Methods for quantatitive measurement of free amide group during coupling of SPPS
 

Hi guys, does anyone here have the references on quantatitive measurement of free amide group during coupling step of SPPS? I have searched for the reference on this topic but haven't get any reference on the topic. If anyone here has the reference on the quantatitive measurement of free amide group during coupling step of SPPS, may you send me a copy! It will be grateful of me to you kindness!

Thx again!