Table 2 The color values of Shepherd’s purse leaf by freezing and thawing methods
| Treatment | Freezing method | Thawing method | Color |
| L* | a* | b* | △E |
| Raw | | | 44.12±2.64 | -4.75±1.15 | 13.45±2.53 | - |
| Blanched | | | 35.67±1.37 | -5.60±0.94 | 9.21±1.42 | - |
|
| Blanched | -20°C | 25°C | 35.76±1.69b | -3.34±1.03 | 5.29±1.78B | 4.98±1.58A |
| Running water | 35.64±1.16Ab | -3.13±1.32A | 4.67±1.98B | 5.51±1.77A |
| Radiofrequency | 36.42±1.54Aa | -3.61±1.66A | 5.77±2.73B | 4.95±1.97A |
|
| -40°C | 25°C | 35.15±1.18a | -3.53±1.49 | 5.35±1.76B | 5.04±2.21Ab |
| Running water | 34.14±1.74Bb | -3.32±1.05A | 5.19±1.27B | 5.15±1.67Aa |
| Radiofrequency | 33.98±1.55Bb | -3.40±1.64A | 5.39±2.39B | 5.37±1.98Aa |
|
| Immersion (-60°C) | 25°C | 34.89±1.41a | -4.26±1.23 | 6.56±1.58A | 3.62±1.46Bb |
| Running water | 34.87±1.95Aa | -4.20±1.14B | 6.26±1.64A | 4.06±1.52Bb |
| Radiofrequency | 33.47±1.63Bb | -4.75±1.15B | 7.33±1.81A | 3.76±1.40Ba |
Values in the same column with different superscript letters on freezing method were significant differences (p<0.05) by ANOVA with Duncan's multiple rage test.
Values in the same column with different superscript letters on thawing method were significant differences (p<0.05) by ANOVA with Duncan's multiple rage test.