sample AZ3:
with drawal of red, lower area

 

Point A red: aluminium 10.53 %, silicon 40.48%, sulphur 10.87%, chlorine 1.39%, potassium 0.81%, calcium 1.24%,
barium 30.96%, iron 1.78%, zinc 1.94 %

Point B red: sodium 3.59%, aluminium 14.12 %, silicon 21.45%, sulphur 15.78%, chlorine 2.71%, potassium 1.27%, calcium 5.00%