Dear All,

I am Gizem who is in charge of the determination of vitamins by using HPLC.
I am writing in regard to the DAD detector used on HPLC systems. I am trying to find the USP 41/ NF 36 method which is a DAD detector necessary for the determining. Is there someone who has experience on this issue or do you have any application study or method for determination of folic acid in the iron-folic premixes by using HPLC-UV?

Awaiting for your valuable suggestions.

Regards.

Gizem.