What does it mean to be rich in selenium? What kind of produce can be processed
Selenium-rich products are agricultural products and processed products with significantly higher content of selenium than normal by natural environment or by means of artificial technology. Selenium, as a necessary trace element of the human body, has physiological functions such as resistance to oxidation, increased immunity and the protection of the cardiovascular environment. According to our standards (e. G. Gh/t 1135-2024), selenium content in selenium-rich agricultural products is subject to a specific threshold, for example, for foods ranging from 0. 15 to 0. 50 mg/kg and vegetables ranging from 0. 15 to 1. 00 mg/kg. The following are the main categories of agricultural products that can be certified as rich in selenium and the main points of certification:
I. Types of agricultural products that can be certified as rich in selenium
Food
Representative products: rich rice, wheat, maize, etc。
Characteristics: the conversion of inorganic selenium into organic selenium (e. G., selenium proteins) through soil application of selenium fertilizer or leaf-covered selenium spray technology to increase bioavailability。
Certification criteria: total selenium content is 0. 15 to 0. 50 mg/kg and organic selenium is 65%。
Fruit and vegetables
Vegetables: beryllium-rich garlic, tomatoes, potatoes, prune-dry (e. G. 0. 377 mg/kg test selenium content)。
Fruits: selenium-rich apples, grapes, citrus, etc., absorb selenium through roots or leaves。
Certification criteria: vegetable beryllium content 0. 15-1. 00 mg/kg, edible bacteria 0. 15-5. 00 mg/kg。
Livestock products
Eggs: selenium-rich eggs (e. G., xen-eun salt eggs), with organic selenium added by feed (e. G., selenium yeasts), can be 3 to 5 times as high as ordinary eggs。
Meat/milk products: selenium-rich beef, chicken and milk, to ensure the safety of feed-based herring sources, with a milk content of 0. 075 ~ 0. 15 mg/kg。
Specialized cash crops
Tea: fossil tea (e. G. Hsu nwu family taigon tea) with selenium content of 0. 25 to 4. 0 mg/kg and produced from the soil area (ph 4. 5 to 6. 5)。
Medicines/eating fungus: richen rohango, quisumu, mushrooms etc. Use microbiological conversion techniques to increase the proportion of organic selenium。
Processed food
(b) deep-processed products: rich selenium flour, black tea (e. G., xen eun-bek tea), beans products (e. G., rich tofu in new fields)。
Ii. Core processes and requirements for certification of selenium-rich products
Basis of authentication
National standards: gh/t 1135-2024 selenium-rich agricultural products, rb/t 138-2023 technical guidelines for certification of selenium-rich products。
Conditions for application
Qualifications: enterprises need food production permits and small farmers can apply jointly through cooperatives。
Environmental certification: provision of soil selenium testing reports (effective for 2 years), certification of water compliance for irrigation/processing。
Management system: establish a record-keeping, quality-retroactive system for the use of selenium sources and operate for at least three months。
Authentication process
Application: submission of business licences, production of base drawings, pre-screening reports of selenium content, etc。
On-site inspection: certification bodies conduct on-site verification of the production environment, processes and management systems, synchronized sample inspection。
Testing and certification: sample selenium content and form (ratio of organic selenium) need to be met and a valid certificate issued for three years after approval。
Follow-up monitoring: subject to annual supervision and review and periodic product testing reports。
Cost and cycle
Cost: single-product certification of approximately $5,000-15,000; 15% discount if combined with organic certification。
Cycle: regular 30-45 days, accelerated processing reduced to 20 days (30 per cent increase)
Attention and common error zones
The content is not as high as possible: an overdose of selenium may be toxic (e. G., food > 0. 5 mg/kg exceeding the standard) and packaging shall be marked as “limited consumption”。
Prohibition of false propaganda: the certified product may only indicate the content of selenium and may not claim the effect of “climate-proofing”, etc., and the offender is subject to high fines。
Technical options: prioritize the use of organic selenium fertilizers (e. G. Biosilver fertilizers) to avoid the risk of contamination of inorganic selenium (e. G. Sodium selenate) due to the narrow safety threshold。
Iv. Value of selenium-rich agricultural products and regional cases
Health values: selenium supplementation reduces the risk of cyanosis, osteoporosis and supports metabolism against oxidation。
Economic benefits: a significant premium for certified products (e. G., 80% - 100% higher than normal eggs)。
Success stories:
(b) hu bei xenn county: the development of selenite tea, selenite ham, with a value of over billions yuan a year, is based on the natural wealth of selenium soil (51. 9 per cent of the land level)。
Hunan shinda county: 60 per cent of the soil is rich in selenium, with the construction of landmark products such as soybeans “triple chili” for export to hong kong, australia and south-east asia。
The certification of selenium-rich products is an important route to the quality of agricultural products, covering a wide range of food, fruit and vegetables, livestock, tea and deep-processed products. Strict control of selenium content standards, improved production systems and improved competitiveness based on policy dividends (e. G. Coding certification of landmark products) are required. For farmers or enterprises, “naturally rich selenium area advantage + technological innovation + compliance certification” can significantly increase product value addition and market recognition。
