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

Nitrates and nitrites

 * 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

 * DAVÍDEK, Jiří. 8. MINERÁLNÍ LÁTKY [online]. [cit. 2016-07-06]. < https://el.lf1.cuni.cz/p31423111/ >.


 * DAVÍDEK, Jiří. 14. KONTAMINANTY POTRAVIN [online]. [cit. 2016-07-06]. < https://el.lf1.cuni.cz/p92009169/ >.


 * MAREŠOVÁ, Věra. Ekotoxikologie. Kovy. Průmyslové látky [online]. [cit. 2016-07-06]. < https://el.lf1.cuni.cz/p79657934/ >.

Category :Nutritional therapyHygiene