Also, there are some plates specifically produced for binding amine to plates, Please see below:
Well-Coated™ Amine Binding plates are maleic anhydride activated plates that react with primary amines to form amide bonds that are stable at pH≥7. Acidic conditions will hydrolyze the bonds releasing the peptide/ligand, therefore binding of peptide/ligand to plates should be performed at pH8-9 and the binding assays or ELISA should be performed at pH≥7.
I attach you the protocol I used in the paper 2006JMV (in my contributions), it is in spanish, any doubt, do not hesitate in contact me again. The brand of the plate and its efficiency is very important, I had differeces among brands and had to use the mor expensive plates, but the worked well.