I'd like to know a method to extract free amino acids from small
(5-100 mg) amounts of plant leaf tissue. These will than be
derivatized and analyzed by either HPLC or GC. I would particularly
like to know the best way to clean up the extracts, to remove
background contaminants, in as small a working volume as possible
before derivatization. This is because I will need to process a large
number of samples.