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