Recently, the State Planning Commission, the state health planning department of food went to Fujian province to study the modification of rare earth standards. Tea re standard, over the years to the Fujian tea industry caused great harm, resulting in Fujian tea in the business encountered everywhere humbled. According to the tea industry, tea industry, the State Planning Commission, said the National Health Planning Commission will be based on the results of basic research and risk assessment, research and revision of rare earth limited standards, and soon after the introduction of new rare earth standards.
What is the standard
& nbsp; & nbsp; according to academician of the Chinese Academy of engineering, the famous tea experts Chen Zongmao introduction, rare earth is atomic number from the special flexible joint structure, a new and high efficiency of the lanthanides and similar and properties of lanthanide elements yttrium, scandium, a total of 17 elements, in nature to oxide or oxygen-containing acid salt form of minerals. China is a big country of rare earth resources, accounting for 41.36% of the world's rare earth resources. The elements of the plant body are influenced by soil, climate, and so on. 2300mg/kg soil of Zhongshan walnut rare earth content weathering granite and schist, the common soil is 3mg/kg. The tea tree is absorbed more and less to cerium. The different positions of tea plant, the absorption of rare earth is also different, generally speaking, root > stem > old leaf > leaf > petiole > bud head, therefore, to mature leaves and old leaves as raw material made of tea, its rare earth content is generally higher than the tea leaves made of bud.
GB2762-2005 "s in 2005, the standard of rare earth is 2mg/kg; the formal implementation of the GB2762-2012 in June 2013, for the careful disposal of rare earth limited issue, after deliberation, the current standard of rare earth. Since then, a lot of tea producing areas in the tea industry has exceeded the serious phenomenon, the tea industry has called for many.
Effect of rare earth on human
what is the effect of rare earth on the human body? Chen Zongmao believes that the amount of rare earth elements beneficial to health, rare earth has anti coagulation, anti tumor, anti atherosclerosis, anti-inflammatory sterilization, treatment of burns and other functions; and if the excess intake of rare earth elements, will damage the brain, increase liver and kidney burden, damage immune function, affect the female reproductive function, damage to heart function, causing blood components, radiation and many acute poisoning. Although rare earth has a good or bad effect, but the International Food Code Commission CAC, Australia, New Zealand, Japan, the United States and the Taiwan region of China are not specified in the food of rare earth element management requirements.
Chen Zongmao had a special experiment. He said of 2.25% per person per day maximum amount of tea drinking 13 grams, tea rare largest content 13.8mg/kg, leaching rate by oolong tea and the maximum leaching rate of 62%, then the people a day through the tea intake and the amount of rare earth maximum 128.34 micrograms, only accounted for daily permissible intake 0.84%& mdash. According to the provisions of WHO, where the intake below the prescribed value of 5%, the evaluation of the compound is safe.
Rare earth standard will change or
these years, domestic experts on the standard of rare earth and what kind of standards of the dispute has not stopped.
recently, the State Planning Commission, the State Health Planning Commission, a line to Fujian to study the standard of rare earth tea. In Fuzhou and Anxi, research, relevant experts and tea enterprises declaimed that rare earth standard of tea is not reasonable, bring great harm to the tea enterprises.
on the tea of rare earth and other pollutants limited problem, the State Planning Commission, said that in 2013, has been commissioned by the national food safety risk assessment center to carry out research work on rare earth. Has completed a part of the work, the next step will continue to further research. The State Planning Commission will study and revise the results of basic research and risk assessment.
