Table 6 pH and drip loss of Shepherd’s purse by freezing and thawing methods

Treatment Package Freezing method Thawing method pH Drip loss (%)
Raw - - - 7.18±0.03
Blanched - - - 8.09±0.08

Blanched Air containing package -20°C 25°C 8.03±0.04 8.01
Running water 8.01±0.09 13.10
Radiofrequency 8.04±0.13 9.53

-40°C 25°C 8.14±0.08 15.35
Running water 8.17±0.03 17.32
Radiofrequency 8.17±0.11 15.07

Immersion (-60°C) 25°C 8.18±0.07 9.88
Running water 8.19±0.07 9.85
Radiofrequency 8.27±0.05 8.94