Production method of selenium-rich sweet potato slices

Abstract

The invention discloses a production method of selenium-rich sweet potato slices. The production method comprises preparing a selenium-rich nutrient solution, selecting sweet potato raw materials, immersing the sweet potato raw materials in the selenium-rich nutrient solution, cleaning the sweet potato raw materials, putting the cleaned sweet potato raw materials in a steamer, carrying out steaming for 60-70min until the sweet potatoes are fully cooked, wherein in steaming, sweet potatoes cannot contact with water in the steamer and a cover tightly covers the steamer, unpeeling the sweet potatoes, slicing the sweet potatoes, carrying out dehydration drying, adding organic selenium into the sweet potato slices and carrying out fermentation. In the conventional water spraying humidifying production process on dried sweet potato slices, a L-selenium-methyl selenocysteine nutrient solution is sprayed to the surfaces of the sweet potato slices and the sweet potato slices are subjected to fermentation treatment so that sweet potato slice polysaccharide content is observably improved.

Description

technical field [0001] The invention relates to the technical field of food production, in particular to a method for producing selenium-enriched sweet potato jujube. Background technique [0002] my country is internationally recognized as a major selenium-deficient country, and 72% of the soil is deficient in selenium. According to the survey of the Chinese Nutrition Society, the intake of adults in my country is less than 27ug / d, which is far from the minimum limit of 50ug / d recommended by the Chinese Nutrition Society. Selenium cannot be synthesized in the body and can only be ingested in food; when the total accumulation of selenium in the human body is 15 mg, the intake and excretion maintain a dynamic balance; although the human body needs very little selenium, it cannot be lacking. Selenium participates in various physiological and metabolic activities of the human body, which is of great significance for preventing diseases and improving human immunity. Therefore su...

AI Technical Summary

Problems solved by technology

At present, the method of producing selenium-enriched sweet potato dates is basically to use inorganic substances such as sodium selenate, sodium selenite, and calcium selenate. When producing sweet potato dates, they are added according to the weight ratio, or they are formulated into selenium-enriched nutrients during the cultivation process. Liquid spraying, the above-mentioned sodium selenate, sodium selenite, calcium selenate and other selenium-containing inorganic substances are highly toxic, improper use or cannot be fully and effectively absorbed and transformed by sweet potato dates or sweet potatoes, and their residues are likely to cause harm to the human body

When some selenium-enriched sweet potatoes are cultivated, in order to avoid the residues that are likely to cause harm to the human body, a relatively low amount of inorganic selenium (sodium selenate, sodium selenite, calcium selenate, etc.) is used, and the selenium-enriched sweet potatoes produced contain The amount of selenium does not meet the standard requirements required by the human body