Accurate judgment method of moisture conversion point of hot air-microwave combined drying of edible fungi based on low-field nuclear magnetic resonance technology

• Main Authors: LI DAJING, LIU CHUNJU, ZHANG ZHONGYUAN, JIANG NING, LIU CHUNQUAN, ZHOU MINGQIAN, SONG JIANGFENG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2020
• Subjects: CHEMICAL RIPENING OF FRUIT OR VEGETABLES; FOODS OR FOODSTUFFS; HUMAN NECESSITIES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT,VEGETABLES, EDIBLE SEEDS; TESTING; THE PRESERVED, RIPENED, OR CANNED PRODUCTS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES

The invention relates to an accurate judgment method of the moisture conversion point of hot air-microwave combined drying of edible fungi based on a low-field nuclear magnetic resonance technology, and belongs to the field of fine and deep processing of agricultural products. According to the method, the change of the transverse relaxation curve of moisture distribution in a hot-air drying process of a fresh edible fungus material is measured through the low-field nuclear magnetic resonance technology, and the moisture conversion point is accurately judged according to the change characteristics of the peak height and the peak width of the main peak with the largest area proportion, so that combined drying efficiency of edible fungi is effectively improved, and loss of nutritional activeingredients of dry products is reduced. When the peak height of the main peak with the largest area proportion in the transverse relaxation curve of moisture distribution is rapidly reduced, and the peak width is rapidly incr