Winter to eat hot pot is a pleasant thing, there are a lot of people like to drink hot soup. However, there are claims that will produce hot pot soup cook for a long time after nitrite, a carcinogenic drink. Long cooking soup pot will nitrite lot? Hot pot soup can drink it?
Indeed there will be hot soup nitrite, nitrite and nitrate may come from the decomposition products, but mainly from the food when added Shabu-shabu, especially plant-based ingredients. Nitrite can be dissolved into the water in the pot when cooking, food nitrite will dissolve into the soup.
Nitrogen is an essential element of plant growth, plants absorb nitrogen in the environment in vivo ultimate synthesis of amino acids, but also produces nitrates. Some reductase in plants, part of the nitrate will be reduced to nitrite, so all in all plant foods contain nitrite, nitrite in vegetables is about 4mg / kg. Moreover, with the extension of the period of storage ingredients, fresh vegetables nitrite content will be increased because of bacterial activity.
And fresh fish and meat in the nitrite content is generally low. However, we are now eating some meat, such as ham, bacon, etc., because the process uses nitrite, nitrite levels will be slightly higher. In the national standard, the cooked meat in the nitrite residues in Asia is not more than 30 kg or 70 mg, and pickled vegetables in sauce residue standards are not more than 20 milligrams per kilogram.
So, exactly how much soup pot nitrite do? The study found that with the cooking time increases, the nitrite content in the soup pot it will certainly increase. Guangxi Medical University, Nanning and Nanning Shifangyizhan had six large pot city conducted a survey and found that hot pot soup nitrite content of 1.01 mg / L, and rinse after (45-90 minutes) pot tail soup nitrite content averaged 1.34mg / L. Shanghai Pudong New Area Food and Drug Authority had on the market some of the soup pot shop was sampling, they select the most we eat four pot: pot cabbage soup, seafood soup pot, soup bones and duck pot bottom of the pot, rinse dishes also includes all the usual favorite vegetables, soy products, meat, animal offal, seafood and fungi and the like. Respectively 15,30,60 and cook for 90 minutes was measured and found that the longer the cooking time, the higher the nitrite content in the soup before eating soup pot average nitrite concentration is 1.69mg / L, and cook for 90 minutes after an average of 8.9mg / L, the highest content of sauerkraut soup pot bottom soup nitrite reached 15.73 mg / L. As can be seen, compared with processed meats and pickles, hot pot soup nitrite is not high.
Go back to the previous question: hot pot soup can drink it? Nitrite is a toxic substance, with acute toxicity. When the body can intake of large doses of nitrite in vivo formation of hemoglobin oxygen methemoglobin and lose the ability to cause the body tissue hypoxia, such as intake of 200-500 mg, 10 minutes there will be symptoms such as vomiting, abdominal pain, cyanosis , breathing difficulties, more than 3 grams can be lethal. However, to achieve its toxic dose (200 mg), the highest value measured 16mg / L calculation, almost drink 12.5 liters of hot soup will achieve this dose. But most people when eating hot pot, until the finished basic eat very little soup, even soup, a small bowl of it is difficult to achieve this dangerous amount.
Nitrite itself is not carcinogenic, however, nitrite and protein decomposition products may react to produce carcinogenic nitrosamines under acidic conditions. The human stomach pH suitable for the formation of nitrosamines, it may increase the risk of gastric cancer. Therefore, JECFA (Joint Expert Committee on Food Additives) will be evaluated on its nitrite ADI (acceptable daily intake) as 0.07mg / kg (calculated to nitrite ions), for a body weight of 60 kg adults, equivalent to 4.2 mg. After 90 minutes to cook the highest nitrite-containing sauerkraut soup pot bottom in terms of (nitrite content of 16mg / L), about 300 milliliters, which is a bowl. This day is considered safe limits drink only so much risk. In fact, most people do not eat every day pot, it will not always drink a lot, so the risk to drink hot soup will not be great. However, the hot pot soup nitrite indeed be more, and the fat content of fat soup pot is generally not low, it was suggested not drink.
(Author: Ruan Guangfeng)
references
GB 2760-2011 national food safety standards of food additives using standard
GB 2762-2012 National Food Safety Standard Food Contaminants Limited
Zheng Yanyan, Li apprenticeship, Li Lu, Guo Song Chao. Soup pot detection of nitrite and nitrate content of Guangxi Medical University, 1999, 16 (2).
Wang Suwen nitrite content of the investigation pot cooking Shanghai Journal of Preventive Medicine, 2005,17 (8): 364-365.
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