Bromate

limits for not more than 0.01 mg / l

2008 years 12 months, AQSIQ and National Standardization Management Committee issued a GB 8537-2008 "drinking natural mineral water" and GB 8538-2008 "natural mineral water drinking test" two national standards, the implementation time of the former 1 October, 2009, which is the time for implementation of April 1, 2009.

drinking natural mineral water contains a wide range of essential trace elements and minerals in the salt, and fresh water or drinking water in general, there are strict distinction. China promulgated and implemented in 1987, the national standards "for drinking natural mineral water", in 1995 the standards were last revised, the amendment also introduced a new standard.

"natural mineral water to drink," the contents of the new national standard changed?

new GB main changes are as follows: to improve the definition of natural mineral water; boundaries to remove an indicator (bromide); limit indicators increased four (antimony, manganese, nickel, bromate), to amend 4 (cadmium, arsenic, boron, fluoride), the deletion of 4 (lithium, strontium , iodide, zinc); pollution index increased 2 (Anion synthetic detergent, mineral oil), a modified (nitrite); 3 increased microbial indicators (fecal streptococci, Pseudomonas aeruginosa and gas pod Membrane Clostridium perfringens), the deletion of a (the total number of colonies).

why the increase in the new national standard indicators of bromate limit?

the subject of a new country is the biggest bright spot in an increase of microbial bromate and three indicators, while the total number of the deletion of the colony.

new national standard indicators of the increase in bromate limit is the production of drinking water disinfection process using ozone as a by-product produced, the water in normal circumstances bromate-free, but when the raw water contains bromide compounds, and the production process and the use of ozone disinfection sterilization, the bromide and the ozone oxidation reaction will generate bromate. Bromate has been the international cancer research institutions as a potential carcinogen 2b-class, long-term consumption of high-bromide salt content in drinking water, will increase the incidence of cancer.

ago, very few domestic enterprises to carry out sterilization using ozone, in recent years, the use of mineral water enterprises ozone sterilization process, with the result that highlights the phenomenon of bromate. AQSIQ bottled water recently carried out national monitoring bromate special random sampling 104 kinds of bottled water, there are 13 kinds of products bromate concentration of more than "drinking water health standards," the limited requirements. At the international level, the World Health Organization (WHO) and the United States Environmental Protection Agency (EPA) drinking water provided for, the maximum allowable concentration of bromate in the 0.01mg / L or less, the new national standard in the indicators with the World Health Organization standards.

the subject of a new country to increase microbial indicators 3, by deleting one, why?

GB new microbial indicators in an increase of fecal streptococci, Pseudomonas aeruginosa and Clostridium perfringens 3, by deleting a total number of colonies with the aim first, and the international standards, and the other is to control the production process of mineral water bromate production.

national drinking water standards, will have the total number of microbial indicators as the most important colony of the mandatory targets, and the World Health Organization (WHO), United States Environmental Protection Agency (EPA) standards, such as the latest of pathogens increasingly stringent control, but the total number of bacteria will not appear in the standards. GB new additions and deletions of microbial indicators is a reflection of international standards, by lowering standards rather than the total number of colonies, in fact, more stringent requirements of enterprise production and process control to achieve a higher level.

GB mineral water has been strictly limited to the total number of bacteria per ml may not be more than 50, the total number of colony failed is a sampling of drinking water the main reason for failure. It is precisely because of the strict limit the total number of colonies, which was a lot of mineral water producers headache , in production in order to control the total number of colonies and increased the amount of ozone, but also increases the risk of bromate generated. The total number of new colonies GB deletion, generated by ozone disinfection of bromate issue will be resolved to some extent.

(Author: National drinking water quality Supervision and Inspection Center)