Rare tea stringent limits have become barriers to the development of China's tea industry

Recently, according to informed Beijing Food and Drug Administration , "southern " Iron Goddess of Mercy , four kinds of food sampling failure , where " southern" Iron Goddess of Mercy traced REE exceeding three times , with immediate effect to stop the sale . When a rare occurrence associated with tea , tea RE always worry about whether the public health effects of excess . Each sampling on the rare earth content of tea , the tea will be China 's unique " rare earths limits " push "cusp " aroused public concern .

May 5, 2014 , by the national food safety risk assessment center organization held in Beijing , " China Rare Earth Elements in dietary exposure assessment embodiment seminar" on the issue of rare earth on the status of tea again attention and discussion . The seminar, national food safety risk assessment center Academician Chen Junshi , Peking University, Academician Wang Kui participants , various experts from the CDC , medicine, agriculture and the tea fields of nearly 30 participants.

At the meeting, the Vice President Tea House Yang Xiufang invited to make the status quo rare tea , tea extraction rate of the causes and results of special reports for non- tea tea experts fully understand the current situation of rare earth in order to further promote the scientific and rational tea rare national standards .

Rare , also known as rare earth elements, is the periodic table Ⅲ B family atomic number from 15 kinds of lanthanides 57-71 , and its electronic structure and chemical properties similar scandium (Sc) and yttrium (Y), a total of 17 kinds of chemical collectively known elements. Usually lanthanum, cerium , praseodymium , neodymium, promethium , samarium, europium , gadolinium called light rare earth elements ; terbium , dysprosium, holmium , erbium, thulium, ytterbium , lutetium, scandium called heavy rare earth elements . Our country is the country 's most abundant rare earth resources , rare earth is mainly used for high-tech industrial, defense, medical , etc., but also to promote the use of appropriate concentrations of rare earth elements for plants to absorb nutrients , conversion and utilization. As the mining of rare earth , rare earth elements as fertilizer, feed additives , and the widespread use of rare earth elements are widely used in medicine , environmental pollution increasing REE , easily lead to enrichment of the food chain , and then enter the body.

China's rare earth standards for a limited amount of tea , from the national mandatory standards in 2005 the Ministry of Health promulgated the " contaminants in foods ," the standard for tea made ​​of rare earth oxide content limit requirement that limits tea corn ( 2368,1.00,0.04 % ) , rice same should be less than 2.0 mg / kg. June 2013 GB2762-2012 formally implemented , it is prudent for the disposal of rare limited edition issue , after deliberation , they will not cancel the current standard in rare limited targets . It is understood that , at present , the United States , European Union, Japan, the tea set standards were not rare limited targets . Since then, the country appeared excessive mature leaves and old leaves serious phenomenon as raw material made ​​of tea, Chashi was jittery .

Present different sectors of China's rare earth industry standard views . Many tea industry experts and even the State Department , the attitude of the tea RE standards are unclear . Rare tea products due to excessive levels affected the tea export volume . In the industry, tea tea prices have been plagued by rare earths limits .

Public concern is unique to our country is the lack of current testing standards of rare earth science, RE excessive drinking tea , there is what kind of impact on health. The authorities are currently unable to determine whether excessive harmful rare . Only Shanghai Institute of Metallurgy Research issued a document " Trace REE efficacy and health effects ," said: studies have shown that long-term low -dose REE if ingested , can accumulate in the liver , causing liver morphology and pathological changes in liver cell damage liver metabolic disorder caused by fatty liver ; while higher doses of 2mg still rare cause of agricultural development in the liver cells and red blood cell DNA damage through the placental barrier .

In 2012, Chinese Academy of Engineering , the famous tea experts Chen Zongmao Zhu Wen said China's rare earth standard was unreasonable that this standard does not fully investigated based on plants, especially rare earth content in the background did not grasp the value of tea . From now mastered the content of tea in tea can be seen there is such a high standard to prove that this ratio exceeds the standard is set too low , at normal levels of tea . Secondly , the standard promulgated by the rare earth colorimetric determination is recommended , but this method is not mature , the measurement results do not reflect the normal concentration levels . Chen Zongmao believe that such a standard could not perform in production. If implemented, China's tea industry will put the brink of collapse .

April 4, 2014 , Chen Zongmao academicians participated in 2014 in Anxi tea quality and safety training general meeting revealed that tea rare limited release since the implementation of the standard , has been the industry's concern that the current standard is being re-evaluated rare , is expected to change by the end .

On Rare Earth standards, the researchers said Yang Xiufang tea Dean said: rare earth content in different conditions and new dynamics of rare teas showed little tea in the growth process will be enriched in rare earth elements , rare earth content of tea on the high part of the high maturity ; different levels of rare earth content of tea brewing tests showed that by brewing tea into an extremely small amount of rare earth content , the proposed risk assessment relax tea rare limited edition .

A rare tea our unique national standard , the tea industry for many tea companies are currently too harsh , so merchants exception worried. This standard was used as a basis for prohibiting the export of tea , have seriously affected the export of Chinese tea . Tea industry sectors should be actively called for promoting tea rare risk assessment as soon as possible to develop a more scientific and reasonable limits rare earth , both to protect the health of consumers , but also with the healthy development of tea industry needs .


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