Background Subtraction
Normalised peak area
(neglecting TF)
625659 Linear #1
541050 Linear #2 (-15%)
663802
Shirley #1 (+6%)
692558 Shirley #2(+10%)
701306 Linear #3 (+12%)
573934 Linear #4 (-9%)
706595 Linear #5 (+13%)
3935881/5.2
=756900 Shirley #3
(difference = +21%)