Freezing Preservation of Fresh Antarctic Krill (Euphausia superba)

It is well known that the frozen raw krill exudes a lot of drip and develops darkening discoloration during thawing. In order to reduce drip loss and prevent the development of darkening discoloration of frozen krill on thawing, some special pretreatments were employed and the following results were obtained. For frozen-thawed Antarctic krill, pretreatments with the mixture of 3% NaCl and 1.0% sodium erythorbate or 0.2% polyphosphate-2DK (50% Na-polyphosphate, 50% Na-pyrophosphate)and 1.0% sodium erythorbate for 10 minutes at solution temperature below5℃ showed less drip exudation on thawing at both 5℃ and 25℃ than those treated otherwise and no darkening discoloration was observed until the sample were spoiled.