Testing for antioxidant capacity and polyphenolic content of tea?

Conducting full antioxidant capacity test and polyphenolic content of leaf infusions; any labs out there that can carry this out effectively?

Busy developing a tea and require technical expertise in the above stated.

Here is a good resource to start looking through.

_{Antioxidant tests are conducted basis the radical capturing capacity equivalent to Vitamin c, Tocopherol and there is one more. Polyphenols are done using UV-Vis spectrophotometer. I have my doubts if a routine ISO-17025 certified labs will be able to do this because this is more of a formulation development kind of a testing.}

_{Check with any  contract research lab or research institute. They should be able to help you.}