Toxic anions of mineral substances (1. LF UK, NT)

Nitrates and nitrites
Soubor:vznik_nitrosaminu.jpg
 * the highest content can be found in vegetables and root crops
 * trace amounts in fruit (melons, bananas)
 * lethal dose 32 mg/kg
 * formation of methemoglobinemia: Hg (Fe 2+ ) + NO 2 - → MHg (Fe 3+ ) + NO
 * first symptoms at a MHb concentration of 6–8% of the total Hg content
 * formation of carcinogenic nitrosamines

Classification of nitrate values

 * with a high content (over 1000 mg·kg -1 )
 * lettuce, endive, spinach, chard, Beijing and Chinese cabbage, radish, radish, celery, rhubarb, sweet corn
 * with medium content (250–1000 mg·kg -1 )
 * Cabbage, cabbage, cauliflower, eggplant, parsley, carrots, broccoli, garlic, potatoes
 * low content (below 250 mg·kg -1 )
 * Brussels sprouts, onions, tomatoes, peas, cucumbers, artichokes, asparagus

Links

 * Metal contamination
 * Food toxicology
 * Industrial substances

Source
Category :Nutritional therapyHygiene