Maleimide Content?

One question I get sometimes is what is the maleimide content of some of our reactive intermediate polymers (AI20, AI50, etc.) the maleimide content can be calculated by comparing the normalized intensity of the PEG peak (~3.6ppm) to the maleimide peak ~(6.6-6.7ppm). Some of these are listed here:

Cat# (Lot#) - Maleimide endcapping %

AI50 (Lot#: 30730JSG) 97% maleimide  

AI48 (Lot#30702JSG) 96% maleimide

AI20 (Lot# 30515JSG-B) 94% Maleimide