Browning prevention method for fresh apple juice
An anti-browning and fruit juice technology, which is applied in the field of food processing, can solve the problems of research and reporting on the browning of ultrasonic freshly squeezed apple juice, and achieve the effects of inhibiting browning, high efficiency, and overcoming easy browning
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Embodiment 1
[0019] Embodiment 1. A method for preventing browning of freshly squeezed apple juice. Freshly squeezed apple juice is placed in a low-temperature constant temperature tank, the temperature in the low temperature constant temperature tank is controlled at 25°C, and it is treated with a probe-type pulsed ultrasonic wave (20khz, 10mm probe). , the specific settings are as follows: the probe is inserted 1cm below the freshly squeezed apple juice, the height of the freshly squeezed apple juice is maintained at 4cm, the pulse time is 3s, the duty cycle is 66.7%, and the sound intensity is 544.59W / cm 2 , processing time 5 minutes.
Embodiment 2
[0020] Embodiment 2. A method for preventing browning of freshly squeezed apple juice. Freshly squeezed apple juice is placed in a low-temperature constant-temperature tank, and the temperature in the low-temperature constant-temperature tank is controlled at 0° C., and treated with a probe-type pulsed ultrasonic wave (20khz, 10mm probe) , the specific settings are as follows: the probe is inserted 1cm below the freshly squeezed apple juice, the height of the freshly squeezed apple juice is maintained at 5cm, the pulse time is 5s, the duty cycle is 50%, and the sound intensity is 300W / cm 2 , processing time 6 minutes.
Embodiment 3
[0021] Embodiment 3. A method for preventing browning of freshly squeezed apple juice. Freshly squeezed apple juice is placed in a low-temperature constant-temperature tank, the temperature in the low-temperature constant-temperature tank is controlled at 35° C., and treated with probe-type pulsed ultrasonic waves (20khz, 10mm probe) , the specific settings are as follows: the probe is inserted 1cm below the freshly squeezed apple juice, the height of the freshly squeezed apple juice is maintained at 6cm, the pulse time is 7s, the duty cycle is 90%, and the sound intensity is 70W / cm 2 , processing time 10 minutes.
[0022] Freshly squeezed apple juice without any follow-up treatment was used as control 0.
[0023] The ultrasonic treatment in Example 1 was canceled, that is, the freshly squeezed apple juice was placed at 25° C. for 5 minutes, as control 1;
[0024] The ultrasonic treatment in Example 2 was canceled, that is, the freshly squeezed apple juice was placed at 0° C....
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