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folic acid interference with ferrous fumarate or sulphate

Posted: Sat Oct 17, 2020 9:51 pm
by pnrrdl
Dear all,

I am working in a company who produces vitamin-mineral premixes:
In our laboratory we have HPLC to batch control of vitamins...

Somehow we noticed that Ferrous Fumarate or Ferrous Sulphate (premix also contains iron) mask or decrease folic acid around 60%.
Does anyone familiar with this problem? Is it a masking or is it a decreasing?
Thanks in advance.