Preparation and application of secondary refrigerant for ultrasonic wave dipping fruits and vegetables
A technology of immersion freezing and cooling agent, which is applied in the field of fresh-keeping processing. It can solve the problems of affecting the quality of food freezing, poor stability, volatility and high viscosity of the cooling agent, and achieve color stability, liquid stability, and lower freezing point temperature. Effect
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Embodiment 1
[0023] A refrigerant used for ultrasonic-assisted quick-freezing of fruits and vegetables, the content of each component is based on the total mass percentage of the refrigerant, calcium chloride 15%, edible ethanol 15%, phytic acid 1%, vitamin C 1%, xylose Alcohol 5%, glucose 5%, and the balance is water. Stir the above raw materials evenly to prepare the above-mentioned refrigerant. After testing, the freezing point of the solution is -36.6°C, and the corresponding kinematic viscosity at -25.2°C--22.5°C is 9.636-6.82mm 2 / s, the volatilization rate is 2.36%g / day, and it is suitable for immersion freezing at a working temperature above -35°C.
Embodiment 2
[0025] A refrigerant used for ultrasonic-assisted quick-freezing of fruits and vegetables, the content of each component is based on the total mass percentage of the refrigerant, calcium chloride 15%, edible ethanol 17%, phytic acid 0.75%, vitamin C 1.5%, xylose Alcohol 5%, glucose 6%, and the balance is water. Stir the above raw materials evenly to prepare the above-mentioned refrigerant. After testing, the freezing point of the solution is -43.1°C, and the corresponding kinematic viscosity at -25.9°C~-19.1°C is 15.664~7.557mm 2 / s, the volatilization rate is 2.81%g / day, and it is suitable for immersion freezing at a working temperature above -40°C.
Embodiment 3
[0027] A refrigerant used for ultrasonic-assisted quick-freezing of fruits and vegetables, the content of each component is based on the total mass percentage of the refrigerant, calcium chloride 15%, edible ethanol 20%, phytic acid 0.5%, vitamin C 2%, xylose Alcohol 5%, glucose 8%, and the balance is water. Stir and mix the above raw materials to prepare the above-mentioned refrigerant. After testing, the freezing point of the solution is -51.3°C, and the corresponding kinematic viscosity at -25.4°C~-17.0°C is 19.844~8.03mm 2 / s, the volatilization rate is 2.82%g / day, and it is suitable for immersion freezing at a working temperature above -50°C.
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