Table 5: Concentration of anthocyans in grape skin extracts with respect to malvidin at 537 nm.

SampleMean AbsInitial weight (g)% concentration

“Tesi” 10.25010.0330.247
“Tesi” 20.11710.0350.115
“Tesi” 30.10910.0290.108
“Tesi” 40.08710.0100.086