The invention discloses a preparation method for red dates by
microwave vacuum drying, and red dates prepared thereof. The method comprises the following steps: pretreatment of the red dates,
microwave vacuum drying of the pre-treated red dates and packing the red dates which undergoes
microwave vacuum drying. The step of microwave vacuum
drying to the red dates is as follows: the red dates are put in a microwave vacuum dryer, and the sectional microwave vacuum
drying is carried out on the red dates; in the early stage of
drying, the degree of vacuum in the drying chamber is maintained between 2 kPa to 15 kPa, the
microwave power is selected between 1W / g to 5W / g, the drying temperature is controlled below 50 DEG C, and the
drying time ranges from 10 min to 30 min; and in the later stage of drying, the degree of vacuum in the drying chamber is maintained between 2 kPa to 15 kPa, the
microwave power is reduced to a magnitude of 0.5W / g to 3W / g, the
drying time lasts for 20 min to 60 min, and the
water content of the dried red dates ranges from 5 percent to 16 percent. The preparation method has rapid drying, is highly effective, energy-saving, environment-friendly and sanitary, can effectively maintain the original color,
aroma, taste, active ingredients and the
nutrient content of the red dates and provides the high-quality microwave-vacuum-dried red dates.