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When counting, a tablet should be selected between 30 and 300 (the SN standard requires 25 ~ 250 colonies), and if two dilution degree is between 30 and 300.
This according to the requirements of the national standard method, the ratio of the two should be determined, the ratio is less than or equal to the average number, and the ratio is greater than 2. The small number of the ratio (some regulations do not consider the size of the ratio, and the average number is reported).
If all dilution is not in the counting range. If both are greater than 300, the average colonies with the highest dilution degree are reported by the dilution multiple. If it is less than 30, it will be reported by the dilution multiple of the average colonies with a minimum dilution.
If the number of bacterial colonies is greater than 300, and some of which are less than 30, but not between 30 and 300, it should be reported by dilution multiple of the average colonies of the closer to 300 or 30.
Extended information;
The event
In August 2009, the Office of the Food and Drug Safety Committee of Zhengzhou City, Henan Province, announced the total number of Libai mints of mints exceeded the standard.
In October 2009, the website of the State Inspection and Quarantine Administration announced the spot checks on 200 bean products products. There were 18 products who were unqualified as "blacklist". The total number exceeds the standard limit of nearly 70 times.
In August 2010, the Import and Export Food Safety Administration of the State Inspection and Quarantine Administration announced that a number of "Pin" potato chips imported from the United States were found that the total number of colonies exceeded the standard.
In October 2010, the Tianjin Industry and Commerce Administration Bureau announced that the total number of collaterals of "Shanghaojia" Valley essence of "Shanghaojia" Guiwei Food Industry Co., Ltd. exceeded the standard.
In June 2011, the General Administration of Quality Supervision, Inspection and Quarantine announced that the total number of white grape juice drinks produced by Shanxi Wahahachang Sheng Sheng Sheng Sheng Sheng Sheng Shengsheng exceeded the standard.
In August 2011, the total number of colonies such as "Yurun" old Beijing roast duck, "Fujuxing" roast duck, "Dadong Lao Cao" brand roast duck in the entire city of Beijing exceeded the standard.
In October 2011, the Beijing Food Safety Office announced that the Arctic Ocean Double Cream was suspended due to the total number of colonies.
In November 2011, Mengniu's "casual hazelnut chocolate ice cream" was overtaken in the "total number of colonies and colonobacteria" two important microorganisms indicators.
Reference information source; Baidu Encyclopedia-total number of colonies
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The Chinese dairy industry standards are the worst standards in the world; but some people believe that the status quo of the Chinese dairy industry depends on the national conditions. At the same time, it is disclosed that the current standard threshold is low.
Ilobe allowances 2 million per ml- "This is the worst milk standard in the world"
If according to my country's latest milk industry safety standards, the protein content contains 2.95 grams per 100 grams of the original standard, It has fallen to 2.8 grams, which is far lower than the standards of more than 3.0 grams of developed countries; the total number of colonies in each milliliter of milk has increased from 500,000 to 2 million, which is 20 times higher than the 100,000 standards of the United States and the European Union!
If in my country's current dairy industry standards, the maximum value of raw milk bacteria is 2 million/ml. "This is the worst milk standard in the world, and it is the shame of the world's dairy industry!" Wang Dingmian bombarded. "This standard is the worst and lowest standard in the world. The exports of dairy products like some big brands have returned, so they have to export to domestic sales!
Xinjiang Xingnong News:
"Garden" and "Western Spring" brand some milk products' colonies exceeded the period without changing the "please" out of our city
Some batches of garden brand Xiaoda Jujube Yogurt, Garden Brand Strawberry Yogurt Drinks, and Western Spring Brand Fresh Cow Milk were found to be seriously deviated from national standards.
In that within one month starting in May, the Municipal Health Supervision Institute conducted a total of 105 milk products sold in the city's scope of our city. The sampling examination involves 4 categories: sterilization, yogurt, milk beverages, and lactic acid bacteria beverages.
The sampling results show that the total number of colonies with "garden cards" produced by Shihezi Garden Dairy Co., Ltd. (batch number 20050623/4) and "garden brand" strawberry yogurt drink (batch number 20050626/2) are respectively. 210, 240 (the national standard is less than equal to 100), exceeding twice the national standards; the Western Region Spring Brand Fresh Niu milk (batch number 050629) produced by Xinjiang Winhua Livestock Co., Ltd. It is seriously exceeded by the colonic flora. The total number of colonies/(CFU/ML
is 160,000 (national standard less than 300,000), exceeds 5 times the national standard, and the colon flora/
mpn/100ml
is 11000 (national standard less than 90) It exceeds 122 times the national standard, 2.7%of the fat (national standards greater than equal to 3.1%), protein is 2.3%(national standard is greater than equal to 2.9%), non -lipid milk solids are 7.7 %% (national standards are greater than equal to 8.1%of 8.1% ).
The supervisors of the Municipal Health Supervision Institute told reporters that except the above three products, all other sampling products meet national standards. Exit the market in our city.