 bBC | 5.98 ± 0.20 aA | |
| TSS (°Brix) |
Control | 2.03 ± 0.10 aA | 2.00 ± 0.10 aA | 1.97 ± 0.10 aAB | 1.83 ± 0.10 aB | 1.23 ± 0.10 bC | 1.23 ± 0.10 bC |
| Blanching | 2.07 ± 0.12 aA | 1.93 ± 0.10 abA | 1.97 ± 0.10 aA | 1.93 ± 0.10 aA | 1.57 ± 0.10 aB | 1.13 ± 0.10 bC | |
| HPP | 1.83 ± 0.10 bA | 1.88 ± 0.10 bcA | 1.93 ± 0.10 aA | 1.83 ± 0.10 aA | 1.63 ± 0.10 aB | 1.60 ± 0.10 aB | |
| Blanching + HPP | 1.73 ± 0.10 b AB | 1.82 ± 0.10 cAB | 1.90 ± 0.10 aA | 1.90 ± 0.10 aA | 1.63 ± 0.10 aB | 1.63 ± 0.10 aB | |
| TTA (%) |
Control | 0.027 ± 0.001 bE | 0.025 ± 0.006 bE | 0.043 ± 0.003 aD | 0.058 ± 0.001 aC | 0.150 ± 0.011 aB | 0.162 ± 0.002 aA |
| Blanching | 0.027 ± 0.001 bC | 0.032 ± 0.002 aC | 0.032 ± 0.003 aC | 0.040 ± 0.002 bB | 0.042 ± 0.001 bB | 0.084 ± 0.001 bA | |
| HPP | 0.032 ± 0.001 aC | 0.037 ± 0.002 aB | 0.041 ± 0.003 aA | 0.040 ± 0.002 bAB | 0.038 ± 0.002 bB | 0.039 ± 0.001 cAB | |
| Blanching + HPP | 0.028 ± 0.002 bC | 0.037 ± 0.002 aB | 0.046 ± 0.003 aA | 0.041 ± 0.001 bAB | 0.040 ± 0.001 bB | 0.038 ± 0.001 cB | |
* All data were the means ± standard deviation of three replicates (n = 3). a–d: different letters in the same column indicate significant differences (p < 0.05); A–E: different letters in the same row indicate significant differences (p < 0.05).