Testing Sunflowers for Aluminium (Aluminum)

Greetings.

I am on the hunt for any new methods for reliable testing
sunflowers/sunflower seeds for there levels of Aluminium (Aluminum).

I have discovered that the most common method seems to be testing soil
pH. Using the 1:5 method. But is there not any detailed studies that
can be used to study the plant itself?

Thanks.