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Trace Elements

Concentration of elements not exceeding 250 Micro gm per gm of 'matrix

3 groups are:

  1. Essential elements: Iron , iodine ,Zinc, Selenium, Copper. Molybdenum and chromium
  2. Probably essential: Silicon. Nickel .Boron .Vanadium
  3. Potentially toxic elements: some of which may have some essential function al low levels:
    Fluorine, Lead, Cadmium, Mercury, Arsenic

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