Abstract
The inhibitory effect of water-tailored natural deep eutectic solvents (NADES) constructed from citric acid and trehalose with different amounts on the quality deterioration and oxidation of frozen-thawed (F-T) mirror carp (Cyprinus carpio L.) surimi was studied. NADES was obtained by citric acid to trehalose and the effect of moisture addition (v/v) on the structure, physicochemical, and anti-freezing capacity of NADES was assessed. NADES+10% H2O has relatively low viscosity (25%) and strong freezing resistance. However, a 50% H2O addition leads to the disappearance of the hydrogen bond. The addition of NADES effectively inhibits water loss, migration, and mechanical damage on F-T surimi. An inhibitory effect of 4% (w/w) NADES on oxidation was verified by a decrease in carbonyl contents (17.4%, 8.63%) and TBARS (37.9%, 15.2%) of surimi compared with control (P<0.05) and sucrose+sorbitol after 5F-T cycles, suggesting the potential of NADES as a cryoprotectant for the food industry.
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