where A is the absorbance calculated as: A ¼ (A520nm
A700nm)pH1.0 (A520nm A700nm)pH4.5, MW is the molecular weight
for cyanidin-3-glucoside (449.2 g/mol), DF is the dilution factor,
3 is the molar absorbance of cyanidin-3-glucoside (26,900 L/
(cm mol)), l is cell path length (1 cm), and 1000 is the conversion
factor from milligram to gram.
T